再入返回飞行器舱内压力动态变化的预测技术研究  

Study on Dynamic Change Prediction of Inner Pressure of Reentry Vehicle Cabin

作　　者：解静[1] 张莽[1] 周正阳[1] 李小艳[1] 

机构地区：[1]中国运载火箭技术研究院研究发展中心,北京100076

出　　处：《导弹与航天运载技术》2016年第4期59-62,共4页Missiles and Space Vehicles

基　　金：国防基础科研计划基金(JCKY2013601B)

摘　　要：对于采用封闭舱室布局的再入返回飞行器,短时间内飞行高度的变化会导致舱室结构承受较大的内外气压差。为了减小这种压差载荷,通常会在表面合适位置设计合理的通气孔,使舱内压力随外界压力的变化而变化。提出的准一维等熵流法和非定常CFD相结合的方法,有效地解决了飞行器表面气流高速流动与进排气过程强烈耦合的非定常流动难题,实现了飞行过程中舱内压力动态变化的精确预测,并结合某飞行试验对亚声速状态进行了验证,具有较强的工程借鉴意义。For the reentry vehicle made up of cabin, the quickly change of flight altitude can induce the huge air pressure difference across the skin of vehicle. In order to reduce the pressure difference, logical vent system is designed on the surface of vehicle, making the inner pressure of cabin change with outside air pressure. The way of one dimension isentropic flow theory and unsteady CFD are used in this paper to simulate the intense unsteady flow of high speed air ttansflux the vehicle skin, enter the cabin through the vent, and exactly calculate dynamic change of the inner pressure of cabin in flight, validated by subsonic flight experimentation, which providing important reference for the engineering department.

关 键 词：再入返回飞行器 舱内压力 动态变化 

分 类 号：V412[航空宇航科学与技术—航空宇航推进理论与工程]