SCIENTIFIC ABSTRACT MERZHANOV, A. G. - MERZHEYEVSKAYA, O. I.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001033620006-0
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 3, 2017
• Document Release Date: June 21, 2000
• Sequence Number: 6
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

A. G.
fns of heat tranSfer in t,,p ,,eat --'Y-.rjj(-,rior-l tr
lip-roble
-s Trealsfe",
report subraitted for 2nd Ail-Uniol "'If on Heat ' Mas
jilay 1964.
inst of C,,Iemical Physics; 1)~S USSR'
I

ACCESSION NR: AP4043201 S/0207/64/000/003/0118/0125
AUTHORS: Barzy*kin,,V. V. (Hoscow); Gontkovskaya, V. T. (Moscow); Yarzhanov"
A.-G. (Moscow); Khudyayev, S. I. (Moscow)
TITIZ: Nonstationary theory of thermal explosion
SOURCE: Zhurnal prikladnoy makhaniki i tekhnichaskoy fizdki, no. 3, 1964, 2-18-125
TOPIC TAGS: thermal explosion, h eat transfer, Newtonian heat exchange,,
thermophysics, approximate formula
ABSTRACT: The authors use an electronj~ computer to analyze and solve a system
of partial differential equations for thermal explo3ion for,'a reaction of zeroth
and first order with conductive heat transmission in the reaction zone and Now-
tonia:.i heat exchange. on the boundary. They -.aoalyzo____
ao 0
and 21 7V W 0XP + +
i-+Po (P (10 OXP
T+ 0 a at, 4 at
P
(F Q6k*1 exp
- In- . L 4
CPR 0
Q8,2k* GXP a -r CPRTQ" (2)
-07VT (- Qu
Card '1/2.

ACCESSION NR: A?4041201
'where 9 is heating, 7-is tire, gis a coordinate, (5 is the criterion of Grank-
Kamenetskiy, n = 0,1 and 2 respectively for plane-parallel, cylindrical, and
spherical containers, ~ is the depth of transformation. The dimensionless var-
iables are: T(x,,t) - temperature in the reaction region, To - temperature of the
ambient medium, Q - thermal effect of the reaction, k. - pre-exponent, E activa-
,tion energy, A - coefficient of heat conductivity, c - specific thermal capacity,
P - density, R - universal gas constant, r - radius of the container (for plans-
parallel - half of the thickness). The authors refine the determination of the
basic characteristics of thermal explosion. They present the results in the form
of approximate formulas relating the characteristics of thermal explosion with
all the parameters of the problem in a wide range of variation. A criterion is
given for applicability of the equation averaged over the region for computing
the period of induction in the case Pf conductive heat transmission in the reaction
region, and a method for averaging the system of equations for thermal explosion
is proposed. Orig. art. has, 5 figuresp 6 tables, and 9 formulas.
ASSOCIATION: none
SUBMITTEDs 23Jan64 ENCL: 00
SUB CODE- TD NO R17 SOVt 008 OTHERs
Cat-d 00~
2

V::To I =-il~
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4 N
"I V PT:'
j, /2 4 ~P
J~T-~,j /JW /TATD/rdl
S/0()6Z/64/0W/008/1509A:
1ujVi:xN)10F 14RI IP401,41705 511
;i urlibut G. -Filonanko A K
J! T ITLE -Thleory of reaction e
r g i rae r. in f I ames in the combustion.ofl n
no
volatile condelised systens
SO=E: -All SSSR.' Izvestlya' -,,rjr:Lya ki 8, 10,64 1509 1511
3 Amicheskaya, no.
TOPIC T1 ruSi combust.-ILon- mmloalve pyroyalline solid propollant 1
AB-T1W"0T:- . The 1epp"t1i of the darl': -ne- (x and as ng rate
-preflama zo tho ma buxni
detorl-Arled by ibustion. of xilino P10 0 _t1 CM J11 diOJWtar. -3-4 cm
;uz- r e Coll yro.
TIM
long) ubdch were coniproaced to de Mities -Q~ing from-0.8 to 1*5 g/cm The
nhtswera conducted at 20- 'O.at Ti-e-zsurn -in -a conatartt preasure bomb
ezverim
EV, axppmr m"rintal romil 0 (6 0 Figi. !-and 2 oV
fi led with 11itrogen. 6 qlUation of t 11;-,) t
shoued that -the Pxperirnental:dalua can be-torr lated by the-
proilotmly- dorived thaoi;ctic.al . relau 1.p
xf at

