Li, W., Li, X., Ren, J. and Jiang, H. (2018) Length to diameter ratio effect on heat transfer performance of simple and compound angle holes in thin-wall airfoil cooling. International Journal of Heat and Mass Transfer, 127, pp. 867-879. (doi: 10.1016/j.ijheatmasstransfer.2018.08.086)
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Abstract
Heat transfer coefficients on a flat plate surface downstream a row of simple and compound angle cylindrical holes are investigated using high-resolution thermographic liquid crystal technique. A variation of flow parameters including blowing ratio, and geometry parameters including compound angle and length-to-diameter ratio are examined. Blowing ratios (M) ranging from 0.3 to 2, length to diameter ratios (L/D) from 0.5 to 5, and two compound angle (β: 0°, 45°) are employed composing a test matrix of 70 test cases. Detailed local, spanwise averaged, and area averaged heat transfer coefficients hf/h0 are presented to illustrate the effect of length-to-diameter ratio and compound angle. The film cooling performance is also evaluated using NHFR method and Δφ method by combining adiabatic film effectiveness and heat transfer coefficient data. Results indicate that Δφ method has superiority in evaluating film cooling performance due to its direct reflection of temperature reduction by film protection.
| Item Type: | Articles |
|---|---|
| Additional Information: | The authors would like to acknowledge the financial supports from National Natural Science Foundation of China (No. 51676106 and No. U1613204). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Li, Mr Weihong |
| Authors: | Li, W., Li, X., Ren, J., and Jiang, H. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | International Journal of Heat and Mass Transfer |
| Publisher: | Elsevier |
| ISSN: | 0017-9310 |
| ISSN (Online): | 1879-2189 |
| Published Online: | 25 August 2018 |
| Copyright Holders: | Copyright © 2018 Elsevier Ltd. |
| First Published: | First published in International Journal of Heat and Mass Transfer 127: 867-879 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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