Effect of blowing ratio, rotation, and film hole row location on film cooling on the suction surface of a rotating turbine blade

•Local blowing ratio was not uniformly distributed along spanwise direction.•Increasing coolant mass flow strengthens uneven blowing ratio distribution in span.•Increasing coolant mass flow rebuilds film coverage in span.•Increasing rotational Reynolds number weakens the inward film deflection.•Blowing ratio, rotation, and row location have combine effects on film cooling.