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Record 1 of 18530
Flow visualization and quantitative velocity and pressure measurements in simulated single and double brush seals
Author and Affiliation:
Braun, M. J.(Akron Univ., Akron, OH, United States)
Canacci, V. A.(Akron, University, OH, United States)
Hendricks, R. C.(NASA Lewis Research Center, Cleveland, OH, United States)
Abstract: A method to visualize and characterize the complex flow fields in simulated single and double brush seals is presented. The brush seal configuration was tested in a gravity fed water tunnel and a pump driven pressurized oil tunnel. Visualization of the flow field revealed regions that are characteristically river jetting, vortical, crossflow and exist upstream, downstream or within the seal. Such flows are especially engendered by variations in fiber void that are spatial and temporal and affect changes in seal leakage and stability. While the effects of interface motion and cylindrical configuration have not been considered herein, it is believed that the observed flow fields and pressure drop patterns characterize flow phenomenology in brush seals. The axial pressure profiles upstream, across and downstream of the brush have been measured under a variety of inlet pressure conditions and the ensuing pressure maps are presented and discussed. Through the application of the Full Flow Field Tracking method developed by the authors, the flow patterns and the accompanying fluid velocities inside the brush were non-intrusively determined and graphically reconstructed.
Publication Date: Jan 01, 1991
Document ID:
19910036448
(Acquired Nov 28, 1995)
Accession Number: 91A21071
Subject Category: MECHANICAL ENGINEERING
Document Type: Journal Article
Publication Information: STLE Tribology Transactions; p. 70-80; (ISSN 0569-8197); 34
Publisher Information: United States
Contract/Grant/Task Num: NAG3-969
Financial Sponsor: NASA; United States
Organization Source: Akron Univ.; Akron, OH, United States
NASA Lewis Research Center; Cleveland, OH, United States
Description: 11p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FLOW VISUALIZATION; PRESSURE MEASUREMENT; SEALS (STOPPERS); VELOCITY MEASUREMENT; FLOW DISTRIBUTION; PRESSURE DROP; TURBOMACHINERY; WATER TUNNEL TESTS
Imprint And Other Notes: (STLE, Annual Meeting, 45th, Denver, CO, May 7-10, 1990) STLE Tribology Transactions (ISSN 0569-8197), vol. 34, Jan. 1991, p. 70-80.
Availability Source: Other Sources
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