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Periodic Transition on an Axial Compressor Stator: Incidence and Clocking Effects: Part I - Experimental Data

Citation

Walker, GJ and Hughes, JD and Solomon, WJ, Periodic Transition on an Axial Compressor Stator: Incidence and Clocking Effects: Part I - Experimental Data, Journal of Turbomachinery - Transactions of the ASME, 121, (3, July 1999) pp. 398-407. ISSN 0889-504X (1999) [Refereed Article]

DOI: doi:10.1115/1.2841332

Abstract

Periodic wake-induced transition on the outlet stator of a 1.5-stage axial compressor is examined using hot-film arrays on both the suction and pressure surfaces. The time-mean surface pressure distribution is varied by changing the blade incidence, while the free-stream disturbance field is altered by clocking of the stator relative to an inlet guide vane row. Ensemble-averaged plots of turbulent intermittency and relaxation factor (extent of calmed flow following the passage of a turbulent spot) are presented. These show the strength of periodic wake-induced transition phenomena to be significantly influenced by both incidence and clocking effects. The nature and extent of transition by other modes (natural, bypass, and separated flow transition) are altered accordingly. Leading edge and midchord separation bubbles are affected in a characteristically different manner by changing free-stream periodicity. There are noticeable differences between suction and pressure surface transition behavior, particularly as regards the strength and extent of calming. In Part II of this paper, the transition onset observations from the compressor stator are used to evaluate the quasi-steady application of conventional transition correlations to predict unsteady transition onset on the blading of an embedded axial compressor stage. © 1999 ASME.

Item Details

Item Type:Refereed Article
Research Division:Engineering
Research Group:Aerospace Engineering
Research Field:Aircraft Performance and Flight Control Systems
Objective Division:Manufacturing
Objective Group:Transport Equipment
Objective Field:Aerospace Equipment
Author:Walker, GJ (Professor Greg Walker)
Author:Hughes, JD (Ms Janet Dilyse Hughes)
ID Code:17293
Year Published:1999
Web of Science® Times Cited:24
Deposited By:Civil and Mechanical Engineering
Deposited On:1999-08-01
Last Modified:2000-05-24
Downloads:0

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