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Separated Flow Surface Pressure Fluctuations and Pressure-Velocity Correlations on Prolate Spheroid

Authors: Michael C. Goody; Roger L. Simpson; Christopher J. Chesnakas;

Separated Flow Surface Pressure Fluctuations and Pressure-Velocity Correlations on Prolate Spheroid

Abstract

Power spectra of turbulent surface pressure fluctuations and spatial correlation coefficients of surface pressure-velocity are presented for the leeside, three-dimensional, separated crossflow over a 6:1 prolate spheroid at Re L = 4.2 × 106 for angles of attack of 10 and 20 deg. This is a complex, three-dimensional, nonequilibrium flow of practical interest. These results are related to the attached, separated, and reattached features of the vortical flow for a range of Reynolds numbers based on momentum thickness up to 1.5 × 10 4 . The high-frequency surface pressure fluctuation spectra scale on wall variables at low angle of attack. Near regions of separation where wall shear stress is low, there is little high-frequency content, whcreas low-frequency contributions from the outer layer are relatively large. In regions with large surface shearing stresses, the wall region produces strong, high-frequency spectral content. At locations with relatively small outer region mean velocity gradients, there are smaller low-frequency contributions. Both of these features occur around the side of the body and under the large vortices at higher angle of attack

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
23
Top 10%
Top 10%
Average
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