Computational Analysis of Mixing Characteristics of Jets from Rectangular Nozzle with Internal Grooves

M  Sundararaj   and S  Elangovan

doi:10.17485/ijst/2013/v6isp5.1

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Computational Analysis of Mixing Characteristics of Jets from Rectangular Nozzle with Internal Grooves

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Indian Journal of Science and Technology

DOI: 10.17485/ijst/2013/v6isp5.1

Year: 2013, Volume: 6, Issue: Supplementary 5, Pages: 1-6

Original Article

Computational Analysis of Mixing Characteristics of Jets from Rectangular Nozzle with Internal Grooves

M. Sundararaj^1* and S. Elangovan²

¹Associate Professor, Department of Aeronautical Engineering, [email protected]
²Professor, Department of Aeronautical Engineering, [email protected]
*Author for Correspondence
M. Sundararaj
Department of Aeronautical Engineering,
Email:[email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

A Computational study has been carried out to understand jet flow development from plain and grooved rectangular nozzles of aspect ratio 2:1. Grooves of square cross section of side 4mm and axial length 5mm were introduced at the exit of the nozzle in three different orientations as (i) minor-axis, (ii) major-axis and, (iii) in both minor and major axes. The computational studies were carried out using computational software ANSYS CFX for a nominal jet exit velocity of 20m/s. Velocity distribution along the axis of the jet is observed from computational results and compared with the available experimental results. Grooves seem to have very negligible effect on the near field region but significantly influence the jet decay in the far field.
Keywords: Passive Control, Jet Mixing Enhancement, Rectangular Jet and Center Line Velocity Decay