Mean and Turbulence Characteristics of a Class of Three-Dimensional Wall Jets—Part 1: Mean Flow Characteristics

[+] Author and Article Information
G. Padmanabham

Department of Aeronautical Engineering, Madras Institute of Technology, Anna University, Madras 600 044, India

B. H. Lakshmana Gowda

Fluid Mechanics Laboratory, Department of Applied Mechanics, Indian Institute of Technology, Madras 600 036, India

J. Fluids Eng 113(4), 620-628 (Dec 01, 1991) (9 pages) doi:10.1115/1.2926525 History: Received April 25, 1991; Online May 23, 2008


This paper reports experimental investigations on mean and turbulence characteristics of three-dimensional, incompressible, isothermal turbulent wall jets generated from orifices having the shapes of various segments of a circle. In Part 1, the mean flow characteristics are presented. The turbulence characteristics are presented in Part 2. The influence of the geometry on the characteristic decay region of the wall jet is brought out and the differences with other shapes are discussed. Mean velocity profiles both in the longitudinal and lateral planes are measured and compared with some of the theoretical profiles. Wall jet expansion rates and behavior of skin-friction are discussed. The influence of the geometry of the orifice on the various wall jet properties is presented and discussed. Particularly the differences between this class of geometry and rectangular geometries are critically discussed.

Copyright © 1991 by The American Society of Mechanical Engineers
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