.FRIh
-65 I/E 1
T, 1.6033 00)
S/0076/64/0381011/2640.1,2641
ACCLSSION N R., AP4049606
AUTUOR.- Barzy*kin V.- V. ~(Moscow) Iforzhanov, A,11G. ('Ho s c 01.1
und r c n
TITLE S tudy of thermal explosion of conda-ftsed- gyn tems~ a 0
d i t;i.on aof-jow heat trannfer from tha Gurroun Iding medi-tim
souRce z1iurnal*..fizichesk_oy -1chimii, v. 38,- no, 11 26~40-72647
re, induction peri-od,. ~etryi-,
TURIC TAGS: explosion critical temperatu
dinktroxye thylami ne
ABSTRACT:1 A~method for- de termining from small samples. I- 5-p, the
critical temperature and tha induction.periods o f n ew exp.losiVes has
been d dve I o p e d-. Previous 1 Ab o ra to ry !methods _,fo_r,determinin~ the,
qritiedA parpmeters -from small. samples _.-ising a- directly the-kmostated
reacti~tn_-vessel gave inaccurate results. -The method devplo,,,ed use!;
very 1~ .)w, hea t-transfer coeffi. .cients on the or der'of I.0-3kcal/cin2
sec~grpd._ -The reaction vez sel is cquipped~with~two jackets.' Water
from a, thermostat is-circ'ulated through the outer jacket, while the
is'either evacuated or' filled-.withair, The temperature

A.CCESSION NR: AP4042212 S/0020/64/157/002/0412/0415
AUTHORt MakaLmov, E. I.; Merzhanov, A. G.
TITLEt A model of burning of nonvolatile explosives
SOURCEt AN SSSR. Doklady*, v. 157, no. 2, 1964, 412-415
TOPIC TAGS: explosive, nonvolatile explosive, liquid explosive, solid
explosive, theoretical burning model. combustion, propellant
ABSTRACT: Parr and Crawford9s theory of burning of liquid explosi-res
through the formation of foam in the condensed reaction zone (J. Phys.
Coll. Chem., 54, no. 6, 1950, 927) has been further developed by
theoretically treating the problem of the mechanism of dispersion
during the burning of nonvolatile liquid and solid explosives. A i
i
jaingle-stage model of the burning process is considered which takes
into account reactions-in the liquid phase with a large expansion
~in volume caused by the formation of foam, which is transformed into
!an aerosol. The reaction in the gaseous phase, the dissolution of
,the gaseous reaction products in the liquid phase, and the heat

!ACCESSION NR AP4042212
losses from the reaction zone are neglected. The heat capacity is
assumed to be constant. The equation of state for an ideal gas is
applied to the pressure in the foam bubbles 'and the aerosol. An
approximate solution of the initial system of equations derived for
the burning process with a large expansion in volume was obtained by
,using Zeldovich and Frank-Kamenskiy's assumptien that the convective
heat transfer in the reaction zone may be neglected. Numerical
values of various parameters of the burning process were calculated
on an electronic computer to verify the approximation. The data
i
.were in fair agreement with the theory. Thus, the proposed model
;may be used for calculating the burnfng velocities of liquid and
,melting, solid explosives. Orig. art. hast 2 figures, I table, and
I
1:6 formulas.
IASSOCIATION: Institut khimicheakoy fiziki AkademiL nauk SSSR
;(Institute of Chemical Physics, Academy of Sciences SSSR)
SUBMITTEDt 23Jan64 ATD PRESS9 3067 ENCL: 00
SUB CODE: WAv FP NO REF SOVt 009 OTHERt 002
Card: 2/2--

