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http://dx.doi.org/10.5139/JKSAS.2016.44.12.1062

Numerical Analysis of Heat Transfer and Flow Characteristics on Squealer Tip of Gas Turbine Blade  

Jiao, Liu (Department of Mechanical Engineering, Hanyang University)
Kang, Youngseok (Korea Aerospace Research Institute)
Kim, Donghwa (Department of Mechanical Engineering, Hanyang University)
Cho, Jinsoo (Department of Mechanical Engineering, Hanyang University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.44, no.12, 2016 , pp. 1062-1070 More about this Journal
Abstract
The heat transfer and flow characteristics of gas turbine blade tip were investigated in this paper by using the conjugate heat transfer analysis. The rotor inlet boundary condition profile which was taken from the first stage nozzle outlet was used to analyse. The profile contained the velocity and temperature information. This study presents the influence of tip clearance about aerodynamic loss, heat transfer coefficient and film cooling effectiveness with the squealer tip designed blade model which tip clearance variation range from 1% to 2.5% of span. Results showed that the aerodynamic loss and the heat transfer coefficient were increased when the tip clearance was increased. Especially when the tip clearance was 2% of the span, the average heat transfer coefficient on the tip region was increased obviously. The film cooling effectiveness of tip region was increasing with decreasing of the tip clearance. There was high film cooling effectiveness at cavity and near tip hole region.
Keywords
Gas Turbine; Cooled Turbine; Tip Clearance; Conjugate Heat Transfer; Heat transfer coefficient; Pressure Loss; Film Cooling Effectiveness;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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