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 nonpower 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 of the induced disturbances attenuate approximately 0.4 second after the power generation, the time scale that the disturbances exist in the facility is estimated to be 1 second at most.

Original languageEnglish
Pages (from-to)46-52
Number of pages7
JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume158
Issue number1
DOIs
Publication statusPublished - 2007 Jan 15
Externally publishedYes

Keywords

  • Closed-loop experimental facility
  • Continuous operation
  • Nonequilibrium MHD power generation
  • Transient response

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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