| 非烧蚀防热材料地面模拟试验有效性分析 |
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| 作者姓名： | Wang Guolin Meng Songhe Jin Hua |
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| 作者单位： | 1.哈尔滨工业大学 特种环境复合材料技术国家级重点实验室, 哈尔滨 150080 |
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| 基金项目： | 国家自然科学基金青年科学基金项目(11502058),黑龙江省博士后启动基金项目(LBH-Q1605),中央高校基本科研业务专项资金资助项目(HIT.NSRIF.201823) |
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| 摘 要： | 流场化学非平衡度与材料表面催化反应的耦合控制着服役于化学非平衡流场中非烧蚀防热材料表面的气动热载荷，若在该类防热材料性能模拟研究中忽略这一耦合效应，地面模拟试验将无法获得材料的有效使用性能。为此，本文依据钝头体高超声速飞行器边界层驻点热流关系式，分析了影响驻点热流的主要流场参数、地面高焓模拟设备所提供的高焓超声速流场特点以及与飞行热环境之间的主要差异，采用CFD分析了"三参数"模拟方法的有效性。针对化学非平衡边界层驻点传热分析，提出"四参数"模拟方法并分析了"四参数"模拟方法中离解焓无法模拟时的防热材料性能并提出初步解决方法。
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| 关 键 词： | 非烧蚀防热材料 地面模拟试验 化学非平衡流 催化特性 数值模拟 |
| 收稿时间： | 2018-05-11 |
The validity analysis of ground simulation test for non-ablative thermal protection materials |
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| Wang Guolin,Meng Songhe,Jin Hua.The validity analysis of ground simulation test for non-ablative thermal protection materials[J].Experiments and Measur in Fluid Mechanics,2018,32(6):79-87. |
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| Affiliation: | 1.National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China2.Hypervelocity Aerodynamics Institute of China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China |
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| Abstract: | The aerodynamic heat load on the surface of the non-ablative thermal protection materials which served in the chemical non-equilibrium flow field, is controlled by the coupling of chemical non-equilibrium degree of flow field and the surface catalytic reaction of the materials. If the coupled effect is neglected in the performance simulation, the effective service performance cannot be obtained through the ground simulation test. Therefore, according to the stagnation-point heat flux relationship within the boundary layer of the blunt body supersonic vehicle, the present paper analyzes the principal flow field parameters, the characteristics of high-enthalpy supersonic field provided by ground simulation equipment, and the differences between ground and flight environments. The validity of the Three-Parameter-Simulation method is analyzed by the CFD simulation. A Four-Parameter-Simulation method is presented for analyzing the heat transfer of the chemical non-equilibrium stagnation-point boundary layer. Besides, the properties of the thermal protection materials is analyzed and a preliminary solution is proposed when the dissociation enthalpy in the Four-Parameter-Simulation is unable to be simulated. |
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