Transient pressure measurement at the end of a high-enthalpy reflected shock tube
Abstract
Theory for reflected shock tubes operating in under-tailored mode indicate that an over-pressure is expected at the end of the shock tube behind the reflected shock wave. This pressure should be significantly higher than the equilibrium interface, or 'reservoir' pressure observed over a longer timescale. Paradoxically measurements of the pressure at the end of a high-enthalpy shock tube often fail to register a significant over-pressure, even when under-tailored. This paper reports recent measurements of the reflected shock pressure with significant over-pressures being recorded. A theory is developed which explains the shorter duration of the over-pressure. The higher magnitude of the over-pressure is not yet fully explained.
- Publication:
-
Current Topics in Shock Waves
- Pub Date:
- 1990
- Bibcode:
- 1990ctsw.proc..642G
- Keywords:
-
- Pressure Measurement;
- Shock Tubes;
- Transient Pressures;
- Enthalpy;
- Overpressure;
- Reflected Waves;
- Fluid Mechanics and Heat Transfer