0-5 Df.;,
_1_IV$1TdW JIM Filt ~11.7.
14 30
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-.A- G
Y a a im6v E -.40,-'Herkhat, iv
_'AU Ito r
ition- of' exp~kosive p, r ti r'-I e s in -
a hot
-157-, no. 6 1-4964, 142 7- 14 30
5 OURCIE Ali SSSR. -DoIklnd,"*, V,
Ignition$- combust
TOPIC T AG 9 explosi've ion, propellant, kolL
'~Prorellant ig nition delay
:ABSTRACT*., -The ignition of, sphe'rical barium az.~deipdrticlcs produced
:by abra,sion of crystals on emery paper was ',studied at-260-1650C in 'vin
a s a em, bjf~ containing an-eler-tri,cally heated vertical glass -tube into
Y,
-par ticla--waa -.-In trodtf6ed -f rom the-, top-~ and ~ prehe a ted air or
'w'-fr-m- the~'-_--6ottom._ -The I hiling -speed-af_ th;-- partic-le could- be
~4 r -c u r r e n i__- a'i r a v For-shorter
d _~,,Th a i iti
use
gn

v7 ENCLOSURE: 02
.
,.!' POP,

4044885
R AP
ACCESS16i4 N

A
/go

113 its Is,

T
2. Depeladence cr b
Fist

welu 'XA(its: .,tnerma.L expiosion,. combustion, ignition, combustion tneory, xinetics,
reaction kinetics
ABSTRACT: A theoretical study has been made of thermal explosion with varying tem-
-perature-of the surrounding medium. The parameters ofthermal explosion were cal-
culated.for mondmolecular, bimolecular, and autocatalytic reactions. Exact and
approximate solutions.were obtained by numerical.integratiohand by pseudoisothermAl
approximation, respectively.- A plot of.explosion temperature vs the rate of heating
showedl,that.in monomolecular.reactions, the.explosion temperature decreases vith in-
of heating to the.critical value'corresponding to static conditions.
JIn alyti'~reactio_ on conversion the.explosion e
auto at a ns, depending temp rature either
tirst nor es
eases( and- then decreases or it only increased. Orig. art... has: 2 figur
~21_fdrmtnas -and 5 tables. IPVI
~t.SUB:CODE: TP/ _SUBM DATE: 02ffov64/ :ORId REF:' -oo6/ ATD PREss:
Card;

L 7703-66
7 SOURCE CODE:
AP5096031 UH/040j/65/
000/001/009310102
AUTHORt: GrIgorlyev, Yu. M. (Moscow); (~oscowh Merzhanov A. G.
(mos.
COW)
ORG:- none,
TITLE: Relationships of i
gnition of homogenous explosive particles in hot gas
SOURCE: Naaichno~-tekhnicheakiye.probleqr goreniya i vzryva, no. 1,1965, 93-102
TOPIC TAGS: combustion, explosion, !xglosive opellant. solid propell ignition
pr.
ci
ABSTRACT: A-theory of thekinetics of decomposition of nonvolatile explosive
particles,in a hot gas has been developed on the basis of a simple model which assumeE
the action-takes condensed particle
the exothermal re place,on-the.surface of the I
which~:,doea not unde phase trins formation or change-of size in the pre-explosion
r9o
~perbod 'that 'the spherical e losive particle enters a cavity filled.with hot gas,
Xp
that- he6t transfer insidethe particle takes.place_by conduction and external heat.:
_trdnsfer by canduction,and:radlation, an that convective transfer is absent. The,
d
analysis yielded expressions for the tetaperature profile ih the gas and inside the
'particle, for:-the'tim6 required to heat the'particle, and for the induction period.,._
To verif~f the theoretical relationships,.experiments were made with nitrocellulose-
-13YMXylinii powder%articles (50-150 V,particle- sizel in horizontal and verticbl
_Oass.tubes. The igaition-temperatures of 50 v particles were 255C in air and 246c
Iscro v2

