THE INTERACTION OF A REFLECTED SHOCK WITH THE CONTACT SURFACE AND BOUNDARY LAYER IN A SHOCK TUBE
Abstract
The experiment was designed to investigate the departures of the hypersonic shock tunnel operated by the reflected-shock technique from the simple theoretical model, by providing photographs illustrating the interaction of the reflected shock with the boundary layer and with the contact region. Results were obtained for representative values of primary shock Mach number, using hydrogen as the driving gas and nitrogen as the driven gas. The work demonstrates that there are striking differences between the observed flows and those assumed in inviscid theory, and that there are associated discrepancies with the predictions of the theory. These are particularly marked in connection with the disturbances reflected from the contact surface, and with the motion of the shock transmitted through the contact surface when the primary shock Mach number is high. On the other hand, the motion of the contact surface, after meeting the reflected shock, is in reasonable agreement with theoretical predictions. As far as the operation of shock tunnels is concerned, the results are not discouraging, especially at the tailored condition where there appears to be reasonable agreement with the promising predictions of theory. It is noted, however, that, because of the low pressure levels employed, the present results are in some respects dissimilar to those observed in other shock-tunnel investigations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 19, 1961
- Accession Number
- AD0273535
Entities
People
- C. M. Stuart
- D. W. Holder
- R. J. North