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The Scientific World Journal
Volume 2013 (2013), Article ID 141342, 8 pages
http://dx.doi.org/10.1155/2013/141342
Research Article

Numerical Laser Energy Deposition on Supersonic Cavity Flow and Sensor Placement Strategies to Control the Flow

Department of Mechanical Engineering, TOBB University of Economics and Technology, Sogutozu Caddesi No. 43, 06560 Ankara, Turkey

Received 13 August 2013; Accepted 26 September 2013

Academic Editors: Z.-H. Han and S. B. Leonov

Copyright © 2013 Ibrahim Yilmaz and Selin Aradag. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this study, the impact of laser energy deposition on pressure oscillations and relative sound pressure levels (SPL) in an open supersonic cavity flow is investigated. Laser energy with a magnitude of 100 mJ is deposited on the flow just above the cavity leading edge and up to 7 dB of reduction is obtained in the SPL values along the cavity back wall. Additionally, proper orthogonal decomposition (POD) method is applied to the -velocity data obtained as a result of computational fluid dynamics simulations of the flow with laser energy deposition. Laser is numerically modeled using a spherically symmetric temperature distribution. By using the POD results, the effects of laser energy on the flow mechanism are presented. A one-dimensional POD methodology is applied to the surface pressure data to obtain critical locations for the placement of sensors for real time flow control applications.