David R. Williams, PhDProfessor of Mechanical & Aerospace Engineering
Director, Fluid Dynamics Research Center
- Flow control, flow metering, fluidic oscillators, linear and nonlinear wave interactions in transitioning flows, acoustic measurement techniques.
- Bachelor of Engineering in Mechanical Engineering, Stevens Institute of Technology, 1976
- Master of Science in Fluid Dynamics, Princeton University, 1979
- Doctor of Philosophy in Fluid Dynamics, Princeton University, 1982
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.
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.
- 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