An experimental investigation into model-scale installed jet–pylon–wing noise

A model-scale experimental investigation of an installed jet–pylon–wing configuration was conducted at the University Southampton, with scope to study effect a pylon has on noise generation and clarify its impact fluctuating wall-pressure load. The set-up consisted two single-stream nozzles, baseline axisymmetric annular nozzle partially blocked nozzle. nozzles were tested first isolated then next NACA4415 aerofoil ‘wing’ single nozzle–wing position. jet Mach number varied between $0.5 \leq M_{{j}} 0.8$ measurements performed both under static in-flight ambient flow conditions up ${M_{{f}} = 0.2}$ . flow-field qualification carried out using single-velocity-component hot-wire anemometer probe. pressure field wing surface investigated miniature transducers that flush-mounted in streamwise spanwise directions within side wing. linear ‘flyover’ microphone array used record radiated far field. unsteady data analysed time frequency domains multi-variate statistics, highlighting far-field reduction provided by presence only case. Furthermore, wake generated behind is seen significantly modify fluctuations, particularly locations close trailing edge.