円筒孔を通過する希薄気体の穴板温度上昇による流量抑制効果 : 非定常実験と直接シミュレーション

抄録

A suppressive effect of rarefied gas flow through a circular office caused by temperature increase of the orifice plate has been investigated experimentally using the unsteady approach. Also numerical analysis has been carried out using the direct simulation Monte-Carlo method. Flow rate decreases as the temperature of the orifice plate increases, in proportion to a square root of the ratio between gas temperature and the plate temperature. In spite of the finiteness of the simulation space due to the three dimensional extent of the space, the simulation results are in good agreement with the experimental results. The suppressive effect of gas Flow is found appreciably even in the small plate of which high temperature area is several times as large as a cross-sectional area of its aperture.