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Flow through very porous screensFlow through and around screens with small resistance coefficient were analyzed. Both steady and oscillatory flows are considered, however, the case of a screen normal to the flow is treated. At second order in the asymptotic expansion the steady flow normal to the screen is nonuniform along the screen, due to components induced by the wake and by tangential drag. The third order pressure drop is nonuniform and the wake contains distributed vorticity, in addition to the vortex sheet along its boundary. The unsteady drag coefficient is found as a function of frequency.
Document ID
19850011960
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Durbin, P. A. (North American Aviation, Inc. Torrance, CA, United States)
Muramoto, K. K. (North American Aviation, Inc. Torrance, CA, United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1985
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
E-2360
NAS 1.60:2436
NASA-TP-2436
Accession Number
85N20270
Funding Number(s)
PROJECT: RTOP 505-31-38
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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