Velocity measurements of incident and reflected shock waves in various gases and in saturated water vapour
Abstract
A four-beam laser interferometer is presently used to perform incident and reflected shock wave velocity measurements, where the run-time determination beam distance of only 3.3 mm insures instantaneous velocity measurement in the cases of both ideal shock-shock reflection and real end wall reflection. It is noted that noble gases show significant reflected shock velocity variations for both methods, while such complex gases as CCl2F2 are almost unaffected by end wall influences. Saturated water vapor has been filled in a perpendicular shock tube, and velocity measurements of incident and reflected shock waves have been made which show that, for Mach numbers greater than 1.65, spontaneous condensation at a copper end wall generates rarefaction waves which decelerate the reflected shock.
- Publication:
-
Shock Tubes and Waves
- Pub Date:
- 1982
- Bibcode:
- 1982stw..proc..167G
- Keywords:
-
- Incident Radiation;
- Laser Interferometry;
- Rare Gases;
- Reflected Waves;
- Shock Wave Interaction;
- Velocity Measurement;
- Water Vapor;
- Condensing;
- Copper;
- Mach Number;
- Saturation (Chemistry);
- Shock Tubes;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer