Numerical simulation on operation of closed‐loop experimental facility with subsonic MHD generator

The operating characteristics and operation procedure of the closed‐loop experimental facility under subsonic power generation have been investigated by means of time‐dependent quasi‐one‐dimensional numerical simulations. Two ways of operation for subsonic power generation were found: (1) subsonic operation both under nonpower and power generation and (2) supersonic operation under nonpower generation and subsonic operation under power generation. For operation (1), Mach number at channel inlet decreases to ∼0.6, therefore it is required to generate plasma under this Mach number. On the other hand, if the plasma cannot be generated, operation (2) needs to be carried out. In this case, a shock wave appears in the generator channel, then the influence of a large pressure change and a vibration caused by a shock wave in the generator channel needs to be considered. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 163(1): 25–33, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20399

[1]  K. Imai.  Statistical Analysis of Electrical Breakdown in a Micro Gap Using Weibull Distribution and Discussion on its Processes in High Voltage , 2004 .

[2]  Yoshihiro Okuno,et al.  Numerical Simulation on Operating Characteristics of Closed Loop MHD Experimental Facility , 2004 .

[3]  Y. Okuno,et al.  Magnetohydrodynamic Power Generation Experiments with Fuji-1 Blowdown Facility , 2003 .

[4]  Tomoyuki Murakami,et al.  Construction of Closed Loop Facility for CCMHD Power Generation , 2003 .

[5]  T. Murakami,et al.  Achievement of the Highest Performance of Disk MHD Generator: Isentropic Efficiency of 60 % and Enthalpy Extraction Ratio of 30 % , 2003 .

[6]  Kunio Yoshikawa,et al.  Proposal of a Highly Efficient CCMHD Single Power Generation System , 1998 .

[7]  V. P. Kuznetsov,et al.  Compact high-power MHD electric station on natural gas , 1998 .

[8]  H. C. Yee.  Upwind and Symmetric Shock-Capturing Schemes , 1987 .

[9]  C. Sleicher,et al.  A convenient correlation for heat transfer to constant and variable property fluids in turbulent pipe flow , 1975 .

[10]  M. Dalle Donne,et al.  Heat transfer and friction coefficients for turbulent flow of air in smooth annuli at high temperatures , 1973 .

[11]  Herbert Oertel.  Convective Heat and Mass Transfer , 2010 .

[12]  J. F. Wendt,et al.  Computational Fluid Dynamics - An Introduction - A von Karman Institute Book , 1992 .

[13]  C. Hirsch.  Numerical computation of internal and external flows , 1988 .

[14]  D T Swift-Hook,et al.  Partially Ionized Gases , 1975 .

[15]  T. Asanuma,et al.  On the Formula for Turbulent Flow in the Annular Space Formed by Double Circular Pipes , 1952 .