6 E'
L 4519--6 /-,/FC-) (QIEWA (c (I RFL
ACC N R-. AP5026067 rall/al/wE RM SOURCE CODE: UR/0405/65/00O/0O2/oa62/oo68
At1THPR:: Lisitskiy.-V. la ..(14oscow);.Verzhanov G. (Moscow)
----------
OM none
I gaLt -ion f condensed substances by the flow o
-SOUNCB: Nauchno-tekhnicheskiye probleaW goreniya vzryva, no. 2, 19651 62-68
TOPIC TAGS:: explosive ignition, ignition theory, ignition delay/pyroxylin no 1,
ABSTRACT.- -Previous studies of the ignition of condensed explosives by the flow of
hot, - gases have,not accountedfor the heat exchange conditions. Therefore, a new
apparatus was designed in which the heat exchange between the explosive and thegas
s measured under controlled' condi ti ons xyl
Ignition,of Tylindrtcal charges of,pyro i
:No. 1,,O.06-4.8:~c 3 bythe fl-ov--o-f-Tiot.
m in
diameter d and with a,-- density P 1-5 g/cm
e atltlie gas temperature
or ca n dioxide) was studied
gas -s - (6.ir' nitrogen, axgon, rbo
gas velocity u = 90-270.cm/sec' Re'= 150-550, and ignition delay
To =..250-370C9 an
delay was determined as a function of To, the
time t3 =~ 15-95 sec The igni
-wpperatureLotthe pyroVIinWcharge 'kH 31 and the heat.transfer coefficient a. Mathe-
ma:Ucal, treatment the expeximental results within the similitude theory yielded
1/2 UDC: 536.46.
d:

CC
.[A NRj AP5026067
the f6ilowing expression for determining the dimensionless ignition delV time:
'%,=0,01602H7-,
yhere
r RtO2
- T- ' (EIR TO)]
exp Q.
Herej Is the thermal effect; C, specific heat; E, activation energy; and
-in 1. 64. A graphical presentation of the experimental results in dimensionless,
coordinates shows that only under the following conditions v. G) ~< -c; (H) < -c~'
't. (0):, does th
above,dquation correctly describe the ignition of pyroxylin 1~y -ffot gapes --dnd is prob.
ably applicable for o*her condensed systems inwhich the ignition is not accompanied
by phase transitions. Orig.~art. has: 5 figures and 4 formulas.
SUB CODE4~, MC/SUBN DATE: l8jan65/ ORIG REF: 003/ OTH REF: 005/ ATD PRESS:11M
ard 2/2,

)/FPF(&)/TIF CZ(k) X-'M(c) V 3
L Wo-& MjT,(1)AA1n(M
C NRe. AP5026074, SOURCE CODE: Ult/0406/65/000/002/0108/91- 14
B,
i AUTHOW Strunina; A.. G.; Merzhanov A G - Mayofis, Z.
MTLE-., Dynamic, thermal explosion conditions. Part 2.. Thermal condition
regularities during constant rate cooling
elknicheskiye gorenlya i vzryva, no. -114
N hno t 2, 1965, 10
SOURCE: auc 8
p
4:
TOPIC TAGS: heat of explosion, cooling rate, thermal explosion, explosion intensity
57 Y 5'
ABSTRACT The first part of this paper (Nauchno-tekhnicheakiye problemk goreniya, I
vzr%yva, 1965, 1) investigated thermal explosion conditions during the heating of the
surrounding medium. The present axticle studies these conditions for the case of
coolin The, explosion pattern and -its basic characteristics'are studied. The
.-..:derivation, of the approximate solution to the problem, the results of numerical computer
integrati -system of equations, and a discussion of the critical heating
on of an original
rate, pre -explosion heating, and of other pertinent
-explosion reaction intensity, pre
--parameters describing the. events are given.. The article concludes with, a discussion of
the application of the.linear cooling method to the experimental study of the thermal
explosion of stronglyself-accelerating reactions. The: authors thank. A., S. Ukolov.-, .5~, V,
as
for several computations carried out during the: investigation. Orig. art. has: -13 for
.5 f*
imires, and 3:tables
UDC: MiJMM6.48
SUB, CODE., WA.FP.TD SUBM DATE: 23No-v /0RIGREF:0037.~-__
Mo

