The transition-piece of a gas turbine engine is subjected to high thermal loads as it collects high temperature combustion products from the gas generator to a turbine. This generally produces high thermal stress levels in the casing of the transition piece, strongly limiting its life expectations and making it one of the most critical components of the entire engine. The reliable prediction of such thermal loads is hence a crucial aspect to increase the transition-piece life span and to assure safe operations. The present study aims to investigate the aerothermal behavior of a gas turbine engine transition-piece and in particular to evaluate working temperatures of the casing in relation to the flow and heat transfer situation inside and outside the transition-piece. Typical operating conditions are considered to determine the amount of heat transfer from the gas to the casing by means of computational fluid dynamics (CFD). Both conjugate approach and wall fixed temperature have been considered to compute the heat transfer coefficient (HTC), and more in general, the transition-piece thermal loads. Finally a discussion on the most convenient HTC expression is provided

Thermofluid Dynamic Analysis of a Gas Turbine Transition-Piece / Riccardo Da Soghe;Cosimo Bianchini;Antonio Andreini;Lorenzo Mazzei;Giovanni Riccio;Alessandro Marini;Alessandro Ciani. - In: JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. - ISSN 0742-4795. - ELETTRONICO. - 137:(2015), pp. 062602-062611. [10.1115/1.4028869]

Thermofluid Dynamic Analysis of a Gas Turbine Transition-Piece

DA SOGHE, RICCARDO;BIANCHINI, COSIMO;ANDREINI, ANTONIO;MAZZEI, LORENZO;
2015

Abstract

The transition-piece of a gas turbine engine is subjected to high thermal loads as it collects high temperature combustion products from the gas generator to a turbine. This generally produces high thermal stress levels in the casing of the transition piece, strongly limiting its life expectations and making it one of the most critical components of the entire engine. The reliable prediction of such thermal loads is hence a crucial aspect to increase the transition-piece life span and to assure safe operations. The present study aims to investigate the aerothermal behavior of a gas turbine engine transition-piece and in particular to evaluate working temperatures of the casing in relation to the flow and heat transfer situation inside and outside the transition-piece. Typical operating conditions are considered to determine the amount of heat transfer from the gas to the casing by means of computational fluid dynamics (CFD). Both conjugate approach and wall fixed temperature have been considered to compute the heat transfer coefficient (HTC), and more in general, the transition-piece thermal loads. Finally a discussion on the most convenient HTC expression is provided
2015
137
062602
062611
Riccardo Da Soghe;Cosimo Bianchini;Antonio Andreini;Lorenzo Mazzei;Giovanni Riccio;Alessandro Marini;Alessandro Ciani
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/949159
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