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通过地面模拟试验来验证尘暴环境对探测器性能的影响,对我国开展火星探测任务具有重要的意义。本文提出了一种火星尘暴环境模拟系统方案,为便于进行尘暴流场的数值模拟,建立了尘暴热物性参数计算公式,完成了尘暴发生装置气动结构设计及建模。火星尘暴模拟分析结果显示:在压力为600 Pa,温度为233 K,沙尘体积分数为2.6×10~(-8)时,尘暴速度可达74 m/s;温度对流场品质影响较小;压力增大时,流场均匀性变差、速度梯度增大。本文研究成果可为进一步开展火星尘暴环境模拟系统研制提供技术支持。
Through the ground simulation test to verify the impact of dust storm environment on the performance of the probe, it is of great significance to carry out Mars exploration mission in our country. In order to facilitate the numerical simulation of the storm flow field, a formula to calculate the thermal physical parameters of the dust storm was established and the aerodynamic structure design and modeling of the dust storm occurred. The simulation results of Mars dust storm show that the dust storm velocity can reach 74 m / s under the pressure of 600 Pa, the temperature of 233 K and the dust volume fraction of 2.6 × 10 -8, and the temperature has little effect on the quality of the flow field When the pressure increases, the uniformity of the flow field becomes worse and the velocity gradient increases. The results of this paper can provide technical support for the further development of Mars dust environment simulation system.