1; 158~,0_66.. W41 pID/WL,
AEF-MAP6064428 SOURCE'COD8: Ilk/0414/65/1 /00 /0636/0040
A. G.
;AUTHOR: Str"a, A. GIffascov); Gontkovskaya, V. T. (Mbscov); MES*oy
(Moscow)
'ORG: none
;,TITLE: -Dynamic conditions of thermal'e I
osion. 111. Temperature field during'
~'heating and problems of the transition from spontaneous combustion to i *on
~SOURCE: Fizika goreniya i vzryva, no. 3, 1965, 36-40
JOPIC TAGS, chemical explosion, combustion kinetics, temperature distribution
ABSTRACT:,, Equations for thermal explosion during heating are numerically solved
:withregard.to temperature distribution. The paper is a continuation of previous
studies. (A.' P. Merzhanov, A. G. Strunina, Scientific and Technical Problems of Com-
ibustion.and Explosion, 19651, 1; A. G. Herzhanovs A. G. Strunina, Z. B. Mayofis,
iscientific and3echnical Problems of Combustion and Explosion, 1965, 2) and the no-
I.tation is the same as that used in these articles. The problem was solved on a coin-
1puter.- AniLysis of the numerical solution shows that ignition under dynamic heating
~conditions:ls completely analogous to the process under static conditions. The
~7_
~Card.1/3. UDC!, 536.46+536.48

-15870 66
ACC RR: AP6004428
lbasic parameter in defining the exchange conditions -'is the rate of heating w.
~'Curves are given showing nonstationary temperature profiles for a monomolecular ree-,
~,Iaction at a Biot number of.infinity and various values of w. rour regions are dis-.
Itinguished with respect to heating rate: 1. &a y.6j.-or y < ycom. The folloving additional conclusions ar4
~co icn gnitidn.
The i
!made: at low . MeN -the zeact!-On m4y beassithned t6 ~be of zero order.
a formula previously -ed-by Zelydovich are in some.
;delay times caiculated b~ develon
cases about 50%.lower than the acVual values. Therefore,,.this formula cannot alwaY9
cti~c
'be used. The width -of -the -reaction zore under-a normal regime is pra ally in-
dependent ~of: the t mperature difference :between the source and-the propellent , Orig.
[PV]
art.- has: 9- formulas.-
--ASSOCIATION. Filial Institute khimicheskoy fiziki All SSSR ~W "(Branch ot., t4e
Institute, -for Chemi cal- Physi cs MI assrl) 'T
-26,
D: Tar,65 EN SUB "CODE: FP
SUBMLTTE CL
110: FM V SOV: -003 0 TI IE IIR 0 02' ATD PRESS
2/2

EPA/FP.,k(s'-2/E
Po' .3"
Acu.-r.:ssiou IIR: A_v5ol,7461
UR/0020/65/i62/005/1115/1118
'AIUTHOR- Maksimo I.; Merzhanov, A. Kolesoy'
TITLE: Density -distribution inthe combustion zone of-condensed systems.
ISOURCE- All, SSSR. Doklady, v. 1965,1115-1118
162, no. 5$
-TAGS: ,,"(:Lo olid p
ITOPIC _T~b!_ 5 ropellant, hexogen, combustion mechanism, condensed,
phase reaction
-based: -6 !lobed
RACT, An,expe_iimntal inethod on x-ray a sorption meai~~trements was dev(
- - - =ity rT Tile- at- irface--6f a so prop ant
d6-t6tjni&ng t e Iens f4e-_burnin lid ell
c 5 atm - sbowe - tbat-the -density
c
Px~h e MeAhod.:aD lied to hex oinvustion"at 0.5 to A
changes considerably with -pressure and that the densit
,profile ~y change is gradila
iThe thickness of the Zone in mhich the density-changes,can be, calculated as a func-
..~_ition of the propellant density by means of a Tormula, derived. Motion picture plio-
1tograpby sbowed that foam formed in the.molten propellant layer leads to -aerosol
Iformation. foam formation isattributed to the chemica2l, reaction in the liqldd melt
rather than to-passage of gases or to -'boiling of Ahe overheated melt. -, The: chemical
conversibri Iin the:liquid phase was evaluat ed as 0.15-0.35. Comparing the* Velocity.
i
of the reaetioa front propagation with the burning: velocity actua32y observed, At
oho- Al M 't latter and that-*
ved--that- he 16, ar -is -one order of magnitude smaller -than he

