1709 2噴口不足膨張衝突噴流に関する実験的研究(OS17-2 超音速流と衝撃波,オーガナイズドセッション)

概要

論文の詳細を見る
In this paper, twin underexpanded impinging jets are experimentally studied. The flow field is visualized by schlieren and oil-flow method. Local heat transfer coefficient on the plate is calculated using the temperature difference between the adiabatic wall and the constant heat flux wall. The main parameters for the twin jets are the non-dimensional distance between the two nozzle center H/D=2.0, the nozzle to plate separation L/D=2.0 and the pressure ratio defined by p_0/p_b between 3.0 to 4.6, where D is the diameter of each nozzle exit, p_0 is the stagnation pressure and p_b is the back pressure. In this research, it is confirmed that the stagnation bubble is observed for the parameter H/D=2.0, L/D=2.0 and p_0/p_b=4.0 in oil-flow method. It is found that the heat transfer coefficient is increased due to the generation of fountain flow.
一般社団法人日本機械学会の論文
2010-10-29