Film Cooling Effectiveness From a Single Scaled-Up Fan-Shaped Hole: A CFD Simulation of Adiabatic and Conjugate Heat Transfer Models

Abstract

This paper documents a computational investigation of the film cooling effectiveness of a 3-D gas turbine endwall with one fan-shaped cooling hole. The simulations were performed for adiabatic and conjugate heat transfer models. Turbulence closure was investigated using three different turbulence models; the realizable -model, the SST -model, as well as the 5 5 @ 0 % = #

Film-cooling of cylindrical hole with downstream surface dielectric barrier discharge actuators

“…The realizable k-e was performed well with two-layer approach [23,24]. In the two-layer approach, the whole flow domain is separated into a viscous region (Re y 200) and a fully turbulent region (Re y P 200) by defining a turbulent Reynolds number: where y is the distance from the wall and k is the turbulence kinetic energy.…”

“…The turbulence model of realizable k-e was successfully employed to predict film-cooling effectiveness such as [23,24]. In this study the transport equations for turbulent kinetic energy (k) and its dissipation rate (e) are described as [25] @ @t…”

Film cooling sensitivity of laidback fanshape holes to variations in exit configuration and mainstream turbulence intensity

“…The commonly used and validated realizable ke model with the enhanced wall treatment for film cooling simulation [34,35] was employed in the present study. The discretization scheme for the convection terms was the QUICK scheme.…”

Improvement of a Turbulence Model for Conjugate Heat Transfer Simulation

“…Researchers have performed investigations on the influence of the turbulence model on the prediction accuracy of CHT simulations [10][11][12][13][14]. The two-equation turbulence models were found to predict an anomalously large growth in turbulent kinetic energy when the high strain rate influences the turbulent kinetic energy with moderate intensity [15].…”