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Community Noise in Airplane Design

Community Noise in Airplane Design. FAA/ICAO have very specific requirements Numerous contributors Jet noise Flow Sep’n noise Clean airframe noise. (Source: www.airliners.net). Noise Sources. Consider aircraft noise in the conceptual design phase

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Community Noise in Airplane Design

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  1. Community Noise in Airplane Design • FAA/ICAO have very specific requirements • Numerous contributors • Jet noise • Flow Sep’n noise • Clean airframe noise (Source: www.airliners.net)

  2. Noise Sources • Consider aircraft noise in the conceptual design phase • Design for low-airframe-noise transport aircraft using MDO • Quantify change in performance w.r.t. traditionally designed aircraft Ref: AIAA 2006-0230

  3. FAA Part 36 Noise Requirements Approach Noise (EPNdB) (Data from “Advisory Circular”, DOT, FAA, November 2001) TOGW - 1000lbs EPNdB - frequency weighted metric

  4. Aircraft Noise Certification Thrust Cutback Lift-Off Threshold 120 m (394 ft) Flyover 450 m (0.28 miles) Approach Sideline Brake Release 2,000 m (1.24 miles) 6,500 m (4.04 miles) • Aircraft must be certified by the FAA and ICAO in terms of noise levels • Certification noise is measured at flyover, sideline, and approach • Based on aircraft max TOGW and number of engines, the noise level is limited • Additionally, regulations limit the hours and the number of operations

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