MEASUREMENT OF FILM EFFECTIVENESS FOR CYLINDRICAL AND ROW TRENCHED COOLING HOLES AT DIFFERENT BLOWING RATIOS

作者：Kianpour Ehsan; Sidik Nor Azwadi Che^*; Golshokouh Iman

来源：Numerical Heat Transfer Part A-Applications, 2014, 66(10): 1154-1171.

DOI：10.1080/10407782.2014.901042

This study was performed to investigate the effects of cylindrical and row trenched cooling holes with alignment angle of 0 degrees and 90 degrees at different blowing ratios on the film-cooling performance adjacent the endwall surface of a combustor simulator. The film-cooling blowing ratios varied from 1.25 to 3.18. In this study, a three-dimensional representation of a Pratt and Whitney gas turbine engine was simulated and analyzed with a commercial finite volume package FLUENT 6.2.26. The analysis has been carried out with Reynolds-averaged Navier-Stokes turbulence model on internal cooling passages. This combustor simulator was combined with the interaction of two rows of dilution jets, which were staggered in the streamwise direction and aligned in the spanwise direction. Film cooling was placed along the combustor liner walls. In comparison with the baseline case of cooling holes, the application of row trenched hole near the endwall surface doubled the performance of film-cooling effectiveness.

• 出版日期2014