Demonstration of enthalpy extraction over 30% with shock-tube driven disk MHD generator
Conference
·
OSTI ID:273302
- Tokyo Institute of Technology, Yokohama (Japan)
Performance of a disk-type CCMHD generator has been investigated. In the power generation experiments, special attention has been devoted to the effect of inlet swirl on generator performance. In order to clarify these effects, one-dimensional numerical simulation has also been performed. Results showed that enthalpy extraction ratio was successfully improved up to 32.5% by employing inlet swirl with the swirl ratio S (=U{sub {theta}}/U{sub r}) of 1. Static pressure and Hall potential distributions were measured and showed that this inlet swirl reduced steep increase in static pressure owing to strong Lorentz force at the inlet of disk channel. Hence relatively low static pressure and thus high Hail parameter were kept throughout the channel, and therefore, remarkable increase in output performance was achieved. Numerical simulation can qualitatively confirm these experimental results. Realization of high Hall parameter and high enthalpy extraction with smaller pressure ratio for the case with inlet swirl leads to improvement of isentropic efficiency.
- OSTI ID:
- 273302
- Report Number(s):
- CONF-930626--
- Country of Publication:
- United States
- Language:
- English
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