返回舱烧蚀外形对配平特性影响分析

摘要

In order to investigate the effect of ablation on the re-entry capsule,numerical simulation is used to analyze the trim characteristic of Soyuz re-entry capsule.The aerodynamic characteristic and the trim characteristic are researched as the aerodynamic configuration is changed due to the recession of thermal protection thickness.The result indicates that absolute value of the trim angle of attack and trim lift-drag ratio of Soyuz re-entry capsule are decreased with mach number increasing in hypersonic flow(Ma >8),and the effect of recession is to increase absolute value of the trim angle of attack and trim lift-drag ratio.The results compare well with the conclusion of CEV in overseas reference.The Soyuz and CEV have same changes in the law about trim characteristic,and recessed configuration of them also have similar changes in trends.The research offers reference for the aerodynamic configuration design and improve of the Soyuz re-entry capsule.%为研究烧蚀对返回舱配平特性的影响，采用数值模拟方法计算分析了类联盟号返回舱在不同马赫数下的配平特性，同时研究了因烧蚀防热层厚度变化所引起的气动外形改变后的气动特性，尤其是配平特性的变化情况。结果表明：在高超声速段（Ma＞8），类联盟号返回舱的配平攻角绝对值和配平升阻比随着马赫数的增大而减小；因烧蚀防热层厚度变化所引起的气动外形变化后，配平攻角绝对值会增大，配平升阻比也相应增加；研究结果与国外文献中对 CEV 外形的研究结论相符合，类联盟号外形与 CEV 外形在配平特性上具有相同的变化规律，烧蚀对其配平特性的影响规律也相同。