Results 211 to 220 of about 5,265 (262)

Review of Turbine Cooling Technologies

Journal of Engineering for Gas Turbines and Power, 2023
Abstract Modern gas turbines operate in very demanding thermomechanical conditions. The operating temperatures are typically higher than material capability, which requires the parts to be cooled. This work aims to provide a concise overview of the current cooling methods and heat transfer mechanisms occurring in modern gas turbines ...
Dariusz Olczak, Maciej Jaworski
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Defining the Efficiency of a Cooled Turbine

Journal of Turbomachinery, 2006
Abstract Despite 40 years development of gas turbine cooling technology, there is no general agreement on the most appropriate definition of cooled turbine efficiency; the critical issue is the choice of a hypothetical “ideal” process.
J. B. Young, J. H. Horlock
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Calculations of Cooled Turbine Efficiency

Journal of Engineering for Gas Turbines and Power, 2006
The efficiency of a cooled turbine stage has been discussed in the literature. All proposed definitions compare the actual power output with an ideal output, which has to be determined; but usually, one of two definitions has been used by turbine designers. In the first, the so-called Hartsel efficiency, the mainstream gas flow, and the various coolant
J. H. Horlock, Leonardo Torbidoni
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COOLING OF TURBINE ENGINES IN HELICOPTERS

2021
<div class="section abstract"> <div class="htmlview paragraph">A tested method of data presentation and use is described herein. The method shown is a useful guide, to be used with care and to be improved with use.</div></div>
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Scale Cooling -- A Novel Fractal Cooling Structure for Turbine Vanes

Volume 13: Heat Transfer: General Interest / Additive Manufacturing Impacts on Heat Transfer; Wind Energy
Abstract Additive manufacturing technology provides the possibility of more efficient turbine cooling structures. In this work, a novel structure for turbine air-cooled vane based on fractal structure, named Scale Cooling Structure, was proposed.
Zhongran Chi, Longfei Wang
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The Transpiration-Cooled Gas Turbine

Journal of Engineering for Power, 1970
This paper describes a program of experimental and analytical research designed to evaluate the aerodynamic and thermodynamic performance of transpiration-cooled porous surfaces in the high-temperature gas turbine. The aerodynamic penalties of effusing coolant through a set of nozzle blades are shown to be small, particularly when compared with the ...
F. J. Bayley, A. B. Turner
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Gas Turbine Film Cooling

Journal of Propulsion and Power, 2006
The durability of gas turbine engines is strongly dependent on the component temperatures. For the combustor and turbine airfoils and endwalls, film cooling is used extensively to reduce component temperatures. Film cooling is a cooling method used in virtually all of today's aircraft turbine engines and in many power-generation turbine engines and yet
D. G. Bogard, K. A. Thole
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The Prospects of Liquid Cooling for Turbines

SAE Technical Paper Series, 1977
<div class="htmlview paragraph">A critical assessment of the future of liquid cooling is presented. Following a careful comparison of advantages and disadvantages, the principal historical milestones in turbine liquid cooling research are reported.
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Wind turbine cooling technologies

2010
With the increase of the unit capacity of wind turbines, the heat produced by different components rise signifi cantly. Effective cooling methods should be adopted in developing larger power wind turbine. In this chapter, the operating principle and main structure of wind turbines are fi rstly described, following with the analysis of heat production ...
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A critical review on gas turbine cooling performance and failure analysis of turbine blades

International Journal of Thermofluids, 2023
M Monjurul Ehsan, Morium Mannan Tonni
exaly