Full-Scale MSL Heatshield Material Response Using DSMC and CFD to Compute the Aerothermal Environments

Borner, Arnaud ; Meurisse, Jeremie B E ; Mansour, Nagi N

关键词: ABLATIVE MATERIALS;    AEROTHERMODYNAMICS;    COMPUTATIONAL FLUID DYNAMICS;    HEAT SHIELDING;    LAMINAR BOUNDARY LAYER;    MECHANICAL PROPERTIES;    MONTE CARLO METHOD;    TEMPERATURE EFFECTS;    AEROSPACE ENVIRONMENTS;    ATMOSPHERIC ENTRY;    DATA TRANSMISSION;    ENERGY CONSERVATION;    ENVIRONMENTAL TESTS;    HEAT TRANSFER COEFFICIENTS;    PROBABILITY DISTRIBUTION FUNCTIONS;    THREE DIMENSIONAL MODELS;   

RP-ID  :  ARC-E-DAA-TN57503

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

During Mars atmospheric entry, the Mars Science Laboratory (MSL) was protected by a 4.5 meters diameter ablative heatshield assembled in 113 tiles [1]. The heatshield was made of NASA's flagship ablative material, the Phenolic Impregnated Carbon Ablator (PICA) [2]. Prior work [3] compared the traditional one-dimensional and three-dimensional material response models at different locations in the heatshield. It was observed that the flow was basically one-dimensional in the nose and flank regions, but three-dimensional flow effects were observed in the outer flank. Additionally, the effects of tiled versus monolithic heatshield models were also investigated. It was observed that the 3D tiled and 3D monolithic configurations yielded relative differences for in-depth material temperature up to 18% and 28%, respectively, when compared to the a 1D model.