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首页> 外文会议>4th European Symposium on Aerothermodynamics for Space Vehicles, Oct 15-18, 2001, Capua, Italy >NUMERICAL AND EXPERIMENTAL ANALYSIS OF SURFACE CATALYCITY EFFECTS FOR MARTIAN ATMOSPHERE ENTRY
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NUMERICAL AND EXPERIMENTAL ANALYSIS OF SURFACE CATALYCITY EFFECTS FOR MARTIAN ATMOSPHERE ENTRY

机译：马氏体大气入口表面催化效应的数值和实验分析

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摘要

An experimental and numerical investigation of the surface catalycity effects on heat fluxes and on integrated heat loads for entry into the martian atmosphere was carried out. The mathematical and physical model used to study the flowfield around a capsule entering a martian (CO_2) environment is developed. Numerical simulations of free flight conditions show that the wall catalytic behaviour may have large influence on the aerothermodynamic loads. Experimental tests have been performed by the Small Planetary Entry Simulator (SPES) facility at the Department of Space Science and Engineering (DISIS). Experimental runs were performed using mixtures of different composition, to simulate Earth and Mars atmospheres. The stagnation point heat fluxes on test models of different catalytic properties were measured. At the same time, numerical computations were performed to correlate the experimental results and to identify the role played by surface catalycity in Mars environment as compared to Earth reentry. These results seem to confirm that surface catalycity effects are more important in the simulated martian atmosphere.
机译：进行了表面催化作用对热通量和进入火星大气层的综合热负荷的实验和数值研究。建立了用于研究进入火星（CO_2）环境的胶囊周围流场的数学和物理模型。自由飞行条件的数值模拟表明，壁的催化行为可能对空气动力负荷有很大的影响。太空科学与工程系（DISIS）的小型行星进入模拟器（SPES）设施已经进行了实验测试。使用不同组成的混合物进行实验，以模拟地球和火星大气层。测量了不同催化性能的测试模型上的停滞点热通量。同时，进行了数值计算以关联实验结果，并确定与再入地球相比，火星环境中表面催化作用所起的作用。这些结果似乎证实了在模拟火星大气中表面催化作用更为重要。

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