title: Numerical laser energy deposition on supersonic cavity flow and sensor placement strategies to control the flow.
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 x-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.
authors.affiliation: Department of Mechanical Engineering, TOBB University of Economics and Technology, Sogutozu Caddesi No. 43, 06560 Ankara, Turkey.
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Yilmaz
authors.affiliation: Department of Mechanical Engineering, TOBB University of Economics and Technology, Sogutozu Caddesi No. 43, 06560 Ankara, Turkey.
authors.forename: Selin
authors.initials: S
authors.lastname: Aradag
mesh_terms: D003198:Computer Simulation; D057446:Hydrodynamics; D007834:Lasers; D008962:Models, Theoretical; D009991:Oscillometry / Q000379:methods; D011312:Pressure; D013696:Temperature; D013997:Time Factors