Investigation of Martian-Dust Drag and Heat Transfer for Mars Sample Return Mission

摘要

A Mars nonstop dust sample return project has been proposed in a Mars exploration mission at Japan Aerospace Exploration Agency. To improve the feasibility of this project, the effect of a hot-temperature shock to dust particles was estimated by simulating particle motion, heat transfer, and thermal decomposition. When dust particles travel through the hot-temperature shock, which was calculated by the computational fluid dynamics and direct simulation Monte Carlo, three heat transfer models were compared for the estimation of Martian-dust heating. The results obtained from the macroscopic models were compared with microscopic direct simulation Monte Carlo calculations, and direct simulation Monte Carlo results were found to agree better with the Koshmarov and Svirshevskii and free-molecule models than the Kavanau model. In accordance with the investigation of heat transfer and thermal decomposition of dust particles, it was found that dust-particle sampling is feasible despite the heating due to the interaction with the shock, and the dust constituents are able to survive during the sampling.