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Keywords: film cooling
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Proceedings Papers

Proc. ASME. GT2021, Volume 4: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage; Education; Electric Power, V004T09A008, June 7–11, 2021
Paper No: GT2021-59470
... with predictions also indicated that there was generally a very good match in the Mach numbers and metal temperatures for all the turbine blades and vanes. gas turbine aerodynamics cooling heat transfer testing validation film cooling operation Proceedings of ASME Turbo Expo 2021 Turbomachinery...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A019, June 7–11, 2021
Paper No: GT2021-59530
...Abstract Abstract With the arrangements of vortex generators (VG) and ramp, film cooling effects on endwall near leading edge were numerically investigated at two blowing ratios (i.e. M = 0.5 and M = 1). To determine suitable numerical methods, mesh independency analysis and turbulence...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A005, June 7–11, 2021
Paper No: GT2021-58991
...Abstract Abstract Discrete film cooling holes are limited by subtractive manufacturing techniques and experience depreciating performance when operating above critical velocity ratios. This study introduces an alternative method of bringing coolant to the surface of the blade via finite strips...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A023, June 7–11, 2021
Paper No: GT2021-59780
...Abstract Abstract In gas turbine engines, the highest heat loads occur at the leading-edge areas of turbine blades and vanes. To protect the blades and vanes, a “showerhead” configuration of film cooling holes is often used for this location, in which several rows of holes are configured...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A008, June 7–11, 2021
Paper No: GT2021-59144
...Abstract Abstract Aiming at investigating the effects of crossflow and vortex generator on film cooling characteristics of fan-shaped hole, the film cooling performance was measured experimentally by infrared camera. The blowing ratio is fixed at 0.5 and 1.5. The Reynolds number...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A026, June 7–11, 2021
Paper No: GT2021-60014
...Abstract Abstract The high heat loads at the leading-edge regions of turbine vanes and blades necessitate the most robust thermal protection, typically accomplished via a dense array of film cooling holes, nicknamed the “showerhead.” Although research has shown that film cooling using shaped...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A025, June 7–11, 2021
Paper No: GT2021-59993
... cascade. Different turbulence models were validated by comparing to the experimental data. It was found that results predicted by the shear-stress transport with the γ-Re θ transition model have the best precision. Then, the film cooling performance, the flow field in the tip gap and the leakage losses...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A004, June 7–11, 2021
Paper No: GT2021-58950
...Abstract Abstract Few studies in the open literature have studied the effect of thermal barrier coatings when used in combination with shaped hole film cooling and enhanced internal cooling techniques. The current study presents RANS conjugate heat transfer simulations that identify trends...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A010, June 7–11, 2021
Paper No: GT2021-59196
...Abstract Abstract Film cooling is a common technique to manage turbine blade thermal environment. The geometry of the holes which are used to generate the cooling film is known to play a very important role on thermal performances and finding the most optimized shape involves rigorous...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A027, June 7–11, 2021
Paper No: GT2021-60015
...Abstract Abstract The effects that leading-edge impingement coolant feeds have on the external flowfield and on film cooling performance in the showerhead have not been studied thoroughly in the literature. To isolate the influence of the impingement feed, experimental adiabatic effectiveness...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A012, June 7–11, 2021
Paper No: GT2021-59269
...Abstract Abstract Uncertainty due to operating conditions in gas turbines can have a significant impact on film cooling performance, or even the life of hot-section components. In this study, uncertainty quantification technique is applied to investigate the influences of inlet flow parameters...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A028, June 7–11, 2021
Paper No: GT2021-60050
.... The film cooling effectiveness over the turbine vane’s pressure side with two types of holes was measured using the pressure-sensitive paint (PSP) technique. With the 7-7-7 shaped hole serving as the baseline, the sister shaped hole was compared side-by-side to examine its cooling performance at exit Ma...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A016, June 7–11, 2021
Paper No: GT2021-59413
...Abstract Abstract Effects of SDBD and DBD-VGs plasma actuations on film cooling performance of a plain wall were numerically investigated based on the RANS solutions and linearized body force model. With a user defined function (UDF), the plasma actuation forces were implemented...
Proceedings Papers

Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A001, June 7–11, 2021
Paper No: GT2021-58451
...Abstract Abstract This paper proposed an alternating elliptical film hole for gas turbine blade to restrain kidney vortex and enhance film cooling effectiveness, based on the multi-longitudinal vortexes generated in alternating elliptical tube. The detailed flow structures in film hole...
Proceedings Papers

Proc. ASME. GT2021, Volume 5B: Heat Transfer — General Interest; Internal Air Systems; Internal Cooling, V05BT13A013, June 7–11, 2021
Paper No: GT2021-59874
... by the blade rotation press the mist on the blade suction side flowing near the blade surface, providing more enhanced film cooling effectiveness. The weak oblique shock waves do not exert a significant effect on the air/mist cooling effectiveness. Injecting a 10% mist ratio noticeably improved the cooling...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A015, September 21–25, 2020
Paper No: GT2020-14417
...Abstract Abstract This paper focuses on the influences of the discrete hole shape and layout on the blade endwall film cooling effectiveness. The effect of upstream purge slot injection on the film cooling performance of the discrete hole was also investigated. The diffusion slot hole was first...
Proceedings Papers

Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A035, September 21–25, 2020
Paper No: GT2020-15780
... will become much significant, resulting in possibilities of erosion and creep problems. To find a balance between these two conflicting goals, one method is the use of pressure-side cutback, which extends into the coolant slot to get film cooling and also achieves a thin trailing edge. Due to the interactions...
Proceedings Papers

Proc. ASME. GT2020, Volume 4B: Combustion, Fuels, and Emissions, V04BT04A029, September 21–25, 2020
Paper No: GT2020-15939
..., namely swirl and dilution jets. film cooling effusion jets blowing ratio acetone planar laser induced fluorescence proper orthogonal decomposition Dynamics of Effusion Cooling Fluid in a Pressurized Swirl Combustor Flow Aravind Chandh1, Askar Kazbekov1, Angie Zhang1, Subodh Adhikari1, David...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A028, September 21–25, 2020
Paper No: GT2020-14787
...LARGE-EDDY SIMULATION OF FILM COOLING PERFORMANCE ENHANCEMENT USING VORTEX GENERATOR AND SEMI-SPHERE Wen Wang1,2, Jiahuan Cui1,2, Shaoxing Qu1 1School of Aeronautics and Astronautics, Zhejiang University, Hangzhou, 310007, China 2ZJUI institute, Zhejiang University, Haining, 314400, China ABSTRACT...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A006, September 21–25, 2020
Paper No: GT2020-14234
... simulation; Cutback blade trailing edge; Geometric configurations; Film cooling; Unsteady fluid flow; Mixing process. NOMENCLATURE Aslot area of the slot exit [m2] B-R Brown-Roshko Cd discharge coefficient CFD computational fluid dynamics D pin fin diameter [m] DES detached eddy simulation Copyright © 2020...