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David R. Williams, Ph.D.

Professor of Mechanical & Aerospace Engineering
Director, Fluid Dynamics Research Center

Office: 

E1-209C

Phone: 

312.567.3192

Fax: 

312.567.3173

Email: 

Education 

Doctor of Philosophy in Fluid Dynamics, Princeton University, 1982
Master of Science in Fluid Dynamics, Princeton University, 1979
Bachelor of Engineering in Mechanical Engineering, Stevens Institute of Technology, 1976

Expertise 

Flow control, flow metering, fluidic oscillators, linear and nonlinear wave interactions in transitioning flows, acoustic measurement techniques.

Research 

AFOSR - Active Control of Acoustic Tones in Aircraft Cavities

Aircraft are limited in the flight speed at which weapons bay cavities can be opened, because of the large amplitude acoustic resonances that develop. This project is aimed at preventing acoustic resonances in aircraft cavities by using active control. Pressure sensors detect the onset of resonant oscillations, which are cancelled by acoustic actuators. This technology may impact the noise in wheel well cavities on commercial aircraft.

Rockwell Science Center - Measurements of Stores Released from Weapons Bay Cavities

Releasing stores from internal weapons bay cavities has been a somewhat unpredictable process leading to large variability in store trajectories. The problem can be traced to the interaction between the store and the large oscillations in the shear layer present over the cavity. Researchers at Rockwell Science Center have developed new models for predicting the trajectories based on asymptotic methods. Experiments are being conducted in the IIT NDF wind tunnel to document the trajectories of generic models that are released from a cavity, in order to test the validity of the theory.

Acoustics Activities

The phenomenon of sonoluminescence is being studied experimentally in search of the mechanism leading to light production from concentrated acoustic waves. Acoustic beam-forming techniques are under investigation as a method to determine the key noise-producing elements from the CTA elevated train.

Awards 

Fellow, American Physical Society, 2006

IIT Sigma Xi Award for Excellence in Research, 2006

Honeywell Advanced Technology Achievement Award, 2006

IITRI Fellow, 1998

Stryker Outstanding Student Organization Advisor Award, 1990

MAE Dept. Excellence in Teaching Award, 1988

Alexander von Humboldt Fellow, 1982

Stevens Institute of Technology, Book Award, 1976

Guggewnheim Fellowship, Princeton University, 1976

Professional Society Memberships