Masters Theses

George Philip

Abstract

"An experimental investigation was conducted for an annular jet which consisted of a circular jet and a concentric wake. The annular air jet mixed with quiescent atmospheric air. The jet velocity was kept constant at 137.0 feet per second which corresponds to a Reynolds Number of 73,200. Using the technique of hot-wire anemometry, mean velocities, turbulence intensities and Reynolds stresses were measured in the longitudinal and lateral directions. Two distinct flow regimes, the free stream jet regime and the diffusing jet regime, are observed. In the free stream jet regime, higher turbulence intensity and shear stress occur in the inner region where the annular jet interacts with the wake. In the diffusing jet regime, higher turbulence intensity and higher turbulent shear occur in the outer mixing region where the annular jet interacts with the quiescent air. In both regimes, high turbulence intensities and Reynolds stresses correspond to high velocity gradients. The axial component of turbulence is approximately twice as large as the turbulence components in the lateral directions. The wake turbulence dissipates rapidly, whereas the turbulence caused by the jet mixing is preserved to a large extent"--Abstract, page ii.

Advisor(s)

Lee, S. C.

Committee Member(s)

Medrow, Robert A.
Tharp, Edward L.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Publisher

University of Missouri--Rolla

Publication Date

1972

Pagination

viii, 47 pages

Rights

© 1972 George Philip, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Turbulence -- Measurement
Shear flow -- Simulation methods
Turbulence -- Simulation methods
Reynolds stress

Thesis Number

T 2721

Print OCLC #

6033333

Electronic OCLC #

882928723

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