Flow formation in a gasdynamic molecular source at low Reynolds numbers
Abstract
The mechanism of the formation of free molecular flow is examined for the case where the source of flow formation is the nonisentropic part of a strongly underexpanded jet. For this case, a model of flow in a hypersonic source is developed which allows for the viscosity and real properties of the gas over the entire range of flow conditions from continuous to free molecular. It is shown that flow intensity increases with decreasing Reynolds number in the critical nozzle section. At low Reynolds numbers, maximum flow intensity can be achieved for relatively small pressure gradients.
- Publication:
-
PMTF Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki
- Pub Date:
- August 1985
- Bibcode:
- 1985PMTF........83G
- Keywords:
-
- Computational Fluid Dynamics;
- Free Molecular Flow;
- Jet Flow;
- Low Reynolds Number;
- Rarefied Gas Dynamics;
- Hypersonic Flow;
- Nonisentropicity;
- Pressure Gradients;
- Fluid Mechanics and Heat Transfer