滑移流区化学非平衡流中气动热环境的数值模拟

doi:10.7527/S1000-6893.2022.27980

Abstract

Abstract:

Numerical simulation predicting the aero-heating of chemical non-equilibrium flow in the slip flow regime has been carried out for the Orbital Reentry Experiment （OREX） vehicle by solving multicomponent chemical non-equilibrium Navier-Stokes（N-S） equations. A detailed comparison is made between the finite rate catalytic and non-catalytic， slip and no-slip wall conditions， and the influence of surface catalysis and slip effects on aero-heating is studied. The main mechanism affecting aero-heating is also analyzed. The results show that surface catalysis and slip effects influence the distribution of flow properties， with a strong impact on the shock stand-off distance at 92.82 km. With the decrease in altitude， the gap of heat flux increases between the finite rate catalytic and non-catalytic wall conditions， while decreases between the slip and no-slip wall conditions. At an altitude lower than 92.82 km， the stagnation point heat flux of the finite rate catalytic wall agrees well with the flight data， with the deviation within 11%. In the area near the wall， the catalytic effect has a considerable influence on species distribution， while the temperature jump condition of slip effects exerts a significant impact on the temperature distribution.

Key words: hypersonic, chemical non-equilibrium, surface catalysis, slip effects, aero-heating enviroment

CLC Number:

V211.3

Chongxiao LIU, Jiangfeng WANG. Numerical simulation of aero-heating in slip flow regime with chemical non-equilibrium[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(16): 127980-127980.

Figures/Tables 17

Table 1

Table 2

Computational conditions

高度/km	Ma_∞	温度/K	密度/（10^-5 kg·m^-3）	$X N 2$	$X O 2$
80	27.8	181	1.999	0.763	0.237

Table 2

Fig.1

Fig.2

Table 3

Fig.3

Fig.4

Fig.5

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Fig.7

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Fig.14

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反应编号	化学反应式
1	O₂+M₁↔2O+M₁
2	N₂+M₂↔2N+M₂
3	N₂+N↔2N+N
4	NO+M₃↔N+O+M₃
5	NO+O↔N+O₂
6	N₂+O↔NO+N
7	N+O↔NO⁺+e^-

算例	高度/km	Ma_∞	努森数	温度/K	密度/（kg·m^-3）	壁温/K
1	92.82	26.97	0.017 00	188.70	3.009×10^-6	492
2	88.45	27.07	0.011 00	186.90	4.306×10^-6	587
3	84.01	26.82	0.004 70	188.90	1.095×10^-5	690
4	79.90	25.96	0.002 80	198.60	1.845×10^-5	808
5	75.81	25.04	0.001 40	206.82	3.658×10^-5	928

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Numerical simulation of aero-heating in slip flow regime with chemical non-equilibrium

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