Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций
Год издания: 1996
Ключевые слова: Carrier concentration, Computer simulation, Electric conductivity of gases, Electric generators, Electric power generation, Electron beams, Enthalpy, Inert gases, Magnetic fields, Plasma flow, Supersonic flow, Closed cycle magnetohydrodynamic generators, Nonuniform gas plasma flow, Recombined plasma clots, Magnetohydrodynamic power generation
Аннотация: A new concept of a closed cycle MHD generator without alkali seed has been suggested. The essence of it is the phenomenon of `frozen' conductivity for recombined plasma which appears for noble gas at Te4000 K. At the inlet of the MHD channel in supersonic flow of noble gas (He or Ar) the plasma clots with electron density about 101Показать полностью5 cm-3 are formed by pulsed intense electron beam with energy about 300 keV. Gas flow drives these clots in a cross magnetic field along the MHD channel which has electrodes connected with the load by Faraday scheme. The gas flow pushes plasma layers and produces electric power at the expense of enthalpy extraction. The numerical simulation has shown that a supersonic gas flow, containing about 4 plasma layers in the MHD channel simultaneously, is braked without shock waves creation. This type of the MHD generator can provide more than 30% enthalpy extraction ratio and about 80% isentropic efficiency. The advantages of the new concept are the following: (a) possibility of working at higher pressure and lower temperature, (b) operation without alkali seed.
Журнал: Proceedings of the Intersociety Energy Conversion Engineering Conference
Выпуск журнала: Vol. 2
Номера страниц: 836-841