A Study of Flow Fields in Bistable Fluid Amplifiers. Part 1. Experimental Investigation.

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Abstract:

The three-dimensional nature of the flow fields in planar nozzles and wall jets found in bistable fluid amplifiers was investigated. Detailed total pressure measurements were made at the exit plane of nozzles having convex wall curvature for cases with flow supplied perpendicular and parallel to the nozzle exit flow direction. Significant low total pressure regions in the corners of the nozzles caused by sidewall boundary layer cross-flow in the vicinity of the convex nozzle walls were found in both cases. Midplane total pressure loss regions were found in the parallel supply flow case only. They were produced by secondary flows generated at the transition from round to rectangular flow area at the nozzle inlet. Author

Author(s):
Wagner, W. Barry ; Owczarek, Jerzy A.
Author Organization(s):
LEHIGH UNIV BETHLEHEM PA DEPT OF MECHANICAL ENGINEERING AND MECHANICS
Descriptive Note:
Technical rept.,
Supplementary Note:
Report on Fluid Amplifiers. See also AD-751 606.
Pagination:
0217

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
THEMIS-LU-TR-9
Contract/Grant Number(s):
N00014-69-A-0417
 Subject Terms
Communities of Interest:
Air Platforms
Descriptor(s):
*FLUID AMPLIFIERS, FLOW FIELDS, FLUIDICS, JET MIXING FLOW, COANDA EFFECT, FLOW SEPARATION, NOZZLE GAS FLOW, BOUNDARY LAYER CONTROL, MATHEMATICAL MODELS
Field(s)/Group(s):
Fluidics and Fluerics
Keyword(s):
BISTABLE FLUID AMPLIFIERS, *FLUERICS, THEMIS PROJECT
Report Date:
1972 Jun 01