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The influence of turbulence on wake dispersion and blade row interaction in an axial compressor


Henderson, AD and Walker, GJ and Hughes, JD, The influence of turbulence on wake dispersion and blade row interaction in an axial compressor, Journal of Turbomachinery, Transactions of the ASME, 128, (1) pp. 150-157. ISSN 0889-504X (2006) [Refereed Article]

DOI: doi:10.1115/1.2098809


The influence of free-stream turbulence on wake dispersion and boundary layer transition processes has been studied in a 1.5-stage axial compressor. An inlet grid was used to produce turbulence characteristics typical of an embedded stage in a multistage machine. The grid turbulence strongly enhanced the dispersion of inlet guide vane (IGV) wakes. This modified the interaction of IGV and rotor wakes, leading to a significant decrease in periodic unsteadiness experienced by the downstream stator. These observations have important implications for the prediction of clocking effects in multistage machines. Boundary layer transition characteristics on the outlet stator were studied with a surface hot-film array. Observations with grid turbulence were compared with those for the natural low turbulence inflow to the machine. The transition behavior under low turbulence inflow conditions with the stator blade element immersed in the dispersed IGV wakes closely resembled the behavior with elevated grid turbulence. It is concluded that with appropriate alignment, the blade element behavior in a 1.5-stage axial machine can reliably indicate the blade element behavior of an embedded row in a multistage machine. Copyright © 2006 by ASME.

Item Details

Item Type:Refereed Article
Research Division:Engineering
Research Group:Aerospace engineering
Research Field:Aerospace engineering not elsewhere classified
Objective Division:Transport
Objective Group:Aerospace transport
Objective Field:Air safety and traffic management
UTAS Author:Henderson, AD (Associate Professor Alan Henderson)
UTAS Author:Walker, GJ (Professor Greg Walker)
ID Code:40533
Year Published:2006
Web of Science® Times Cited:19
Deposited By:Engineering
Deposited On:2006-08-01
Last Modified:2009-08-19

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