Transient Response of Closed Loop MHD Experimental Facility

Hidemasa Takana, Yoshihiro Okuno, Hiroyuki Yamasaki

Research output: Contribution to journalArticlepeer-review

Abstract

Transient responses of a closed loop MHD experimental facility from non-power generation to power generation have been investigated by means of time-dependent quasi-one-dimensional numerical simulations. For the long-time continuous power generation experiment, the time required to obtain the steady state for the power generation is estimated to be approximately 20 hours. By increasing the electrical input power to the heater as an exponential function of time, the temperature increment of ceramics can be moderated. When the duration of the experiment is around 10 minutes, argon gas temperature at the exit of the heater hardly changes because of the large heat capacity of structure materials. It is found that the fluid disturbances are induced at the instant of the power generation and they propagate as they repeatedly reflect at the sudden change of duct shape. Since all the induced disturbances attenuate approximately 0.4 seconds after the power generation, the time scale that the disturbances exist in the facility is estimated to be 1 second at largest.

Original languageEnglish
Pages (from-to)1343-1348
Number of pages6
JournalIEEJ Transactions on Power and Energy
Volume124
Issue number11
DOIs
Publication statusPublished - 2004

Keywords

  • closed loop experimental facility
  • continuous operation
  • non-equilibrium MHD power generation
  • transient response

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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