Influence of fluctuations and nonuniformities on performance of closed cycle MHD generators
Conference
·
OSTI ID:273331
- Tokyo Institute of Technology, Yokohama (Japan); and others
Seed fraction fluctuation and ionization instability are discussed as a reason of plasma nonuniformities and fluctuations of MHD generator performances nearly fully ionized seed. The measurements of seed fraction fluctuations and radiation from plasma taken during recent experiments with FUJI-1 facility, experiments with a model of seed injection system with water instead of seed, linear and nonlinear theory of ionization instability are used for this purpose. Three different ranges of fluctuations frequency of plasma parameters were detected in experiments: several hertz, about 100 hertz and several tens kilohertz. First two are caused by imperfection of existent seed injection system. As for fluctuations with a frequency about several tens kilohertz those were observed even at highest enthalpy extraction. Seed fraction space nonuniformities caused by droplet structure of seed injection and ionization instability are examined as possible reasons for this kind of fluctuations. Seed fraction space nonuniformities are seemed one of the reasons of these fluctuations in FUJI-1 experiments. It is pointed out the necessity of considerable improvement of seed injection system in order to increase MHD power conversion efficiency.
- OSTI ID:
- 273331
- Report Number(s):
- CONF-930626--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Three-dimensional simulation of nonequilibrium seeded plasma in closed cycle disk MHD generator
Experimental studies on closed cycle MHD power generation with Fuji-1 facility
Numerical simulation of discharge structures in Ar/Cs nonequilibrium plasma MHD generator
Journal Article
·
Mon Mar 31 23:00:00 EST 1997
· IEEE Transactions on Plasma Science
·
OSTI ID:522418
Experimental studies on closed cycle MHD power generation with Fuji-1 facility
Book
·
Mon Dec 30 23:00:00 EST 1996
·
OSTI ID:442748
Numerical simulation of discharge structures in Ar/Cs nonequilibrium plasma MHD generator
Conference
·
Wed Jul 01 00:00:00 EDT 1998
·
OSTI ID:20000318