0810 自由ピストン型膨張波管の性能評価試験

抄録

Preliminary test results were reported about the free-piston driven expansion tube facility in JAXA Kakuda. The facility originally built as the free-piston shock tunnel HEK was modified to the expansion tube HEK-X. Over-all length of the facility was 37m and expansion tube diameter was 72mm, in which test models up to 40mm diameter can be used. The facility was designed to produce 14km/s hypervelocity free-stream (stagnation enthalpy 100MJ/kg). In the present shakedown test campaign, shock speed of 8.5km/s (stagnation enthalpy 70MJ/kg) in expansion tube was successfully obtained. Free-stream Pitot pressure at the exit of expansion tube was also measured.