Model tests of multiple nozzle exhaust gas educator systems for gas turbine powered ships.
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Authors
Ellin, Charles Robert
Subjects
multiple nozzle eductor
exhaust gas cooling
exhaust eductor/ejector
air/gas eductor
air/gas ejector
exhaust gas cooling
exhaust eductor/ejector
air/gas eductor
air/gas ejector
Advisors
Pucci, Paul F.
Date of Issue
1977-06
Date
June 1977
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Cold flow model tests of multiple nozzle exhaust gas eductor systems with constant area mixing stacks were conducted to evaluate effects of geometric configuration on eductor performance. A one-dimensional analysis of a simple eductor system based on conservation of momentum for an incompressible gas was used in determining the non-dimensional parameters governing the flow phenomenon. Eductor performance is defined in terms of these parameters. An experimental correlation of these parameters is developed and used to determine the effects of variations in eductor geometry on eductor performance. Three basic eductor configurations were tested with mixing stack L/D between 2.3 and 2.8, mixing stack to nozzle area ratios ranging from 2.28 to 3.03, primary nozzle exit Mach numbers from 0.070 to 0.265 and primary nozzle combinations of three, four and five nozzles each. Within the range of variables considered, the mixing stack area to primary nozzle area ratio and the resistance to secondary air flow into the eductor had the most influence on eductor performance.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
NPS-69Pc77061
Sponsors
Naval Ship Research and Development Laboratory, N00167-76 WR 6-0454
Funder
Naval Ship Research and Development Laboratory, N00167-76 WR 6-0454
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.