Heat Transfer Coefficients on the Squealer Tip and Near-Tip Regions of a Gas Turbine Blade With Single or Double SquealerSource: Journal of Turbomachinery:;2003:;volume( 125 ):;issue: 004::page 778Author:C. Pang Lee
,
Ronald S. Bunker
,
Robert Boyle
,
Jae Su Kwak
,
Jaeyong Ahn
,
Raymond Gaugler
,
Je-Chin Han
DOI: 10.1115/1.1626684Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Detailed heat transfer coefficient distributions on a gas turbine squealer tip blade were measured using a hue detection based transient liquid-crystals technique. The heat transfer coefficients on the shroud and near tip regions of the pressure and suction sides of a blade were also measured. Squealer rims were located along (a) the camber line, (b) the pressure side, (c) the suction side, (d) the pressure and suction sides, (e) the camber line and the pressure side, and (f) the camber line and the suction side, respectively. Tests were performed on a five-bladed linear cascade with a blow down facility. The Reynolds number based on the cascade exit velocity and the axial chord length of a blade was 1.1×106 and the overall pressure ratio was 1.2. Heat transfer measurements were taken at the three tip gap clearances of 1.0%, 1.5%, and 2.5% of blade span. Results show that the heat transfer coefficients on the blade tip and the shroud were significantly reduced by using a squealer tip blade. Results also showed that a different squealer geometry arrangement changed the leakage flow path and resulted in different heat transfer coefficient distributions. The suction side squealer tip provided the lowest heat transfer coefficient on the blade tip and near tip regions compared to the other squealer geometry arrangements.
keyword(s): Pressure , Suction , Blades , Heat transfer coefficients , Gas turbines , Heat transfer AND Liquid crystals ,
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contributor author | C. Pang Lee | |
contributor author | Ronald S. Bunker | |
contributor author | Robert Boyle | |
contributor author | Jae Su Kwak | |
contributor author | Jaeyong Ahn | |
contributor author | Raymond Gaugler | |
contributor author | Je-Chin Han | |
date accessioned | 2017-05-09T00:11:38Z | |
date available | 2017-05-09T00:11:38Z | |
date copyright | October, 2003 | |
date issued | 2003 | |
identifier issn | 0889-504X | |
identifier other | JOTUEI-28706#778_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/129232 | |
description abstract | Detailed heat transfer coefficient distributions on a gas turbine squealer tip blade were measured using a hue detection based transient liquid-crystals technique. The heat transfer coefficients on the shroud and near tip regions of the pressure and suction sides of a blade were also measured. Squealer rims were located along (a) the camber line, (b) the pressure side, (c) the suction side, (d) the pressure and suction sides, (e) the camber line and the pressure side, and (f) the camber line and the suction side, respectively. Tests were performed on a five-bladed linear cascade with a blow down facility. The Reynolds number based on the cascade exit velocity and the axial chord length of a blade was 1.1×106 and the overall pressure ratio was 1.2. Heat transfer measurements were taken at the three tip gap clearances of 1.0%, 1.5%, and 2.5% of blade span. Results show that the heat transfer coefficients on the blade tip and the shroud were significantly reduced by using a squealer tip blade. Results also showed that a different squealer geometry arrangement changed the leakage flow path and resulted in different heat transfer coefficient distributions. The suction side squealer tip provided the lowest heat transfer coefficient on the blade tip and near tip regions compared to the other squealer geometry arrangements. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Heat Transfer Coefficients on the Squealer Tip and Near-Tip Regions of a Gas Turbine Blade With Single or Double Squealer | |
type | Journal Paper | |
journal volume | 125 | |
journal issue | 4 | |
journal title | Journal of Turbomachinery | |
identifier doi | 10.1115/1.1626684 | |
journal fristpage | 778 | |
journal lastpage | 787 | |
identifier eissn | 1528-8900 | |
keywords | Pressure | |
keywords | Suction | |
keywords | Blades | |
keywords | Heat transfer coefficients | |
keywords | Gas turbines | |
keywords | Heat transfer AND Liquid crystals | |
tree | Journal of Turbomachinery:;2003:;volume( 125 ):;issue: 004 | |
contenttype | Fulltext |