AMMON NR: :AP5013086 UP,/0020/65/163/001/013310136
~j
AIJIHOrt Bostandzhiyan hanov, A.G.; RMfta7
T! LEM Hy on
drodynamic thermal exploai
163, no. 1 1965, 133;..136
1 -SOURCE. AN Doklady v-
V'~' F
TOPIC TAGS- hyd dynamic -thermal explosion, exothermic reaction, thermal explo-
d, laminar flow, nonlinear temperatufe
sion,' chemically1nert fluid, visco" flui
dependence,, energy dissipation, nonlinear heat source-:
~M_
:ABSTRACT.-- In the resence of an exothermic ..chemical reaction in a system there
-P
may arise-conditions in which temperature progressively-increases until the so-
gy wi shows
called thermal explosion takes place. By amalo th the above, the author
-off ect- similar to thermal ex I sion may take, place during th
that an P 0 e flow of a
~inert Viscou ais illustrated with an- elementary examp
chemically- P fluid. Thi le:
ble fluid
Ithe at& I nary tric. laminar flow of a viscous incompressi
-axially symme
of- fixe&.density in an inf ini t e1y- long round tube-under the action of a fixed
6- -Theaystemol-equation o m
ressure gradiefit, s- f otion-and-heat conductioni on:
P
tzaking -into accauut energy dissipation, is,presented And, for the particular case
i;:qr4 1_3

6--203
-55
ACCBMN NR: AP5018086
of-flulds-with it strong temperature-dependencoof viscosity* reduced to the
Fequation
dSO I d0
= 0.
+
uhichIs I-dentir-a 1, -with the ~equation_ of the stationary,theory of thernial cyplosion.
(see, e.g.-Frank-Kamenctskiy, D.A. ZhFKh, 13,~no. 61 738, 1939). ThU 9 many of the
inferences of this theory may he applied to ~thc case considered here. Proceeding
from-this.premise, the author derives formulas-for the calculation of,critical
the al losion" in -the preganc
c0 Ations ofthe hydrodynamic,- exp of Re numbers
At which the flow is laminar. This is illustrated by the.calculation. of such
critical conditions for glycerin-at-Re- 500. The differences between.thermal " ex-
-olosio n" of chemical and of hydrodynamic origin are- defined. I-lius during the f low
of-a-Viscous fluidtftheliberation.of heat ultimately corresponds,to a zero-order.
reacfioil" And - the - do-called - I'b~rnout" is absent.- Furthermore the maxirmim in..tea- 1 -
sity of cbemicall sources of- heat -is present in the center of the, sy'stem. wherean
for mer-hanical sources it is preaent near the surface. As a result, the stationary
temperature profile irk the hydrodynamic-problem is:flatter.in the central layers
and-steb-per in.tbe surface layers. The overall findings-thus indicate that in the
ow
cage of a strong -(nonlinear) temperature-dependence of viscosity ing to energy-
77-'

t. 93975-66 FVF(m) jaF(n)-2_/T/E?2(Q UTIP(e)
AO~ Mg AP6012523,. SOURCE CODE:, UR/0062/661000/003/0422/0429
A. 0.
AUTHOR*, Maksimov E1 Crigorlyev, Yu. M.j. Merzhanoy
ORG: ~Institute of Chemical Physics Academy_of Sciences SSSR (Institut Winicheskay
f iziki AkadeiHi nauk SSSR)
TITLE: The rules and mechanism of ammonium percblorate combustion
96
SOURCE: AN SSSR. Izvestiya. Seriya khimiFheskaya, no. I,MK96, 422-429
TOPIC TAGS: ammonium perchlorate, combustion, solid pXopellant
ABSTRACT: The thermal decomposition of ammonium perchlorate (AP) is discussed exten-
sively in the literature. PA sublimes on hi3ating under high vacuum. Sublimation is
~suppressed with-rising pressure and decomposition with evolution of heat takes place.
Burning of PA occurs.only at higher pressures. The purpose of this work.was to
vestigate.the nature,of combustion of PA depending on temperature, pressure, particle
size, density, and addition of ammonium chloride. Experiments were conducted in a
cons t~ant-press,ure bomb under nitrogen. The temperature was maintained by circulation
of a thermostated liquid. The rate of combustion was determined photograp Ihically on
~A moving film.- Technical grade- PA was used; results obtained from PA purified by
-'recrystallization differed by no more than experimental error (t4%). Samples were
obtained by pressing PA which had been ground and graded according to size. Formation
LCard 1/4 UDC: 541.126+541.124

