Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Effect of Vanes on Flow Distribution in a Diffuser Type Recuperator Header

디퓨저 타입 레큐퍼레이터 헤더에서 유동분배에 미치는 베인의 영향

  • Jeong Young-Jun (Graduate School, Kookmin University) ;
  • Kim Seo-Young (Thermal/Flow Control Research Center, KIST) ;
  • Kim Kwang-Ho (Thermal/Flow Control Research Center, KIST) ;
  • Kwak Jae-Su (School of Aerospace and Mechanical Engineering, Hankuk Aviation University) ;
  • Kang Byung-Ha (School of Mechanical and Automotive Engineering, Kookmin University)
  • 정영준 (국민대학교 대학원) ;
  • 김서영 (한국과학기술연구원) ;
  • 김광호 (한국과학기술연구원) ;
  • 곽재수 (한국항공대학교 항공우주 및 기계공학부) ;
  • 강병하 (국민대학교 기계자동차공학부)
  • Published : 2006.10.01
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Abstract

In a SOFC/GT (solid oxide fuel cell/gas turbine) hybrid power generation system, the recuperator is an indispensible component to enhance system performance. Since the expansion ratio to the recuperator core is very large, generally, the effective header design to distribute the flow uniformly before entering the core is crucial to guarantee the required performance. In the present study, we focus on the design of a diffuser type recuperator header with a 90 degree turn inlet port. To reduce the flow separation and recirculation flows, multiple horizontal vanes are used. The number of horizontal vanes is varied from 0 to 24. The air flow velocity is measured at 40 points just behind the core outlet by using a hot wire anemometer. Then, the flow non-uniformity is evaluated from the measured flow velocity. The experimental results showed that inlet air velocity did not effect on relative flow non-uniformity. According to increasing the number of horizontal vanes, flow non-uniformity reduced about $40{\sim}50%$ than without using horizontal vanes.

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References

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