Research

 
Interests: Experimental fluid dynamics, environmental flows, turbulent boundary layers, real-time flow control, propulsion, drag-reducing surfaces, microfluidics, coherent wave fields, shock wave boundary layer interaction, jet aeroacoustics, nonlinear acoustics, reduced-order modeling, stochastic tools, transient signal processing.
 


Data & Scripts


 

Turbulent boundary layers

  • Direct measurements of local wall-drag in smooth- and rough-wall turbulent boundary layers (TBLs).
  • Large-scale modulation and large-scale arrangement of small scales in high Reynolds number TBLs.
  • Real-time, active control of large-scale structures in high Reynolds number TBLs.

 

Jet aeroacoustics

  • Aeroacoustic aspects of heated and unheated supersonic jets.
  • Nonlinear acoustic waveform distortion in noise fields of supersonic jets.
  • Crackle-noise emitted by supersonic jets.

 

Supersonic nozzle flows

  • Shock wave boundary layer interaction (SWBLI) in overexpanded, large area ratio nozzles.
  • Side-load unsteadiness of thrust-optimized/truncated-ideal-contoured nozzles.
  • Transient unsteadiness during start-up and shut-down.
  • Vibro-acoustic loads during start-up, representative of nozzle ignition.

 

Stochastic processing

  • Reduced-order models and system identification of complex data.
  • Stochastic estimation techniques.
  • Signal processing: spectral analysis and joint-time frequency distributions.