TY - JOUR
AU - Dubey, Ritukanchan
AB - J Vis (2017) 20:711–727 DOI 10.1007/s12650-017-0420-z REGULAR PAPER G. K. Suryanarayana Ritukanchan Dubey Image analyses of supersonic air-intake buzz and control by natural ventilation Received: 6 March 2016 / Revised: 4 January 2017 / Accepted: 6 January 2017 / Published online: 16 February 2017 The Visualization Society of Japan 2017 Abstract Intake buzz was initiated on a typical two-dimensional supersonic air-intake model at various supersonic Mach numbers up to 3 by gradually changing the back pressure from supercritical to subcritical operating condition in a wind tunnel. Schlieren pictures from a still camera and a high-speed camera were recorded. Analyses of individual high-speed images of the unvented intake were carried out to locate the time-dependent positions and velocities of the ramp shock around the cowl lip. The displacements of the shock indicate sinusoidal oscillations with dominant frequency of 102.4 Hz, close to that obtained from unsteady pressure measurements. Phase trajectories of shock position based on image analyses indicate that the shock oscillations have limit cycle type oscillation, typical of nonlinear dynamic systems. Natural ventilation of the intake was found to be extremely effective in increasing the total pressure recovery, suppress buzz oscillations and in delaying the onset of buzz by 
TI - Image analyses of supersonic air-intake buzz and control by natural ventilation
JF - Journal of Visualization
DO - 10.1007/s12650-017-0420-z
DA - 2017-02-16
UR - https://www.deepdyve.com/lp/springer-journals/image-analyses-of-supersonic-air-intake-buzz-and-control-by-natural-40yWgjMFO0
SP - 711
EP - 727
VL - 20
IS - 4
DP - DeepDyve
ER -