極超音速風洞の水分管理

概要

論文の詳細を見る
Variations of pitot pressure were observed at Mach 10 nozzle calibration tests of the Japan Aerospace eXploration Agency 1.27m hypersonic wind tunnel. The nozzle calibration data were examined and the non-isentropic condensing flow was suspected by humidity in the working gas of air. In order to decrease the humidity amount, the facility was modified to suppress the water condensations in the heating parts and the steady-state pitot pressures were obtained. Before and after the modifications, the tunnel flow condition were statistically assessed to confirm the repeatable isentropic flow. As a result, the efficient humidity management combined with the operation cycle was established. Both the humidity amount and the nozzle exit wall pressure should be monitored to assure the water-effect free flow.
社団法人日本航空宇宙学会の論文
2007-10-05