https://scholars.lib.ntu.edu.tw/handle/123456789/611879
Title: | Unsteady loss in a high pressure turbine stage | Authors: | Payne S.J. Ainsworth R.W. Miller R.J. Moss R.W. Harvey N.W. STEPHEN JOHN PAYNE |
Keywords: | Entropy;High pressure effects;Numerical methods;Rotors;High pressure turbines;Turbines;fan;Heat transfer;high pressure;turbine;Turbulence;Unsteady flow | Issue Date: | 2003 | Journal Volume: | 24 | Journal Issue: | 5 | Start page/Pages: | 698-708 | Source: | International Journal of Heat and Fluid Flow | Abstract: | An investigation into the unsteady losses in a high pressure turbine stage has been performed experimentally at engine-representative conditions. This has been done by making time-resolved measurements of entropy at stage exit at all vane and rotor-relative positions over a wide range of radial height. Due to the considerable difficulty of obtaining accurate measurements at engine-representative conditions, these measurements provide a unique set of experimental data. Five distinct flow features have been identified and their effects on the stage efficiency estimated, showing good overall agreement with an independent efficiency measurement. Comparisons with a particular numerical prediction of the flow field, Unstrest, have shown very good agreement in both the flow structure and the entropy generation. Only the rotor dependence of the loss mechanisms is examined here: the vane dependence will be presented in a subsequent paper. ? 2003 Elsevier Inc. All rights reserved. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0041783922&doi=10.1016%2fS0142-727X%2803%2900027-4&partnerID=40&md5=19c0e3e63746df7ac474f03b8f691f1b https://scholars.lib.ntu.edu.tw/handle/123456789/611879 |
DOI: | 10.1016/S0142-727X(03)00027-4 |
Appears in Collections: | 應用力學研究所 |
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