The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Comparative Study of the Steady State and Transient TSP Techniques in the Heat Transfer Measurement by an Inclined Impingement Jet

경사 충돌 제트 열전달 실험에서 정상 상태와 천이 TSP 기법의 비교 연구

  • 조용화 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 노영철 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 이용진 (한국항공대학교 항공우주 및 기계공학과 대학원(국방기술품질원)) ;
  • 곽재수 (한국항공대학교 항공우주 및 기계공학부)
  • Received : 2011.01.14
  • Accepted : 2011.04.24
  • Published : 2012.02.01
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Abstract

In this paper, the heat transfer coefficient measurement techniques using TSP(temperature sensitive paint) were introduced and the results of a comparative study on the heat transfer coefficient measurement by steady state and transient TSP techniques were discussed. The distributions of heat transfer coefficient by a single $60^{\circ}$ inclined impingement jet on a flat surface were measured by both techniques. Tested Reynolds number based on the jet diameter (d) was 30,000 and the distance between jet exit and target plate (L) was fixed at 10d. Results showed that the measured Nusselt number by both techniques indicated significant difference except near the center of impingement jet. Also, the heat transfer coefficients measured by the transient TSP technique were affected by the reference temperature of the jet. Based on the measured data, characteristics of both TSP techniques were analyzed and suggestions for applying them were also given.

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References

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