Results 281 to 290 of about 98,917 (314)

The Effect of Freestream Turbulence on Film Cooling Adiabatic Effectiveness

Volume 3: Turbo Expo 2002, Parts A and B, 2002
The film-cooling performance of a flat plate in the presence of low and high freestream turbulence is investigated using liquid crystal thermography. High-resolution distributions of the adiabatic effectiveness are determined over the film-cooled surface of the flat plate using the hue method and image processing.
James E Mayhew, James W Baughn, Aaron R Byerley   +2 more
openaire   +1 more source

Experimental Evaluation of Large Spacing Compound Angle Full Coverage Film Cooling Arrays: Adiabatic Film-Cooling Effectiveness

Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat and, 2012
Adiabatic film cooling effectiveness contours are obtained experimentally with the use of temperature sensitive paint (TSP) on low thermal conductivity film cooled surfaces. The effects of blowing ratio, surface angle, and hole spacing are observed by testing four full-coverage arrays composed of cylindrical staggered holes all compounded at 45 deg ...
Greg Natsui, Roberto Claretti, Mark A. Ricklick, Jayanta S. Kapat, Michael E. Crawford, Glenn Brown, Kenneth Landis   +6 more
openaire   +3 more sources

Film cooling effectiveness in hypersonic turbulent flow

AIAA Journal, 1970
Film cooling effectiveness in hypersonic turbulent flow from downstream surface equilibrium temperature ...
AUBREY M. CARY, JERRY N. HEFNER
openaire   +1 more source

Enhanced Film Cooling Effectiveness With Surface Trenches

Volume 3B: Heat Transfer, 2013
In this study, cylindrical and fan shaped film cooling holes are evaluated on the blade surface numerically, using the Computational Fluid Dynamics (CFD) tool ANSYS-CFX, with the objective of improving cooling effectiveness by understanding the flow pattern at the cooling hole exit.
K. Vighneswara Rao, Jong S. Liu, Daniel C. Crites, Luis A. Tapia, Malak F. Malak, G. Sujatha, S. Balamurugan   +6 more
openaire   +1 more source

Cooling Effectiveness on Film Cooled Turbine Blades

Heat Transfer: Volume 5 — Computational, Aerospace and Environmental Heat Transfer, 2001
Abstract This paper presents experiments on the cooling effectiveness obtained for two different injection locations on the suction side of a turbine blade at transonic flow conditions. Previous results of a computational analysis and flow visualization indicated that a separation bubble is present on the suction side at a location x/L =
M. Derrar, J. Nagler, W. W. Koschel
openaire   +1 more source

The Effect of High Free-Stream Turbulence on Film Cooling Effectiveness

Journal of Turbomachinery, 1994
This study investigated the adiabatic wall cooling effectiveness of a single row of film cooling holes injecting into a turbulent flat plate boundary layer below a turbulent, zero pressure gradient free stream. Levels of free-stream turbulence (Tu) up to 17.4 percent were generated using a method that simulates conditions at a gas turbine combustor ...
Jeffrey P. Bons, Charles D. MacArthur, Richard B. Rivir   +2 more
openaire   +1 more source

Film Cooling Effectiveness in High-Turbulence Flow

Journal of Turbomachinery, 1991
The mechanisms influencing film cooling effectiveness on a flat plate in high free-stream turbulence using a single row of 30 deg slant-hole injectors are examined. The primary area of focus is the area within 40 diameters downstream of injection. Of interest are blowing ratios for optimum film cooling effectiveness within 10 diameters downstream of ...
G. W. Jumper, W. C. Elrod, R. B. Rivir
openaire   +1 more source

Effects of Jet Geometries on Film-cooling Effectiveness

2007
Numerical simulations based on control volume method and RNG k-e turbulence model were performed to investigate the flow and heat transfer characteristics of the flat plate film cooling, squirting out from a cone-shaped jet orifice with a diffuser angle of γ to be 300 and a round-shaped jet orifice respectively.
Ling Zhang, Tingting Guo, Shaohua Li, Jianhong Liu   +3 more
openaire   +1 more source

Effect of Streamline Curvature on Film Cooling

Journal of Engineering for Power, 1977
The effects of streamline curvature on film cooling effectiveness are discussed. Experiments for air discharged through a slot and into a turbulent boundary layer along a flat, convex, and concave surface are described. Adiabatic wall effectiveness measurements on each surface for several blowing rates are presented.
R. E. Mayle, F. C. Kopper, M. F. Blair, D. A. Bailey   +3 more
openaire   +1 more source

New Techniques for Measuring Film Cooling Effectiveness

Journal of Heat Transfer, 1975
Techniques to measure local film effectiveness distributions on large-scale models of turbine blade and vane sections were developed for use in subsonic, room-temperature wind-tunnel environments. Highly detailed film cooling effectiveness distributions were obtained on near-adiabatic, cast rigid foam test models using infrared radiometer scanning ...
M. F. Blair, R. D. Lander
openaire   +1 more source