The influence of the wing and flaps geometry on the flow field and acoustic radiation of the jet are experimentally and numerically investigated. The azimuth non-uniformity of jet acoustic field was experimentally defined with a help of far-field microphones, flow field within the jet was measured using PIV technique and numerically calculated with a help high resolution combined RANS/ILES method. The jet flaps interaction (JFI) effects was experimentally and numerically investigated at facility under modeling of real bypass nozzle configuration and outflow parameters. The comparison between measured flow-field and noise of a jet shows that JFI excess noise is mainly related to jet deformation and increasing of velocity gradients and turbulence within jet which are induced by tip flap vortexes. NOMENCLATURE D: Diameter of nozzle (cm). U: Jet velocity (m/s). T: Total jet temperature (K). a: Angle of flap inclination (°). a 1 : Angle of wing attack (°). q: Polar noise emission angle relative to jet axis (°). F: Azimuth noise emission angle (°). f: 1/3-octave center frequency (Hz). M e : External outflow Mach number. NPR-Nozzle Pressure Ratio. BPR-ByPass Ratio JFI-Jet Flaps Interaction. SPL: Sound Pressure Level (dB). OASPL: Overall Sound Pressure Level (dB). Subscripts c and f denote core and fan counters of the nozzle.
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