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http://dx.doi.org/10.5293/IJFMS.2014.7.3.086

Performance Enhancement of 20kW Regenerative Blower Using Design Parameters  

Jang, Choon-Man (Environmental Engineering Research Division, Korea Institute of Construction Technology)
Jeon, Hyun-Jun (Environmental Engineering Research Division, Korea Institute of Construction Technology)
Publication Information
International Journal of Fluid Machinery and Systems / v.7, no.3, 2014 , pp. 86-93 More about this Journal
Abstract
This paper describes performance enhancement of a regenerative blower used for a 20 kW fuel cell system. Two design variables, bending angle of an impeller and blade thickness of an impeller tip, which are used to define an impeller shape, are introduced to enhance the blower performance. Internal flow of the regenerative blower has been analyzed with three-dimensional Navier-Stokes equations to obtain the blower performance. General analysis code, CFX, is introduced in the present work. SST turbulence model is employed to estimate the eddy viscosity. Throughout the numerical analysis, it is found that the thickness of impeller tip is effective to increase the blower efficiency in the present blower. Pressure is successfully increased up to 2.8% compared to the reference blower at the design flow condition. And efficiency is also enhanced up to 2.98 % compared to the reference one. It is noted that low velocity region disturbs to make strong recirculation flow inside the blade passages, thus increases local pressure loss. Detailed flow field inside the regenerative blower is also analyzed and compared.
Keywords
Regenerative Blower; Design Parameter; Pressure; Blower Efficiency; Numerical Simulation;
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Times Cited By KSCI : 1  (Citation Analysis)
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