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Assessment of Laminar, Convective Aeroheating Prediction Uncertainties for Mars-Entry Vehicles

机译:进入火星车辆的层流,对流空气加热预测不确定度的评估

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摘要

An assessment of computational uncertainties is presented for numerical methods used by NASA to predict laminar, convective aeroheating environments for Mars-entry vehicles. A survey was conducted of existing experimental heat transfer and shock-shape data for high-enthalpy reacting-gas CO, flows, and five relevant test series were selected for comparison with predictions. Solutions were generated at the experimental test conditions using NASA state-of-the-art computational tools and compared with these data. The comparisons were evaluated to establish predictive uncertainties as a function of total enthalpy and to provide guidance for future experimental testing requirements to help lower these uncertainties.
机译:美国国家航空航天局(NASA)用于预测火星进入飞行器的层流,对流空气加热环境的数值方法的计算不确定性评估得到了评估。对现有的高焓反应气体一氧化碳,流量的实验传热和冲击形状数据进行了调查,并选择了五个相关的测试系列与预测进行比较。使用NASA最新的计算工具在实验测试条件下生成解决方案,并将其与这些数据进行比较。对比较进行了评估,以建立作为总焓函数的预测不确定性,并为将来的实验测试要求提供指导,以帮助降低这些不确定性。

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