.U. CZUU7~uu - rlVTL11714-1~4 nvrkr'~ Idukc) i7YEA UZI fif 144 ZI F?,
..,ACc NR. A_p6ooft96 SOURCE CODE: UR/0076/66/o4o/ow/068/070
AUTHOR; Maksimov, E. I Merzhanov, A. G.;,Shkiro, V. M.
ORG:-Branch of the Institute of Chemical Physics.Acalemy of Sciences SSSR (Fild?
Instit.uta.khimicheskoy fiziki Akademii nauk SSSR)
TITLE: Self-ignition of thermite mixtures
SOURCE: Zhurnal fizicheskoy khimii, v. 40, no. 2, 1966, 468-470
TOPIC TAGS: ignition temperature, thermite mixture, activation energy
ABSTRACT: The previously described method for studying thermal explosions (A. G.
Merzhanov, V. G. Abramov, F. I. Dubovitskiy, Dokl. M SSSR, 128, 1238, 1959; V. V.
Barzykin, A. G.Merzhanov, Zh. fiz. khim. 38, 2640, 1964.) was modified and used for
investigating the reaction kinetics and self-ignition temperature of a thermite mixum
consisting of Fe?03 52.5, Al 17.5, and Al 0 30%. The mixture was pressed to form
cylindrical specimens with a constant lenghA to diameter ratio 1/d = 0.2, a density
p 1 2.3 g/cm3 and a t4ckness varying from 0.095 to 0.320 cm. The specimen was
immersed in molten Pb"hnd heated in an electric furnace. The temperature at which
a 11surf" ippeared on the lead surface was found to be the critical self-ignition
temperature of the thermite specimen. The critical temperature decreased as the
thickness of the specimen increased from 810C for a 0.095 cm thick specimen to
676C for a 0.320 cm thick specimen. The activation energ~,and the rate of the
Card 1/2 upc: 5411.

L 21485,46
ACC NRs A-p6oo8o96
heat of' reaction were calculated to be 4o2ooo cal/mole and 4.5 x 108 cal/g-sec,
respectively. Since there is no gas evolution during a thermite reaction, thermite
-.mixtures may be used &s simple models for studying thermal explosions and the self-
ignition of condensed systems. Orig. art. has: 2 figures, 1 table, and 4 formulas.
[PS]
SUB CODE: i9/ sm DATE: o5jan65/ ORIG REEF: 007/ ATD PRESS:
C

--:ACC NR; :AP6011501- SOURCE CODE: UR/0414/65/000/004/0024/0030
-''AUTIIOR*. Hakaiinov, E. I.. (Hoscow); Herzhanov, A. G. (Hoacow); Shkiro,,
VV (Ho 3 cow
ORG:, none
TITLE: Gastess compositions as the simplest combustion model for
condensed systems
SOURCE: Fizika SorenLya i vzryva, no. 4, 1996, 24-30
TOPIC TAGS: solid propellant, combustion, ombustion instability
'-A"TRACT: Condensed phase reactions are of fundamental importance for
udyLng solid Provellant combustion.'~ollowever, the presence of gasift-
a t
cation and gas-phafte re Ction s affects the combustion mech-
anism so that the characteristics of the condensed-phase reactions
can be studied only with a model-mixture in which no gases are formed.
Most of the known thermits have been found to be unsuitable for this
purposer since they all exhibited a considerable pressure effect on tile
burning ve I oLcity, thus indicating the presence of gas-phase reactions.
Therefore, to formulate a thermft which would Lreact only in the con-
densed phase, a mixture of 25% Al and 75% Fe203 was diluced with
amounts of A1203 90 that the burning temperature was lowered
carci 1/ 3 UDC:..:!1536i46+54jr.4Z7.6

-:ACC NR; AP6011501
below the:bolling temperatures of any of its components or products.
These mixtures were compacted to densities in the range of 0.1 < olpmax