Using a Thin Wire in a Free-Molecular Flow for Determination of Accommodation Coefficients of Translational and Internal Energy

Abstract. A new experimental-computational method for determination of the translational and internal energy accommodation coefficients on a thin wire in a free-molecular flow is elaborated. The base of the method is a numerical solution of the heat balance equation of the wire. Measurements were performed in a low-density wind tunnel with Ar, He, H2, N2, CH4, CO2. Besides, the proposed method provides determination of thermophysical properties of the wire. I