Effect of Cooling Injection on Transonic Tip Flows

In this paper, the effect of cooling injection on the aerodynamics of tip flows in transonic turbines is investigated. Experiments are performed using an idealized model of a transonic tip flow. Schlieren photography, probe, and surface pressure measurements are used to determine the transonic tip f...

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Bibliographic Details
Published in:Journal of propulsion and power 2013-11, Vol.29 (6), p.1374-1381
Main Authors: Wheeler, Andrew P. S, Saleh, Zainab
Format: Article
Language:English
Subjects:
Computation
Computer simulation
Cooling
Cooling effects
Leakage
Pressure
Schlieren photography
Surface pressure
Transonic flow
Turbines
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Summary:In this paper, the effect of cooling injection on the aerodynamics of tip flows in transonic turbines is investigated. Experiments are performed using an idealized model of a transonic tip flow. Schlieren photography, probe, and surface pressure measurements are used to determine the transonic tip flow structure and to validate the computational method. Computational simulations are performed to investigate the effects of cooling injection in a transonic blade environment. The results show that cooling injection has the potential to reduce overtip leakage loss.
ISSN:0748-4658
1533-3876
DOI:10.2514/1.B34657