CUED Publications database

Investigation of boundary layer development in a multistage LP turbine

Hodson, HP and Huntsman, I and Steele, AB (1993) Investigation of boundary layer development in a multistage LP turbine. American Society of Mechanical Engineers (Paper). pp. 1-9. ISSN 0402-1215

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Abstract

This paper describes an investigation of the behavior of suction surface boundary layers in a modern multistage Low Pressure turbine. An array of eighteen surface-mounted hot-film anemometers was mounted on a stator blade of the third stage of a 4-stage machine. Data were obtained at Reynolds numbers between 0.9 × 105 and 1.8 × 105 and 1.8 × 105. At the majority of the test conditions, wakes from upstream rotors periodically initiated transition at about 40% surface length. In between these events, laminar separation occurred at about 75% surface length. It is inferred that the effect of the wakes on the performance of the bladerow is limited and that steady flow design methods should provide an adequate assessment of LP turbine performance during design.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Turbomachinery
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:28
Last Modified: 27 Nov 2014 19:24
DOI: