Journal ArticleDOI
Investigation on the Film Cooling Performance of Diffuser Shaped Holes with Different Inclination Angles
TLDR
In this article, a transient liquid crystal measurement technique has been used to investigate the performance of laidback hole and laidback fan-shaped hole film cooling under small and large blowing ratios, respectively.Abstract:
Abstract Film cooling performances of laidback hole and laidback fan-shaped hole have been investigated using transient liquid crystal measurement technique. For film cooling of laidback hole, the increase of inclination angle reduces the film cooling effectiveness under small blowing ratio, while produces better film coverage and higher film cooling effectiveness under larger blowing ratios. Heat transfer coefficient is higher in the upstream region of laidback hole film cooling with large inclination angle, while laidback hole with small inclination angle has relatively higher heat transfer coefficient in the downstream region. The increase of inclination angle reduces the film cooling effectiveness and heat transfer coefficient of laidback fan-shaped hole film cooling, especially in the upstream region. Increase of inclination angle is beneficial to the thermal protection of laidback hole film cooling under large blowing ratio. Film hole with large inclination angle has larger discharge coefficient due to smaller aerodynamic loss in the hole.read more
Citations
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Journal ArticleDOI
Experimental and numerical study on the effects of rib orientation angle on film cooling performance of compound angle holes
TL;DR: In this article, the effects of the inclined ribs on internal flow structure in film hole and the film cooling performance on outer surface, experimental and numerical studies are conducted on the effect of rib orientation angle on film cooling of compound angle holes.
Journal ArticleDOI
Effect of cooling hole configurations on combustion and heat transfer in an aero-engine combustor
TL;DR: In this article, a numerical model was developed to investigate the combustion and cooling performance of an aero-engine combustor, and four types of holes, namely cylindrical holes, conical holes, fan-shaped holes and console holes, were introduced to reduce the thermal load of thermal barrier coatings (TBCs) in combustor.
Journal ArticleDOI
Large-Eddy Simulation of Shaped Hole Film Cooling with the Influence of Cross Flow
TL;DR: In this article, the effect of cross flow on the shaped film cooling hole is studied by Large Eddy Simulation (LES); modal analysis is conducted with an incremental POD (iPOD) approach, which makes the analysis of the large data sets from LES feasible.
Journal ArticleDOI
Effects of Inclination Angle, Orientation Angle and Hole Length on Film Cooling Effectiveness of Rectangular Diffusion Holes
TL;DR: In this article, the film cooling effectiveness of rectangular diffusion holes under an inclination angle α, β, and β was examined in a flat-plate experimental facility using the pressure sensitive paint (PSP) technique.
References
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Journal ArticleDOI
A review of shaped hole turbine film-cooling technology
TL;DR: In this article, a review examines the origins of shaped film cooling and summarizes the extant literature knowledge concerning the performance of such film holes, showing the basic shaping geometries, parameter ranges, and types of data obtained.
Journal ArticleDOI
Effects of hole geometry and density on three-dimensional film cooling
TL;DR: In this article, the effects of hole geometry, secondary fluid density, and mainstream boundary layer thickness on the film cooling performance of secondary gas injection through discrete holes have been studied experimentally.
Proceedings ArticleDOI
Adiabatic Wall Effectiveness Measurements of Film-Cooling Holes With Expanded Exits
TL;DR: In this article, the authors present detailed measurements of the film-cooling effectiveness for three single scaled-up film cooling hole geometries, including a cylindrical hole and two holes with a diffuser-shaped exit portion.
Proceedings ArticleDOI
Film Cooling With Compound Angle Holes: Heat Transfer
TL;DR: In this paper, the authors measured the heat transfer coefficient of a single row of holes laterally directed with a compound angle of 60 degrees, and showed that the results were combined with adiabatic effectiveness results to evaluate the overall performance of the three geometries.