Measurement of Continuum Breakdown during Disc Spin-down in Low Pressure Air

Acharya, Tathagata; Falgoust, Jordan; Martin, Michael J.; Rasmussen, Richard E.

doi:10.2514/6.2014-2115

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…The measured ∆x and α are listed in Table 2. Acharya et al 37 have measured tangential momentum accommodation coefficients using disc spin-down experiments in low pressure gases, and our data are also compared with their results in the table. It can be seen in the table that while diffuse-like surface conditions were estimated for SUS, graphite, SiC and C/C composite, the accommodation coefficient for aluminum was found to be lower than the other materials.…”

Section: Materials Dependence Of Accommodation Coefficientssupporting

confidence: 59%

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: Materials Dependence Of Accommodation Coefficientssupporting

confidence: 59%