抄録
Holographic interferometric visualization was made of diffraction of shock waves using a diaphragmless shock tube. The diaphragmless shock tube, instead of using a conventional rupture diaphragm method, employs a consistently repeatable rubber membrane for separating the high pressure chamber of the shock tube from the low pressure channel, enable to generates shock waves with the very low scatter of shock Mach number ± 0.25%. Making advantage of this shock tube performance, diffraction of shock waves passing through a sharp 90°comer for Ms=1.10, 1.50 and 2.0, was visualized Emphasis was given to the case of Ms=1.50. It is well demonstrated that holographic interferometric visualization together with a reliable diaphragmless shock tube can provide quantitative measurement of entire processes of shock wave diffraction over a sharp 90° comer.
