Local Heat Transfer Measurements on a Rotating Flat Blade Model with a Single Film Hole

Xu, Guoqiang, Yang, Bin, Tao, Zhi, Zhao, Zhenming and Wu, Hongwei (2009) Local Heat Transfer Measurements on a Rotating Flat Blade Model with a Single Film Hole. Progress in Natural Science: Materials International, 19 (3). pp. 321-330. ISSN 1002-0071

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Official URL: http://dx.doi.org/10.1016/j.pnsc.2008.05.031

Abstract

An experimental study was performed to measure the heat transfer coefficient distributions on a flat blade model under rotating operating conditions. A steady-state thermochromic liquid crystal technique was employed to measure the surface temperature, and all the signals from the rotating reference frame were collected by the telemetering instrument via a wireless connection. Both air and CO2 were used as coolant. Results show that the rotational effect has a significant influence on the heat transfer coefficient distributions. The profiles of hg/h0, which is the ratio of heat transfer coefficient with film cooling to that without film cooling, deflect towards the high-radius locations on both the pressure surface and suction surface as the rotation number (Rt) increases, and the deflective tendency is more evident on the suction surface. The variations in mainstream Reynolds number (ReD) and blowing ratio (M) present different distributions of hg/h0 on the pressure and suction surfaces, respectively. Furthermore, the coolant used for CO2 injection is prone to result in lower heat transfer coefficients.

Item Type: Article
Uncontrolled Keywords: Film cooling; Heat transfer; Flat blade; Rotating
Subjects: H100 General Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Hongwei Wu
Date Deposited: 20 Nov 2015 15:03
Last Modified: 10 May 2017 04:05
URI: http://nrl.northumbria.ac.uk/id/eprint/24630

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