Perforated Arc-Tabs for Jet Control

Dharmahinder Singh Chand; S. Thanigaiarasu; S. Elangovan; E. Rathakrishnan

doi:10.1515/tjj.2011.012

Article

Perforated Arc-Tabs for Jet Control

Dharmahinder Singh Chand , S. Thanigaiarasu , S. Elangovan and E. Rathakrishnan

Published/Copyright: June 14, 2011

Published by

Become an author with De Gruyter Brill

Author Information

International Journal of Turbo & Jet-Engines

From the journal Volume 28 Issue 2

Abstract

This paper presents the effectiveness of perforated arc tabs to enhance the mixing of axi-symmetric subsonic and sonic jets. Measurements of centerline velocity decay and velocity distribution in the directions along and normal to the tabs were carried out in the controlled jet, from a convergent nozzle with two arc-tabs placed at diametrically opposite locations at the nozzle exit, were carried out. Similar measurements were done for the uncontrolled jets, for comparison. Mach 0.6, 0.7, 0.9 and sonic jet at nozzle pressure ratios 2 and 3 were tested. It is found that the perforated arc-tabs greatly enhance the jet mixing of both subsonic and sonic jets. The core length comes down by 65%, 66%, 62% and 75%, for Mach 0.6, 0.7, 0.9 and correctly expanded Mach 1 jets, respectively.

Keywords.: Perforated Tab; Passive Control; Potential Core; Shock Strength

Corresponding author: Dharmahinder Singh Chand, Department of Aerospace Engineering, Madras Institute of Technology, Anna University, Chennai-44, India

Received: 2011-01-25

Revised: 2011-02-20

Accepted: 2011-03-03

Published Online: 2011-06-14

Published in Print: 2011-June

You are currently not able to access this content.

Articles in the same Issue

https://doi.org/10.1515/tjj.2011.012

Keywords for this article

Perforated Tab; Passive Control; Potential Core; Shock Strength