Coupling simulation of convective heat transfer characteristics and new idea for hot-wall correction considering non-equilibrium effects

被引：0
|
作者：
Yang X. [1 ,2 ]
Xiao G. [1 ]
Gui Y. [1 ]
Liu L. [1 ]
Du Y. [1 ]
机构：
[1] State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang
[2] College of Aeronautics and Astronautics, National University of Defense Technology, Changsha
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷
关键词：
Chemical reaction; Computational fluid dynamics; Convection; Hot-wall correction; Hypersonic; Interface physics; Non-equilibrium effects;
D O I：
10.11949/0438-1157.20200588
中图分类号：
学科分类号：
摘要：
The interaction between high-enthalpy/chemical-nonequilibrium flow and surface materials brings complex coupling convective heat transfer characteristics, leading to weak applicability of hot-wall correction method (HWC) for rapid evaluation of aerodynamic thermal environment. In view of the above problems, this paper deals with HWC improvement via coupling numerical simulation of catalytic heating on carbon-based materials in carbon-oxygen dissociation environment. On the basis of the numerical simulation of hypersonic aerodynamic heating/structural heat transfer interaction, the chemical non-equilibrium effect and the interface high-temperature chemical effect were deeply analyzed. The coupling results show that the linearity of wall chemical heatflux and temperature is weakened due to interface thermochemistry, while the temperature-gradient part maintains high linearity. Accordingly, a new idea to improve HWC was proposed by decomposing the contribution of heatflux into two physical processes: one obeying the conventional HWC, and the other independent of boundary layer profiles. In-depth analysis shows that the latter can be simply dealt with by computing reaction rates from chemistry mechanism, eliminating the need for full CFD/CHT coupling computation. © 2020, Editorial Board of CIESC Journal. All right reserved.
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页码：152 / 160
页数：8
相关论文
共 30 条
  • [21] Marschall J, MacLean M., Finite-rate surface chemistry model (I): Formulation and reaction system examples, 42nd AIAA Thermophysics Conference, (2011)
  • [22] Wright M J, Tang C Y, Edquist K T, Et al., A review of aerothermal modeling for Mars entry missions, 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, (2010)
  • [23] Park C, Howe J T, Jaffe R L, Et al., Review of chemical-kinetic problems of future NASA missions (Ⅱ): Mars entries, Journal of Thermophysics and Heat Transfer, 8, pp. 9-23, (1994)
  • [24] Suzuki K, Abe T., Thermochemical nonequilibrium viscous shock-layer analysis for a Mars aerocapture vehicle, Journal of Thermophysics and Heat Transfer, 8, pp. 773-780, (1994)
  • [25] Yang X F, Gui Y W, Qiu B, Et al., Numerical investigation on influence of surface two-step catalytic mechanism on non-equilibrium aerodynamic heating for high-enthalpy CO<sub>2</sub> flow, Journal of National University of Defense Technology, 42, 1, pp. 108-116, (2020)
  • [26] Blottner F G, Johnson M, Ellis M., Chemically reacting viscous flow program for multicomponent gas mixtures, (1971)
  • [27] Wilke C R., A viscosity equation for gas mixtures, Journal of Chemical Physics, 18, pp. 517-518, (1950)
  • [28] Milos F S, Chen Y K, Congdon W M, Et al., Mars pathfinder entry temperature data aerothermal heating and heatsheild material response, Journal of Spacecraft and Rockets, 36, 3, pp. 380-391, (1999)
  • [29] MacLean M, Wadhams T, Holden M., Investigation of blunt bodies with CO<sub>2</sub> test gas including catalytic effects, 38th AIAA Thermophysics Conference, (2005)
  • [30] Thornton E A, Dechaumphai P., Coupled flow thermal and structural analysis of aerodynamically heated panels, Journal of Aircraft, 25, pp. 1052-1059, (1988)
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