Numerical Investigation of Airfoil Clocking in a Three-Stage Low-Pressure Turbine
Author:
Arnone Andrea1, Marconcini Michele1, Pacciani Roberto1, Schipani Claudia2, Spano Ennio2
Affiliation:
1. “Sergio Stecco” Department of Energy Engineering, University of Florence, 50139 Firenze, Italy 2. Fiat Avio S.p.A.—Direzione Tecnica, 10127 Torino, Italy
Abstract
A quasi-three-dimensional, blade-to-blade, time-accurate, viscous solver was used for a three-stage LP turbine study. Due to the low Reynolds number, transitional computations were performed. Unsteady analyses were then carried out by varying the circumferential relative position of consecutive vanes and blade rows to study the effects of clocking on the turbine’s performance. A clocking strategy developed in order to limit the number of configurations to be analyzed is discussed. The optimum analytically-determined clocking position is illustrated for two different operating conditions, referred to as cruise and takeoff. The effects of clocking on wake interaction mechanisms and unsteady blade loadings is presented and discussed. For low Reynolds number turbine flows, the importance of taking transition into account in clocking analysis is demonstrated by a comparison with a fully turbulent approach.
Publisher
ASME International
Subject
Mechanical Engineering
Reference30 articles.
1. Sharma, O. P., Ni, R. H., and Tanrikut, S., 1994, “Unsteady Flow in Turbines—Impact on Design Procedure,” AGARD Lecture Series 195, Turbomachinery Design Using CFD. 2. Huber, F. W., Johnson, P. D., Sharma, O. P., Staubach, J. B., and Gaddis, S. W., 1996, “Performance Improvement Through Indexing of Turbine Airfoils: Part I—Experimental Investigation,” ASME J. Turbomach., 118, pp. 630–635. 3. Dorney, D. J., and Sharma, O. P., 1996, “A Study of Turbine Performance Increases Through Airfoil Clocking,” AIAA Paper No. 96-2816. 4. Eulitz, F., Engel, K., and Gebing, H., 1996, “Numerical Investigation of the Clocking Effects in a Multistage Turbine,” ASME Paper No. 96-GT-26. 5. Griffin, L. W., Huber, F. W., and Sharma, O. P., 1996, “Performance Improvement Through Indexing of Turbine Airfoils: Part II—Numerical Simulation,” ASME J. Turbomach., 118, pp. 636–642.
Cited by
33 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献
|
|