The effect of reynolds number, compressibility and free stream turbulence on profile entropy generation rate

Philip C. Griffin; Francis K. O'Donnell; Mark R.D. Davies; Ed Walsh

doi:10.1115/GT2002-30330

The effect of reynolds number, compressibility and free stream turbulence on profile entropy generation rate

Philip C. Griffin, Francis K. O'Donnell, Mark R.D. Davies, Ed Walsh

School of Engineering

University of Limerick

Research output: Contribution to conference › Paper › peer-review

Abstract

Detailed aerodynamic data from the suction surface boundary layer on a turbine blade arranged in a linear subsonic cascade was acquired under high free stream turbulence conditions generated using a perforated plate placed upstream of the cascade. Thus, further analysis elucidated the presence of fluctuating components of velocity in the laminar boundary layer and were attributed to the effects of the free stream turbulence. This lead to the notion of a hybrid boundary layer, possessing both laminar and turbulent characteristics. These findings have implications regarding the profile loss of the blade, that was the loss generated in blade boundary layers and wakes normally associated with phenomena.

Original language	English
Pages	61-69
Number of pages	9
DOIs	https://doi.org/10.1115/GT2002-30330
Publication status	Published - 2002
Event	Proceedings of the ASME TURBO EXPO 2002: Turbomachinery - Amsterdam, Netherlands Duration: 3 Jun 2002 → 6 Jun 2002

Conference

Conference	Proceedings of the ASME TURBO EXPO 2002: Turbomachinery
Country/Territory	Netherlands
City	Amsterdam
Period	3/06/02 → 6/06/02

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10.1115/GT2002-30330

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title = "The effect of reynolds number, compressibility and free stream turbulence on profile entropy generation rate",

abstract = "Detailed aerodynamic data from the suction surface boundary layer on a turbine blade arranged in a linear subsonic cascade was acquired under high free stream turbulence conditions generated using a perforated plate placed upstream of the cascade. Thus, further analysis elucidated the presence of fluctuating components of velocity in the laminar boundary layer and were attributed to the effects of the free stream turbulence. This lead to the notion of a hybrid boundary layer, possessing both laminar and turbulent characteristics. These findings have implications regarding the profile loss of the blade, that was the loss generated in blade boundary layers and wakes normally associated with phenomena.",

author = "Griffin, {Philip C.} and O'Donnell, {Francis K.} and Davies, {Mark R.D.} and Ed Walsh",

year = "2002",

doi = "10.1115/GT2002-30330",

language = "English",

pages = "61--69",

note = "Proceedings of the ASME TURBO EXPO 2002: Turbomachinery ; Conference date: 03-06-2002 Through 06-06-2002",

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AU - Griffin, Philip C.

AU - O'Donnell, Francis K.

AU - Davies, Mark R.D.

AU - Walsh, Ed

PY - 2002

Y1 - 2002

N2 - Detailed aerodynamic data from the suction surface boundary layer on a turbine blade arranged in a linear subsonic cascade was acquired under high free stream turbulence conditions generated using a perforated plate placed upstream of the cascade. Thus, further analysis elucidated the presence of fluctuating components of velocity in the laminar boundary layer and were attributed to the effects of the free stream turbulence. This lead to the notion of a hybrid boundary layer, possessing both laminar and turbulent characteristics. These findings have implications regarding the profile loss of the blade, that was the loss generated in blade boundary layers and wakes normally associated with phenomena.

AB - Detailed aerodynamic data from the suction surface boundary layer on a turbine blade arranged in a linear subsonic cascade was acquired under high free stream turbulence conditions generated using a perforated plate placed upstream of the cascade. Thus, further analysis elucidated the presence of fluctuating components of velocity in the laminar boundary layer and were attributed to the effects of the free stream turbulence. This lead to the notion of a hybrid boundary layer, possessing both laminar and turbulent characteristics. These findings have implications regarding the profile loss of the blade, that was the loss generated in blade boundary layers and wakes normally associated with phenomena.

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U2 - 10.1115/GT2002-30330

DO - 10.1115/GT2002-30330

M3 - Paper

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T2 - Proceedings of the ASME TURBO EXPO 2002: Turbomachinery

Y2 - 3 June 2002 through 6 June 2002

ER -

The effect of reynolds number, compressibility and free stream turbulence on profile entropy generation rate

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