Experimental study of gas-film cooling efficiencies in supersonic axisymmetric nozzles
Abstract
A common method of protecting supersonic nozzles against the thermal effects of the flow is to use a gas veil in combination with cooling of the nozzle walls. In order to calculate heat transfer under these conditions one must know the temperature distribution over the insulated nozzle wall in the gas veil region (this distribution is frequently referred to as the gas veil effectiveness). The experiments described in the present paper were aimed at studying the influence of the compressibility and rapid acceleration of axisymmetric flow on the effectiveness of blowing through slits. The supersonic conical nozzles employed were made of textolite. Some of their geometrical parameters were varied. The results are plotted and discussed.
- Publication:
-
Teplomassoobmen V; Vsesoiuznaia Konferentsiia po Teplomassoobmenu
- Pub Date:
- October 1978
- Bibcode:
- 1978TVKTM...1...80V
- Keywords:
-
- Axisymmetric Flow;
- Boundary Layer Separation;
- Film Cooling;
- Gas Cooling;
- Supersonic Nozzles;
- Thermal Protection;
- Adiabatic Conditions;
- Conical Nozzles;
- Separated Flow;
- Stagnation Point;
- Wall Temperature;
- Fluid Mechanics and Heat Transfer