CUED Publications database

Development of blade profiles for low pressure turbine applications

Curtis, EM and Hodson, HP and Banieghbal, MR and Denton, JD and Howell, RJ and Harvey, NW (1996) Development of blade profiles for low pressure turbine applications. American Society of Mechanical Engineers (Paper). ISSN 0402-1215

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Abstract

This paper describes a program of work, largely experimental, which was undertaken with the objective of developing an improved blade profile for the low-pressure turbine in aero-engine applications. Preliminary experiments were conducted using a novel technique. An existing cascade of datum blades was modified to enable the pressure distribution on the suction surface of one of the blades to be altered. Various means, such as shaped inserts, an adjustable flap at the trailing edge, and changing stagger were employed to change the geometry of the passage. These experiments provided boundary layer and lift data for a wide range of suction surface pressure distributions. The data was then used as a guide for the development of new blade profiles. The new blade profiles were then investigated in a low-speed cascade that included a set of moving bars upstream of the cascade of blades to simulate the effect of the incoming wakes from the previous blade row in a multistage turbine environment.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Turbomachinery
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:14
Last Modified: 27 Nov 2014 19:22
DOI: