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Journal of Visualization

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01-06-2011 | Regular Paper

Unsteady surface signature of a pulsed vortex generator jet

Authors: Kevin J. Disotell, James W. Gregory

Published in: Journal of Visualization | Issue 2/2011

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Abstract

Porous pressure-sensitive paint (PSP) is employed as a visualization technique for unsteady flow features on a low-pressure turbine blade. Recognizing that the measurement of high-frequency pressure fluctuations in unsteady flows—especially in turbomachinery—has proven to be difficult, recent advancements in the development of porous PSP have enabled the high-resolution measurement of pressure fields with frequency content of at least 20 kHz. In this work, PSP is applied to an L1A low-pressure turbine blade section (Re = 20,000 based on axial chord) to visualize the surface dynamics of a vortex generator jet (VGJ) pulsed at 10.6 Hz with nitrogen gas. Intensity-based, time-resolved PSP measurements reveal the development and the surface structure of the VGJ as well as the spanwise variation in the blowing profile.

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Title: Unsteady surface signature of a pulsed vortex generator jet
Authors: Kevin J. Disotell
James W. Gregory
Publication date: 01-06-2011
Publisher: Springer-Verlag
Published in: Journal of Visualization / Issue 2/2011
Print ISSN: 1343-8875
Electronic ISSN: 1875-8975
DOI: https://doi.org/10.1007/s12650-011-0080-3

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Abstract

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