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Analysis of the effect of the decomposition of char-forming heat-insulating materials on the free discharge of a gas mixture

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Abstract

The article presents results of a numerical solution of a nonsteady problem on the free discharge of a mixture of gases from a hemispherical volume with allowance for thermal decomposition of heat-insulating materials.

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Abbreviations

V:

volume

S:

area

t:

τ

P:

p

T:

θ

u:

v

Q:

q, dimensional and dimensionless time, pressure, temperature, TIM decomposition rate, and heat flux

γ:

adiabatic exponent

R:

gas constant

ρ:

density

H:

specific enthalpy

c:

specific heat

λ:

thermal conductivity

α, β, θs :

dimensionless complexes

ɛ:

coefficient expressing the radiative properties of the gas medium and the heat-transfer surface

σ:

Stefan-Boltzmann constant

0:

initial state and scale factors

s:

surface

Π:

coke

M:

TIM material

P:

pyrolysis front

A:

ablation front

v:

volatile degradation products

α :

adiabatic conditions

c:

completion of discharge

Literature cited

  1. I. A. Charnyi, Principles of Gas Dynamics [in Russian], Moscow (1961).

  2. L. G. Loitsyanskii, Mechanics of Liquids and Gases [in Russian], Moscow (1970).

  3. Mastanayakh, Teploperedacha,98, No. 1, 152–157 (1976).

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  4. Yu. V. Polezhaev and F. B. Yurevich, Thermal Protection [in Russian], Moscow (1976).

  5. V. P. Mugalev, Heat and Mass Transfer, Vol. 1 [in Russian], Minsk (1968), pp. 32–37.

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  6. N. N. Kalitkin, Numerical Methods [in Russian], Moscow (1978).

  7. V. P. Isachenko, V. A. Osipova, and A. S. Sukomel, Teploperedacha, Moscow (1981).

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Authors and Affiliations

  1. Scientific-Research Institute of Applied Mathematics and Mechanics at Tomsk State University, USSR

    I. G. Borovskoi, A. B. Vorozhtsov & E. A. Kozlov

Authors
  1. I. G. Borovskoi
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  2. A. B. Vorozhtsov
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  3. E. A. Kozlov
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Additional information

Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 54, No. 5, pp. 787–793, May, 1988.

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Borovskoi, I.G., Vorozhtsov, A.B. & Kozlov, E.A. Analysis of the effect of the decomposition of char-forming heat-insulating materials on the free discharge of a gas mixture. Journal of Engineering Physics 54, 534–539 (1988). https://doi.org/10.1007/BF00872573

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  • DOI: https://doi.org/10.1007/BF00872573

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