LONG LIFE CLOSED LOOP MHD RESEARCH AND DEVELOPMENT UNIT.
Abstract
The effect of wall friction and heat transfer on MHD devices has been examined and the key parameters affecting the efficiency are given. A Reynold's analogy was used to study the effect of heat transfer. Photoionization has been proposed as a means of ionizing the gas in the MHD duct. An experiment was devised to measure the electrical conductivity of a Cs vapor which is ionized by ultra-violet radiation from commercial mercury lamps. Using the ultra-violet radiation from two H-4 100 watt mercury lamps, an electrical conductivity of approximately .01 mho/m was measured for a Cs pressure of x.01 torr. Calculations indicate that ambipolar diffusion is the dominating electron-ion pair loss mechanism. Therefore, the measured electrical conductivity may be larger than the measured value if this loss mechanism is retarded. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 15, 1963
- Accession Number
- AD0420060
Entities
People
- E. V. Somers
- F. A. Holmes
- J. G. Desteese
- R. E. Voshall
- R. L. Hundstad
Organizations
- Westinghouse Electric Corporation