Acoustics Lab

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Recent Activity

Congratulations to Dr. Christopher Hickling!

10/16/2020

 
Christopher successfully defended his dissertation "Inhomogeneous, Anisotropic Turbulence Ingestion Noise in Two Open Rotor Configurations" and will begin his new position at NSWCCD this November. Congrats, Christopher!

Cough Analysis Work Featured on NPR

9/7/2020

 
Robbie Harris's interview with my colleague Dr. Shane Ross is available at the following link. They discuss our new project sponsored by the Virginia Tech COVID-19 Rapid Response Seed Fund which is focused on using machine learning to identify and count coughs in public spaces. We hope this information can be used as an early detection tool to inform local officials about potential outbreaks. Stay safe everyone.

www.wvtf.org/post/preparing-next-pandemic-counting-coughs#stream/0

Congratulations Stefan Letica!

9/7/2020

 
Congratulations to Stefan Letica on his successful MS defense! His thesis topic was focused on trailing edge noise reduction. His thesis should be available on the Virginia Tech ETD website soon. It is titled "Understanding the Impact of a Serrated Trailing Edge on the Unsteady Hydrodynamic Field". Great work, Stefan!

25th AIAA/CEAS Aeroacoustics Conference

6/4/2019

 
Just returned from the annual aeroacoustics conference in Delft, Netherlands. My student, Christopher Hickling, did a great job presenting his work concerning turbulence ingestion noise, and our work on drone noise received a lot of attention. VT was well represented at the conference. Congratulations to Dr. William Devenport for winning the AIAA Aeroacoustics Award and Kyle Daniel for winning Best Student Paper.
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Christopher giving his presentation
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Delft, Netherlands

Aerospace America Article

12/18/2018

 
The Year-In-Review article in the December issue of Aerospace America mentions our work in the drone park. The drone park is the featured picture for the Aeroacoustics contribution!

aerospaceamerica.aiaa.org/year-in-review/predicting-reducing-noise-from-supersonic-jets-and-unmanned-aircraft/

Flyovers in the Drone Park

11/19/2018

 
We finally had a dry day to complete some acoustic flyover measurements in the drone park. 
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Another Successful Wind Tunnel Test

6/8/2018

 
​Our graduate students have completed another successful wind tunnel test. This is the first test in a series considering the response of a rotor to transient and stochastic disturbances in the wake of a body of revolution. 
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PSU CAV Seminar

3/28/2018

 
It was a pleasure to speak at Penn State for their Center of Acoustics and Vibration. Thank you to Dr. Mike Jonson for the invitation and to all of the CAV members. 

Data Analytics in Wind Tunnel Measurements

3/20/2018

 
PhD candidate Aaron Defreitas is leading a test in the Virginia Tech Stability Wind Tunnel investigating data analysis methods for large diverse sensor systems. His analysis procedures are being used to identify anomalous results in real-time while collecting high volume data. The figure below shows the automated detection of a bad pressure port in a total pressure rake measuring the wake profile downstream of an airfoil. This port is seen in the profile at -10 degrees AoA. This is an obvious error, but the method is proving useful in detecting very small anomalies as well. These methods should improve identification of smaller errors that may be overlooked by a user trying to manage the collection of high volume data manually.
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Covariance matrix of pressure coefficient in wake of airfoil

Wind Tunnel Test for TIN Project

12/15/2017

 
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Just completed the first wind tunnel experiment for our new turbulence ingestion noise project. We tested the body of revolution designed collaboratively by researchers at the University of Notre Dame, Florida Atlantic University, and Virginia Tech. This body will produce a thick turbulent wake to be ingested by our rotor. 
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