Robert Reger

Area of research

Aerospace Engineering · Computational Mechanics

Research interest

Research topics from publications: Experimental Study of the Rudimentary Landing Gear Acoustics; Low-order estimation of the velocity, hydrodynamic pressure, and acoustic radiation for a three-dimensional turbulent wall jet; On the acoustics of a circulation control airfoil; An Experimental Study of the Rudimentary Landing Gear; Low-Order Velocity Estimation and Acoustic Noise Generation by a Turbulent Wall Jet; Deconvolution Correction for Wandering in Wingtip Vortex Flowfield Data; Acoustic Generation by Pressure-Velocity Interactions in a Three-Dimensional, Turbulent Wall Jet; The Influence of Velocity Field Estimation on the Prediction of Far-Field Acoustics; A Method for Estimating Surface Pressure Forces and Far-Field Acoustics. Representative work: Fluid dynamic and aeroacoustic wind tunnel experiments are performed on a rudimentary landing gear model. The primary objective of these tests is to provide a set of acoustic data for verification of computational fluid dynamic and aeroacoustic simulations. Data acquired include mean and fluctuating surface pressures and acoustic measurements obtained by a linear array of 10 free-field microphones. Two primary configurations are tested, the first with one side bounded by a large aluminum baffle plate on the wing side of the model and the second with the plate removed. Mean surface pressure and acoustic measurements are obtained at speeds from Mach 0.09 up to Mach 0.18 and fluctuating surface A method for estimating the velocity fluctuations, hydrodynamic pressure fluctuations, and far-field acoustic pressure in a planar turbulent wall jet is examined. The Reynolds number based on nozzle height and exit velocity is 25,500. Streamwise-aligned, two-component particle image velocimetry and surface pressure measurements are obtained synchronously along the center line of the wall jet. Modified stochastic estimation is used to estimate a low-dimensional representation of the time-dependent velocity field, and performance metrics for the evaluation of the estimates are presented. The use of proper orthogonal decomposition in the estimation is evaluated against the estimation of individ

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