Experimental investigation of thrust augmenting ejectors using vane excited primary jets
Authors
McClellan, Thomas Robert
Subjects
Thrust augmentation
Vane excited jet
Vane excited jet
Advisors
Platzer, Max F.
Date of Issue
1982-03
Date
March 1982
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
An experimental investigation has been conducted to evaluate the entrainment characteristics of a thrust augmenting ejector, with a small, oscillating airfoil inserted in the potential core of the primary jet. Velocity distributions were measured across the width of the jet, at downstream distances of 20 and 40 nozzle widths, with the jet exhausting into still air and with the jet exhausting into an instrumented ejector shroud, for the following range of parameters: Pressure ratio 1.137 and 1. 268, amplitude of oscillation 2.6° and 6.9° zero-to-peak, frequency of oscillation 0, 20, 40 and 60 Hz. Static pressure distributions were measured within the shroud when the
ejector was installed. The results amplify previously conducted studies. Jet spreading and entrainment appear to increase with increasing amplitude and frequency of oscillation and to decrease with increasing nozzle pressure ratio.
Type
Thesis
Description
Series/Report No
Department
Aeronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.