Now showing items 20-21 of 21

    • Turbulence Measurements in Trailing Vortices for B.W.I. Noise Prediction 

      Devenport, William J.; Glegg, Stewart A. L.; Sharma, Gautam (Virginia Polytechnic Institute and State University, 1992-06-01)
      Blade wake interaction (BWI) noise is the broadband noise generated by the ingestion of turbulent tip vortices into helicopter rotors. Prediction of BWI noise requires knowledge of the turbulence structure of the tip vortex. ...
    • Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows 

      Li, Fei; Yu, XiLong; Cai, Weiwei; Ma, Lin (Optical Society of America, 2012-07-01)
      This work investigates the error caused by nonuniformities along the line-of-sight in velocity measurement using tunable diode-laser absorption spectroscopy (TDLAS). Past work has demonstrated TDLAS as an attractive ...