Experimental investigation on effects of cross-flow Reynolds number and blowing ratios to film cooling performance of the Y-shaped hole

•An experimental study on effects of cross-flow Reynolds number and blowing ratios to film cooling performance of the Yshaped Hole are presented.•The film cooling effectiveness and heat transfer coefficient were measured by the transient liquid crystal measurement technique.•Flow resistance measurements were carried out to obtain the discharge coefficient.•The variation of discharge coefficient, film cooling effectiveness, heat transfer coefficient and net heat flux ratio are analyzed.•In the range of parameters studied in this paper, a positive effect of the film cooling performance for the Y-shaped hole is presented.