Measurement of Viscous Drag on a Disc Rotating in a Low Pressure Gas

Acharya, Tathagata; Falgoust, Jordan; Martin, Michael J.

doi:10.2514/6.2012-3192

Cited by 1 publication

(1 citation statement)

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“…In this work, we measure accommodation coefficients for carbon-related materials, such as graphite, silicon carbide (SiC), etc., in addition to metallic materials, because carbon materials have been widely used for aeroshells. At Louisiana State University, Acharya and Martin et al 6,7 have investigated accommodation coefficients using a disc spin-down experiment in low pressure gases. They have presented momentum accommodation dependence on both target materials and gas chemical compositions.…”

Section: Introductionmentioning

confidence: 99%

Measurements of Surface Accommodation Coefficients for Rarefied Aerodynamics

Ozawa

Suzuki

Fujita

2015

53rd AIAA Aerospace Sciences Meeting

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At Japan Aerospace Exploration Agency (JAXA), a hypersonic rarefied wind tunnel (HRWT) has been developed for rarefied aerodynamic measurements. Rarefied aerodynamics need to be accurately estimated for a precise determination of its flight path or landing site in order to improve the feasibility of space missions, such as a landing mission to Mars, Super Low Altitude Test Satellite, etc. In this work, we have first investigated rarefaction effect on pitot tube measurements experimentally and numerically to improve the understanding of flow characteristics in HRWT. Second, the measurement schemes have been developed by using pendulous models for accommodation coefficients. Consequently, we have successfully demonstrated measurements of accommodation coefficients for several metallic and carbon-related materials, and the determination of accommodation coefficients results in the improvement of rarefied aerodynamic predictions.

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Section: Introductionmentioning

confidence: 99%