Acoustic source map of rectangular cavity in 50 m/s flow at 15 kHz.
Cavities (landing gear bays, optical bays, pin holes, handle cutouts, weapons bays, etc.) are a necessary part of aerospace vehicles. While these cavities are required in practical engineered systems, they cause negative effects to the aircraft and bystanders in the form of increased drag, sonic fatigue, and noise emissions. Morphing the cavity structure is one method to reduce noise emission and this research investigates a hybrid structural morphing approach which applies simultaneous and collocated large-deformation quasi-static shape change and small-deformation high-frequency vibration to cavity walls. The impact of morphing quasi-static geometry is explored via high-performance time-resolved numeric simulation on TAMU and DoD HPC resources in Simcenter STAR-CCM+ and validated in the Texas A&M University 3’ x 4’ low-speed subsonic wind tunnel. The effects of high-frequency vibrational deformations are explored in this same wind tunnel with high-resolution continuous-scan acoustic measurement techniques.
Flow structures of two quasi-static cavity geometries resolved by large-eddy simulation.
Experimental aeroacoustic testing of quasi-static cavity geometries.
Graduate Student: Kevin Lieb