TAILIEUCHUNG - Analyse the disk closed cycle MHD generator performance with the influence of channel characteristics
The implemention of inlet swirl is possible to maintain a low static pressure inside the channel and the enthalpy extraction ratio rises due to the increase of Hall parameter. In addition, the channel cross-sectional area ratio increases due to the swirl implementation, the static pressure is kept low, and the channel inlet flow velocity increases. This also leads to the increase of enthalpy extraction ratio, that is the increase of output power. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 19, SOÁ K5- 2016 Analyse the disk closed cycle MHD generator performance with the influence of channel characteristics Le Chi Kien Ho Chi Minh city University of Technology and Education (Manuscript Received on March 12th, 2015, Manuscript Revised April 04th, 2016) ABSTRACT The enthalpy extraction ratio is one of the most significant parameter of a disk closed cycle possible to maintain a high flow velocity inside the channel and a high Hall parameter. The MHD generator. There are two methods to implemention of inlet swirl is possible to improve the enthalpy extraction, those are the increase of channel cross-sectional area ratio maintain a low static pressure inside the channel and the enthalpy extraction ratio rises due to the and the implementation of inlet swirl. In this study, the mechanism of enthalpy extraction increase of Hall parameter. In addition, the channel cross-sectional area ratio increases due improvement has been confirmed by the twodimensional numerical calculation. As a result, to the swirl implementation, the static pressure is kept low, and the channel inlet flow velocity by increasing the channel cross-sectional area increases. This also leads to the increase of ratio of the disk MHD generator, the increase of static pressure and the velocity deceleration can enthalpy extraction ratio, that is the increase of output power. be suppressed due to the Lorentz force, and it is Keywords: Enthalpy extraction, cross-sectional area ratio, inlet swirl, two-dimensional calculation. 1. INTRODUCTION Disk closed cycle MHD (CCMHD) power enthalpy extraction. They are the increase of generation directly converts the thermal and kinetic energy into the electrical energy by channel cross-sectional area ratio and the implementation of inlet swirl. flowing a electrical conduction working fluid in the radial direction into a disk channel which is applied by a magnetic field. Recently, CCMHD generator has .
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