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Study of Gas Turbine Blade Impingement Cooling

Mohamad Gazali, Mohamed Zafir (2009) Study of Gas Turbine Blade Impingement Cooling. Universiti Teknologi Petronas. (Unpublished)

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Abstract

Gas turbine engines are being used in most of land based power plant. The increasing demand for energy has lead scientists and researchers to enhance the performance of the gas turbine engines. High turbine inlet temperatures are required to obtain high thermal efficiency and thus higher power output can be produced. Turbine blade could experience high thermal stress due to limitation of its material physical properties. A lot of studies had been carried out to solve this problem such as by developing new material for turbine blade. One of the most effective solutions is to introduce the cooling process in the turbine blade itself. The main focus of this project is to study the heat transfer and temperature profile along the turbine blade surface while the blade is cooled internally (impingement cooling). To observe the cooling process in the gas turbine, a turbine blade geometry model has been created using preprocessor software called GAMBIT. FLUENT software is used to simulate the cooling process of the turbine blade. The simulation result is finally being validated by using published data. The results comprise of the temperature distribution along the surface ofthe turbine blade and the temperature distribution on the surface of cooling passages. Temperature distribution on the previously mentioned surfaces can be studied by observing the temperature contour which is generated by FLUENT. The turbine blade is convectively cooled by the compressed air that is bled from the fourteenth stage compressor. It is indicated that the temperature of the turbine blade in the hot gas mainstream has been decreased during operation. This research has proven that the cooling process of the turbine blade occurs by the presence of the cooling air which flows through the cooling passages.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Materials - Engineering materials - Metals alloys - Phase transformation
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 22 Oct 2013 09:20
Last Modified: 25 Jan 2017 09:44
URI: http://utpedia.utp.edu.my/id/eprint/8939

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