SCIENTIFIC ABSTRACT A.N. DEVOYNO - B.A. DEVYATKIN

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000410310007-5
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 12, 2000
• Sequence Number: 7
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

32231
A,n investigation of heat exchange S/196/61/ooo/oll,'oll/o42
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of a sudden temperature difference in the layer near the
which has increasing effect on the rate of heat exchange
The molecular free path increases with increasing vacuum
with it the thickness of the layer near the wall. The
relationships obtained can be used to calculate thermal
conditions of thermistors operating in the upper layers
atmosphere. in vacuum instruments and equipment.
4 literature references.
[Abstractor's notes Complete translation.]
wall,
because
and
of the
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AUTHOR,, Devoyno,~ A.N.
TITLEi Use of the electrical-thermial analogy method tc
study the process of heat transfer in rarefied gas
PERIODICAL~ Referativnyy zhurnal, Elektrotekbnika i energetika
no.11, 1961, 1, abstract IIG 6. (Tr, In-ta energ
AN BSSR,, no.111, l.96o, 40-50)
TEXT., The electrical thermal analogy method, which is
described, is suitable for rapid calculations of temperature
r.onditions of bodies in a rarefied gas atmosphere. To calculate
heat exchange by this method it is necessary to establish the
relationship between the temperature difference and pressure of'
individual resistances of the! equivalent electrical circuit
R , R , R.- RX and R where each value respectively represents
M k 1 2'
thermal resistance due to thermal conductivity, convection,
radiation and resistance of the layers near the walls of both
bodies participating in the heat-exchange process. As tile
resistances are non-linear it -is necessary. in designing the
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Use of the electrireL-thermal s/196/61/000/011/0-12/o42
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electri~-al circuit, to construct the volt-ampere zharatteristic's
of each resistance, Then the circuit calculations, i,e. the
determination of current and resistan~:eq (which corresporl to
deiermination of heat fluxes and temperature) are -arri-ed out by
the graphi-al tf-~~hnique for circuits with mixed non-linear
.-? lement s ~The ele-,trical.. thermal analr),S), method is promising
for calculations of trans 'Lent heat exchange pro,_-e~.ises in
rarefied gases,
6 litera-~ure refsren,~es,
s noip,
Complete trans!ation
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DEVOYNO, A. N., Cand Tech Sci -- "Study of 1. ' xchan,,Ye in -'~,
N-V'.A'Aw\
V'S,GlkG at temperatures of up to 21-00C." Minsk, 1961. (Belor[A4-~,t, i,
I
PolYtech Inst im I. V. Stalin) (K1, B-61, 242)
.. 221 -

DEVOYNO., A.N.
Contemporary state of the problem of heat transfer in rarefield
gases. Inzh.-riz, zhur. no.2:119--130 F 161. OURA 14-4)
1. Institut energetiki AN BSSR, Minsk.
(Heat-Tranamicision)
(Gases, Kinetic theory of)

88636
9/170/61/004,/002//017/018
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AUTHOR: Devoyno, A. N.
TITLE: The Present State of the Heat Exchange Problem in Rarefied
Gases
PERIODICAL: Inzhenerno-fizicheskiy zhurnal, 1961, Vol. 4, 110,
PP. 119-130
TEXT: The results of recent studies in the field mentioned in the title
are discussed and completed in part by the author's own findings. A paper
by Kyte, Madden and Piret (Ref. 6) is first discussed, in which the heat
exchange was studied with free convection in diluted atmoophere, Formulas
are given for the heat exchange in the boundary layer of a sphere and a
cylinder, and the temperature field of a ,ertically stretched wire is
discussed. Results concerning the temperature variations around a heated
wire are dealt with more closely. The empirical equations for the heat
exchange of a sphere and a horizontal cylinder are given and the
considerable practical importance attached to the calculation of the heat
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886-16
The Present State of the Heat Exchange S/170/61/004/002/017/016
Y
Problem in Rarefied Gases B019/BO60 1

exchange coefficient at pressures of up to 0.1 mm Hg is pointed out. The
theoretical considerations made in the aboirementioned paper are ,jaid tc
be insufficient. Experimental results obtained by the author regarding
the temperature field at low pressures fit those supplied by t-he said
paper. Fig. 3 illustrates the author's results for the variation of the
heat exchange coefficient of a cylindrical body at low pressures. A
report is then made on a paper by R. Pek, V. Pagen, and R. Verla:rr,.
(Ref. 2) which has dealt with a study of the heat exchange betweiin
parallel vertical plates at lower pressures. It haE been shown in that
paper that at low Grashof numbers the heat exchange coefficient (ices not
depend on the temperature gradient nor on the plate distance. The present
staie of the studies of heat exchange with forced convect4uon is discussed
next. A paper by Stalder and Jukoff (Ref. '1') has dealt wiT-h heat transfer
problems of bodies moving at high speed in the upper strai-a of tl:ie!
atmosphere. This paper is discussed at some length together with the
calculation of the temperature of a plate mo-s-ring at an altillude :!1* 120 to
300 km at a speed of 0 - 11 ktri/sec. The abEIE-nce of an experimenta'11.
demonstration is said to be a major deficiency of that investigation.
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8806
The Present State of the Heat Exchange S/170/61/004/0,)2/017/019
Problem in Rarefied Gases B019/BO60
Stalder, Goodwin, and Creager (Ref. 8) studied the heat exchan.ge in a free
high-speed molecular flow, and a result conoerning the heat exchange of a
plane plate in a flovi with sl:;ppage is said to be of special interest.
The use of boundary conditionj for the slippage and the temperature jump,
as given by Kennard (Ref. 11) is criticized in this connection. Improved
boundary conditions have been set up by A.. A. Pomerantsev (Ref. 1). It i3
stated in conclusion that further studies are required in the f Jeld
concerned, particular importance being at' 'ached to the investiE;ation of
heat exchange'in high-speed ge.ses constituting free molecular f1cws. The.re
are 5 figures and 11 referenccs: 5 Soviet ard 6 US.
ASSOCIATION: Institut energetiki AN BSSR, g. Minsk (Institutue of Po-wer
Engineering of the AS BSSR, Minsk)
SUBMITTED: August 9, 1960
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886,116
0,5 zo -1,0 0 1,0 2,0 IqP
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Legend to Fig. 3: The heat exchange
coefficient as a function of pre3sure.
1) and 2): total heat exchange
coefficient with and without taking
account of the radiation component.
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23751
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AUTHOR- De,.,-oyno, A. N.
TITLEs Basic regularitie3 of heat transfer with natural coavection
in a rarefied gas
PERIODICAL: Inzhenerno-fizicheakiy zhurnal, 1r. 4, no. 6, 1961, 70-77
TEXTz Tho author considers the problem of the heat transfer for B vertical
plate looated in a rarefied gas, which is in a viscous or molecular-
viscous state. The theoretical results are compared with experimental
data. According to the degree of rarefaction there are three typos of gas
statest The viscous, the molecular-viscous, and the moleoular state.
The ratio of the mean free path ~ of a molecule to the dimensions of the
container or to the body d located in the gas will determine the type of
viscous, for 4.6.10-3