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Multiphysics modelling of MarsTEM shield

机译:MarsTEM防护罩的多物理场建模

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摘要

MarsTEM, the temperature sensor of the DREAMS (Dust characterization, Risk assessment and Environment Analyzer on the Martian Surface) package, which will fly on ExoMars 2016 EDM (Entry, Descent and landing demonstrator Module), will provide atmosphere temperature measurements near Mars' surface. As an effect of direct solar radiation, environment albedo and thermal infrared radiation, these temperature measurements will be modified. Therefore, the possibility to design a radiation shield in the sensor structure has been evaluated. Multiphysic simulations have been done in order to quantify the effect of direct solar radiation and thermal infrared radiation on sensor measurements for three different configurations: five-plates shield, three-plates shield and no-shield. Two different materials have been considered: aluminium alloy and titanium alloy. The results of our analysis show that at the Martian noon the best configuration is the no-shield one. In the second part of the paper it is shown the thermal model of the final MarsTEM version.
机译:MarsTEM是DREAMS(火星表面上的灰尘特征,风险评估和环境分析仪)套件的温度传感器,它将在ExoMars 2016 EDM(进入,下降和着陆演示器模块)上飞行,将提供火星表面附近的大气温度测量值。由于直接太阳辐射,环境反照率和热红外辐射的影响,这些温度测量将被修改。因此,已经评估了在传感器结构中设计辐射屏蔽的可能性。已经进行了多物理场仿真,以量化三种不同配置的直接太阳辐射和热红外辐射对传感器测量的影响:五板屏蔽,三板屏蔽和无屏蔽。已经考虑了两种不同的材料:铝合金和钛合金。我们的分析结果表明,在火星正午,最佳配置是无屏蔽配置。本文的第二部分显示了最终MarsTEM版本的热模型。

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