Design and Testing of Low Noise Landing Gears
| Autor: | Malcolm Smith, Leung Choi Chow, Christelle Seror, Werner Dobrzynski, Christopher Neil Wood, Britta Schöning |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
020301 aerospace & aeronautics
Acoustics and Ultrasonics Aircraft noise Computer science business.industry Full scale Aerospace Engineering 02 engineering and technology Aerodynamics Computational fluid dynamics 01 natural sciences 010305 fluids & plasmas Noise 0203 mechanical engineering 0103 physical sciences Airframe business Wind tunnel Marine engineering Landing gear |
| Zdroj: | International Journal of Aeroacoustics. 5:233-262 |
| ISSN: | 2048-4003 1475-472X |
| DOI: | 10.1260/1475-472x.5.3.233 |
| Popis: | In the approach phase of large commercial aircraft, airframe noise - and in particular that from landing gears - is one of the dominating aircraft noise components. Within a European co-financed research project entitled “Significantly Lower Community Exposure to Aircraft Noise” (codenamed SILENCER) a study in “advanced low noise landing gear design” was performed to develop operational landing gears which take into account aeroacoustic constraints early in the design stage. Airbus aircraft typical configurations of low wing with underslung engines and A340 type gears were selected as reference. RANS flow field calculations were performed and dedicated to identify and thus avoid the impingement of high speed flow onto critical gear structure elements. The evaluation of CFD results with respect to the effects on aerodynamic noise were performed on the basis of related experimental experience and a semi-empirical landing gear noise model. Both low noise advanced nose and main landing gears were designed and manufactured at full scale for noise testing in the 8 m by 6 m open test section of the German-Dutch Wind Tunnel (DNWLLF). Relative to the conventional reference gears a reduction of broadband landing gear noise in the order of -5 to -6 dB (i.e. on source level) was achieved. |
| Databáze: | OpenAIRE |
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