ON THE CHOICE OF MERCURY VAPOR AS TESTING MEDIUM FOR A PLASMA TUNNEL AND SOME OF ITS AERODYNAMIC PROPERTIES.
CONVAIR SCIENTIFIC RESEARCH LAB SAN DIEGO CA
Pagination or Media Count:
A current project at the Convair Scientific Research Laboratory aims at the development of a plasma tunnel for advanced aerodynamic studies. The plasma is to be generated by directing a gas stream at high speed through a radio frequency field which has an intensity of the order of 1000 Voltcm. Although this is much stronger than the fields employed in conventional gas breakdown tests with zero gas speed it is to be expected from the results of those tests that an appreciable percentage of ionization can be produced only at densities which are by several orders of magnitude below atmospheric. The project, therefore, faces all the problems associated with a low density wind tunnel. As is well known, tunnels of this type permit neither recompression of the flow by diffusers nor application of the blowdown principle. They require, therefore, also at moderate test section sizes, huge vacuum pumps or ejectors for immediate removal of the large gas volumina passing through the test section. Author
- Test Facilities, Equipment and Methods
- Fluid Mechanics