연료전지용 연료승압 블로어 내부유동장 평가
Internal Flow Analysis of a Fuel Pressurized Blower for Fuel Cell System
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초록
This paper describes an internal flow characteristics of a fuel pressurized blower, used for 1kW domestic fuel cell system. To analyze the flow field inside the diaphragm cavity, compressible unsteady numerical simulation is introduced. SST model with scalable wall function is employed to estimate the eddy viscosity. Moving mesh system is applied to the numerical analysis for describing the volume change of a diaphragm cavity in time. Throughout numerical simulation with the modeling of the inlet and outlet valves in a diaphragm cavity, unsteady nature of an internal flow is successfully analyzed. Force variations on the lower plate of a diaphragm cavity are evaluated in time. It is found that the driving force at the suction stage of a diaphragm cavity is more necessary than that at the discharging stage.
Abstract
This paper describes an internal flow characteristics of a fuel pressurized blower, used for 1kW domestic fuel cell system. To analyze the flow field inside the diaphragm cavity, compressible unsteady numerical simulation is introduced. SST model with scalable wall function is employed to estimate the eddy viscosity. Moving mesh system is applied to the numerical analysis for describing the volume change of a diaphragm cavity in time. Throughout numerical simulation with the modeling of the inlet and outlet valves in a diaphragm cavity, unsteady nature of an internal flow is successfully analyzed. Force variations on the lower plate of a diaphragm cavity are evaluated in time. It is found that the driving force at the suction stage of a diaphragm cavity is more necessary than that at the discharging stage.
참고문헌 (4)
- Development of BOP for 1kW Fuel Cell System, "Nagata", Toshiba, ~ (2006)
- Choi, K. R., "Optimization of a Cavity in the Diaphragm Blower", Proceeding of 2011 KSME Spring Conference on Fluids Engineering Division, pp.121~122 (2011)
- Jang, C. M., "Performance Analysis of Diaphragm Blower for Fuel Cell", Proceeding of 2010 SAREK Conference, pp.1006~1011 (2010)
- "CFX-12 User Manual, 2009, Ansys inc", ~ (2009)