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真实的大气参数随时间和地理位置变化,而且有随机性的大气波动叠加,处于波动状态,造成高超飞行器大气层飞行面临的真实热环境,远比标准大气模型预测结果复杂得多.在70 km以上大气参数变化尤其复杂.本文利用美国TIMED卫星在2002~2010年8年间对北半球典型纬度地区上空85 km高度大气参数在典型月份期间内的实测统计结果,开展了大气参数分布特性对飞行器热环境具有代表性的驻点热流的影响研究.研究发现大气的波动对高超飞行的热环境有着重要和复杂的影响.同纬度地区4月或7月的热流会偏大,在同一季节,高纬度地区的热流分布往往会大于低纬度地区.在极端情况下,热流会比标准大气参数模型预测的热流高40%以上.
The real atmospheric parameters vary with time and geographic location, and random fluctuations of the atmosphere, in a fluctuating state, resulting in the real thermal environment facing the aerospace flight over the aircraft far more than the prediction of the standard atmospheric model results in more than 70 km The variation of atmospheric parameters is particularly complicated.In this paper, based on the measured data of the atmospheric parameters of 85 TIM above the typical northern latitudes over the typical month in the eight-year period from 2002 to 2010 in the United States from 2002 to 2010, this paper carried out the atmospheric distribution of atmospheric parameters on the thermal environment of the aircraft The study shows that the atmospheric fluctuation has an important and complicated impact on the thermal environment of the super flight.The heat flux in April or July at the same latitude will be larger, and in the same season, the high latitudes The heat flow distribution tends to be greater than at lower latitudes, and in extreme cases the heat flow is more than 40% higher than the heat flow predicted by the standard atmospheric parameter model.