... or on the momentum thickness. Heat flux and temperature variations along the surface of a turbine blade may cause significant differences between the shapes and sizes of the velocity and thermal boundary layer profiles. Therefore, correlations are needed which relate the states of both the velocity and thermal...

...C. Camci; B. Gumusel The present study explains a steady-state method of measuring convective heat transfer coefficient on the casing of an axial flow turbine. The goal is to develop an accurate steady-state heat transfer method for the comparison of various casing surface and tip designs used...

...Pedro de la Calzada; Jose Javier Alvarez Impingement cooling through jet holes is a very attractive cooling system for heat rejection at high heat loaded areas as the leading edge of turbine vanes. Although some correlations and tools are available to dimension such systems, the variety...

... Symposium on Transport Phenomena , Hemisphere , Washington, D.C. , pp. 86 – 102 . Aronstein , D. C. , 1994 , “ Effects of Rotation on Impinging Jets for Turbine Cooling ,” Ph.D. thesis, University of Washington, Washington, D.C. Iacovides , H. , Kounadis , D. , Launder , B. E...

...André Burdet; Reza S. Abhari The pulsation of film cooling jets in turbines is driven by the near hole pressure fluctuation caused by the deterministic interaction of stator/rotor blade rows. Jet pulsation is characterized by the coolant near hole reduced frequency Ω c and the pulsation amplitude...

...M. T. Schobeiri; B. Öztürk; M. Kegalj; D. Bensing This paper attempts to provide a detailed insight into the heat transfer and aerodynamic behavior of a separation zone that is generated as a result of boundary layer development along the suction surface of a highly loaded low pressure turbine...

... , T. , 1979 , “ Observations on the Influence of Rotation On Heat Transfer in the Cooling Channels of Gas Turbine Rotor Blades ,” Proc. Inst. Mech. Eng. 0020-3483 , 193 , pp...

...Charles W. Booten; John K. Eaton The inverse discrete Green’s function (IDGF) is a heat transfer coefficient that is valid for arbitrarily complex thermal boundary conditions. It was measured using a rapid experimentation technique in a generic serpentine turbine-blade cooling passage with rib...

...S. Han; R. J. Goldstein An experimental system is designed, constructed, and operated to make local measurements of heat transfer from constant-temperature surfaces in a linear turbine cascade. The system includes a number of embedded heaters and a control system to maintain the turbine blades...

...Aroon K. Viswanathan; Danesh K. Tafti The predictive capability of Detached Eddy Simulations (DES) is investigated in stationary as well as rotating ribbed ducts with relevance to the internal cooling of turbine blades. A number of calculations are presented at Re = 20,000 and rotation numbers...

...P. Razelos 15 02 2005 18 06 2005 hydrodynamics convection thermal resistance turbines blades heat exchangers cooling aerospace engines In this paper the authors present the experimental results of the effects of tip clearance on the thermal and hydrodynamic...

...H. P. Wang; S. J. Olson; R. J. Goldstein The naphthalene sublimation technique is used to investigate the development of Taylor-Go¨rtler vortices over the pressure surface of a simulated high performance turbine blade. Large spanwise variation in mass transfer is observed downstream on the pressure...

...Neil Zuckerman; Noam Lior Uses of impinging jet devices for heat transfer are described, with a focus on cooling applications within turbine systems. Numerical simulation techniques and results are described, and the relative strengths and drawbacks of the k - ε , k - ω , Reynolds stress model...

...Atul Kohli; David G. Bogard This experimental study was performed on a single row of round holes with a 35° surface angle, representing film cooling geometry commonly used in turbine engines. Simultaneous velocity and temperature measurements were made using a cold-wire in conjunction with a LDV...

...J. Bons, Associate Professor The application of Reynolds analogy 2 St / c f ≅ 1 for turbine flows is critically evaluated using experimental data collected in a low-speed wind tunnel. Independent measurements of St and c f over a wide variety of test conditions permit assessments of the variation...

... conducted by: S. Acharya. 27 February 2004 21 October 2004 30 03 2005 pipe flow turbines blades cooling flow simulation turbulence Navier-Stokes equations In order to allow the gas turbine designer to increase the turbine inlet temperature while maintaining...

...Roland S. Muwanga; Sri Sreekanth; Daniel Grigore; Ricardo Trindade; Terry Lucas A probabilistic approach to the thermal design and analysis of cooled turbine blades is presented. Various factors that affect the probabilistic performance of the blade thermal design are grouped into categories...

...G. Medic; P. A. Durbin It is shown how natural and forced unsteadiness play a major role in turbine blade trailing edge cooling flows. Reynolds averaged simulations are presented for a surface jet in coflow, resembling the geometry of the pressure side breakout on a turbine blade. Steady...

...Andrew C. Chambers; David R. H. Gillespie; Peter T. Ireland; Geoffrey M. Dailey Impingement channels are often used in turbine blade cooling configurations. This paper examines the heat transfer performance of a typical integrally cast impingement channel. Detailed heat transfer coefficient...

...Ting Wang; Matthew C. Rice The surface roughness over a serviced turbine airfoil is usually multiscaled with varying features that are difficult to be universally characterized. However, it was previously discovered in low free-stream turbulence conditions that the height of larger roughness...