JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Film Cooling from Two Rows of Holes with Opposite Orientation Angles(II) -Blowing Ratio Effect-
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Film Cooling from Two Rows of Holes with Opposite Orientation Angles(II) -Blowing Ratio Effect-
An, Jun; Jeong, In-Seong; Lee, Jun-Sik;
  PDF(new window)
 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.
 Keywords
Film Cooling;Compound Angle;Boundary Layer Temperature;Adiabatic Film Cooling Effectiveness;Heat Transfer Coefficient Ratio;Heat Flux Ratio;
 Language
Korean
 Cited by
 References
1.
Lee, S. W., Kim, Y. B. and Lee, J. S., 1997, 'Flow Characteristics and Aerodynamic Losses of Film Cooling Jets with Compound Angle Orientations,' ASME J. Turbomachinery, Vol. 119, pp. 310-319

2.
안준, 이준식, 1999, '복합각도로 분사되는 제트의 막냉각 특성,' 대한기계학회 춘계학술대회 논문집 B, pp. 606-611

3.
Muska, J. F., Fish, R. W. and Suo, M., 1976, 'The Additive Nature of Film Cooling from Rows of Holes,' ASME J. Eng. for Power, Vol. 98, pp. 457-464

4.
안준, 정인성, 이준식, 2001, '반대방향의 방향각을 갖는 2열 분사구조의 막냉각 특성(I)-배열의 영향-,' 대한기계학회논문집 심사중

5.
Eckert, E. G., 1984, 'Analysis of Film Cooling and Full-coverage Film Cooling of Gas Turbine Blades,' ASME J. Eng. for Gas Turbine and Power, Vol. 106, pp. 206-213

6.
Mick, W. J. and Mayle, R. E., 1988, 'Stagnation Film Cooling and Heat Transfer including its Effect within the Hole Pattern,' ASME J. Turbomachinery, Vol. 110, pp. 66-72

7.
Kline, S. J. and McClintock, F. A., 1953, 'Describing Uncertainties in Single Sample Experiments,' Mechanical Engineering, Vol. 75, pp. 3-8

8.
Goldstein, R. J., Eckert, E. R. G. and Ramsey, J. W., 1968, 'Film Cooling with Injection through Holes: Adiabatic Wall Temperature Downstream of a Circular Holes,' ASME J. Eng. for Power, Vol. 90, pp. 384-395

9.
Jung, I. S. and Lee, J. S., 1999, 'Effects of Orientation Angles on Film Cooling over a Flat Palte: Heat Transfer Coefficient Ratio and Heat Flux Ratio,' Proc. of Int. Gas Turbine Congress 1999 Kobe, pp. 841-848