Accession Number:

AD0876551

Title:

Theoretical Investigation of the Switching Mechanism in a Bistable Wall Attachment Fluid Amplifier.

Descriptive Note:

Technical rept.,

Corporate Author:

STANFORD UNIV CA DESIGN DIV

Personal Author(s):

Report Date:

1970-10-01

Pagination or Media Count:

180.0

Abstract:

A theory based on turbulent jet entrainment properties is presented for the prediction of unsteady end wall switching behavior in a bistable wall attachment fluid amplifier. Good agreement is obtained between theoretically predicted switching times and experimental results. The analysis also indicates the experimentally observed dwell phenomena and computed dwell times compare well with reported experimental values. The theoretical model based on a quasi-steady-state treatment of the unsteady, incompressible, two-dimensional flow is shown to be capable of correctly predicting the switching time and demonstrating the dwell phenomena in an amplifier with supply nozzle aspect ratio of 1.0 where only one steady state parameter, such as the jet spread parameter or any reattachment distance with or without control flow, is required for the computations. Included is a complete set of computation procedures and a computer program for the solution of the end wall switching transient. Author

Subject Categories:

  • Fluidics and Fluerics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE