Heat Transfer With Film Cooling Near Nontangential Injection Slots

Abstract

A study of the effect of secondary fluid injection through single nontangential slots on the surface heat transfer in regions near the injection site is presented. The nondimensional parameters governing the heat transfer are obtained from the pertinent differential equations, and experimental results were obtained which cover the range of interest of these parameters for many situations encountered in film cooling applications. The experimental heat transfer rates were obtained from a novel transient test facility, and are presented as ratios of the heat transfer obtained with film injection to the heat transfer obtained with only the single mainstream.

Effects of upstream ramp on the performance of film cooling

“…According to Metzger et al [13], Sen et al [14], and Yu et al [15], the ratio of heat flux on a filmprotected surface to the corresponding baseline value without film cooling q o , can be expressed as…”

Assessment of Various Film Cooling Configurations Including Shaped and Compound Angle Holes Based on Large Scale Experiments

“…Here, all the effects of the cooling film are described with the value of the heat transfer coefficient h( ) as a function of the non-dimensional wall temperature (Choe et al 1974): Metzger et al (1968) and Gritsch et al (1999) proved, that the relationship h( ) is linear and valid even in realistic gas turbine conditions. The linear function can be specified by the equation (5) which is visualized in Fig.(4).…”

Adiabatic Effectiveness and Heat Transfer Coefficient of Shaped Film Cooling Holes on a Scaled Guide Vane Pressure Side Model

“…Here, all the effects of the cooling film are described with the value of the heat transfer coefficient h(θ) as a function of the non dimensional wall temperature θ (Choe et al, 1974): Metzger et al (1968) and Gritsch et al (1999) proved that the relationship h(θ) is linear and valid even in realistic gas…”