Publication:
Atmospheric dispersion of high velocity jets

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Authors
Brendmoen, Jack V.
Netzer, David W.
Subjects
Air Pollution
Jet Dispersion
Advisors
Date of Issue
1979-02
Date
1979-02
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A neutrally stable atmospheric surface layer was simulated in a low speed wind tunnel by tripping the boundary layer with a fence and letting the turbulent flow develop over a length of roughness elements. Turbojet exhaust dispersion characteristics, simulated by a burner/nozzle system, were investigated by measuring the horizontal and vertical temperature profiles at axial stations downwind from the nozzle exit. Dispersion sensitivity to different nozzle exit conditions, angles of incidence to the wind, and nozzle surface blockage were investigated. The results were compared to dispersion methods used in the Air Quality Assessment Model (AQAM). It was found that (1) the experimental jet penetration length was much shorter than that assumed in AQAM, (2) the horizontal jet exhibited plume rise, (3) the initial dispersion coefficients were a function of wind direction, and (4) the plume spreading rate was more rapid than for the low velocity, elevated sources in neutrally stable atmospheric conditions. (Author)
Type
Technical Report
Description
Series/Report No
Department
Identifiers
NPS Report Number
NPS-67-79-012
Sponsors
Prepared for: Naval Air Propulsion Center, Trenton, New Jersey 08608.
Funder
N6237679WR00014
Format
ix, 72 p. : ill.
28 cm.
Citation
Distribution Statement
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.
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