Results 21 to 30 of about 12,641 (264)
Propulsion and Power Research, 2013 The film cooling mechanism and characteristics of a row of cylindrical holes with branched jet injections were investigated by numerical simulation. Three geometries for the branched jet injection holes and four blowing ratios were considered.
Yu Yao, Jingzhou Zhang, Yang Yang
doaj +1 more source
Effect of spherical blockage configurations on film cooling
Thermal Science, 2018 With increasing inlet temperature of gas turbines, turbine blades need to be effectively protected by using cooling technologies. However, the deposition from the fuel impurities and dust particles in the air is often found inside film holes, which results in partial hole blockage.
Wang, Jin +4 more
openaire +3 more sources
Propulsion and Power Research, 2012 In order to study the effect of cross-flow directions of an internal coolant on film cooling performance, the discharge coefficients and film cooling effectiveness with one inlet and double outlet hole injections were simulated.
Guangchao Li +4 more
doaj +1 more source
Energies, 2021 The forward expansion hole improves the film cooling effectiveness by reducing the penetration of the coolant jet into the main flow compared to the cylindrical holes.
Seung Il Baek, Jaiyoung Ryu, Joon Ahn
doaj +1 more source
Pressure Gradient Effects on Film Cooling [PDF]
Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, 1995 Film cooling effectiveness was studied experimentally using a flat plate test facility with a single row of inclined round holes which injected high density, cryogenically cooled air. A pressure distribution representative of the suction side of a gas turbine blade was imposed on the test plate using a top wall contour.
Donald L. Schmidt, David G. Bogard
openaire +1 more source
Numerical analysis and design optimization on full coverage film-cooling for turbine guided vane
Engineering Applications of Computational Fluid Mechanics, 2022 Based on numerical simulations, the heat transfer and flow field of a turbine vane are analyzed and the film cooling is improved. The optimization objective is increasing the overall cooling effectiveness with cascade pressure loss factors staying almost
Mingrui Wang +5 more
doaj +1 more source
Effects of Surface Roughness on Film Cooling [PDF]
Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, 1996 A flat plate test section was used to study how surface roughness representative of an in-service turbine affects the film cooling adiabatic effectiveness and heat transfer coefficient for a round hole geometry. The injection was from a single row of round film cooling holes with injection angle of 30°.
Donald L. Schmidt +2 more
openaire +1 more source
Numerical study of effusion cooling on an adiabatic flat plate
Propulsion and Power Research, 2013 The present study aims to investigate the effectiveness of effusion film cooling on an adiabatic flat plate. Cylindrical holes of 30° inclination are used for supplying cold air to the hot primary flow. A non-dimensional parameter called the film cooling
Reaz Hasan, Agin Puthukkudi
doaj +1 more source
Effects of plasma actuation and hole configuration on film cooling performance
Propulsion and Power Research, 2023 In this paper, plasma actuators are arranged asymmetrically downstream the wall to improve film cooling performance. Effects of blowing ratio, hole configuration and applied voltage on flow characteristics and film cooling effectiveness were investigated
Jie Sun +4 more
doaj +1 more source
Machines, 2023 The jet always sweeps to the leftmost and rightmost points in the sweeping jet and film composite cooling (SJF) process, resulting in a different coolant flow in each film hole. The film can not easily cover the outer surface evenly under the scouring of
Xiangcan Kong +5 more
doaj +1 more source