CONTROL OF FLOW SEPARATION IN SUPERSONIC NOZZLES BY MEANS OF BOUNDARY-LAYER INJECTION
A review of previous investigations of flow separation in supersonic de Laval nozzles indicated a need for experimental data on the effect of the nozzle heat-transfer condition on jet-detachment behavior, and on the feasibility of controlling the point of separation of an overexpanded flow by fluid injection through a porous boundary. An experiment was designed to obtain the desired information by means of pressure-distribution measurements and schlieren observation. Owing to delays in the delivery of quartz nozzle-wall windows of the optical quality required for schlieren photography of high-stagnation- temperature flow patterns, the present investigation was limited to studies in which dry nitrogen was expanded from ambient temperatures. It was found that under these conditions the boundary-injection technique was indeed effective in promoting controlled separation at expansion ratios approaching the optimum value. (auth)
- Research Organization:
- Aerojet-General Corp., Azusa, Calif.
- NSA Number:
- NSA-12-004149
- OSTI ID:
- 4339375
- Report Number(s):
- AGC-1381
- Country of Publication:
- United States
- Language:
- English
Similar Records
Binary condensation in a supersonic nozzle
The influence of nucleation and droplet growth on the onset of condensation in supersonic nozzle expansions