Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Film Cooling from Two Rows of Holes with Opposite Orientation Angles(II) -Blowing Ratio Effect-

반대방향의 방향각을 갖는 2열 분사구조의 막냉각 특성(II) -분사비의 영향-

  • 안준 (서울대학교 대학원) ;
  • 정인성 (서울대학교 터보.동력기계연구소) ;
  • 이준식 (서울대학교 기계항공공학부)
  • Published : 2001.08.01
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Abstract

Experimental results are presented, which describe the effect of blowing ratio on film cooling from two rows of holes with opposite orientation angles. The inclination angle is fixed at 35°, and the orientation angles are set to be 45°for the downstream row, and -45°for the upstream row. The studied blowing ratios are 0.5, 1.0 and 2.0. The boundary layer temperature distributions are measured using thermocouple at two downstream locations. Detailed adiabatic film cooling effectiveness and heat transfer coefficient distributions are measured with TLC(Thermochromic Liquid Crystal). The adiabatic film cooling effectiveness and heat transfer coefficient distributions are discussed in connection with the injectant behaviors inferred from the boundary layer temperature distributions. Film cooling performance, represented by heat flux is evaluated from the adiabatic film cooling effectiveness and heat transfer coefficient data. The results show that the investigated geometry provides improved film cooling performance at the high blowing ratios of 1.0 and 2.0.

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References

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