WFRF:(Eriksson Lars Erik 1950)
Sökning: WFRF:(Eriksson Lars Erik 1950) > (2015-2019) > Aero-acoustic analy...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03430naa a2200277 4500 | |
| 001 | oai:research.chalmers.se:38ab5a0f-b10f-483d-a358-8e581de69077 | |
| 003 | SwePub | |
| 008 | 171007s2015 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://research.chalmers.se/publication/2310292 URI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a kon2 swepub-publicationtype |
| 072 | 7 | a vet2 swepub-contenttype |
| 100 | 1 | a Yao, Huadong,d 1982u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)huadong |
| 245 | 1 0 | a Aero-acoustic analysis and assessment of conceptual low-noise airframe configurations |
| 264 | 1 | c 2015 |
| 520 | a High-lift (HL) configuration represents a significant part of airframe noise. Two different low-noise HL designs have been assessed with respect to a baseline HL configuration, which is a full-scale regional aircraft wing with a double-slotted part-span flap. The first design uses a single slotted flap. The second design, with a single slotted flap, has invoked a Krueger flap. Hybrid CFD/CAA analysis has been performed using acoustic analogies (the Kirchhoff, FW-H and Curle methods) based on hybrid RANS/-LES computations. It is shown that the Krueger flap has the best aerodynamic and aero-acoustic performances, which haves led to a noise reduction by 6-10dB. One of energetic airframe noise sources is associated to turbulent flow motion over the flap side-edge (FSE). To reduce FSE noise, a fence is attached onto the side edge. In the analysis of this configuration, an effective stochastic noise generation and radiation (SNGR) method was used, which formulates the noise sources based on the RANS solutions computations. The Lighthill acoustic analogy and boundary element method (BEM) in frequency domain have been employed for noise prediction. The analysis shows that the fence is able to effectively reduce noise by about 7dB. Another dominant airframe noise source is the turbulent flow induced by a landing gear (LG). Four low-noise conceptual designs are investigated for a full-scale main landing gear (MLG). The LG-bay door is opened to explore its noise scattering effect. Several different concepts measures for noise reduction have been investigated, including fairing, shallow LG-bay and acoustic liners. The aero-acoustic analysis has been demonstrated that, with a lined bay rear wall, the noise level has been was reduced by 1.817dBA. In the presentation, the aero-acoustic analysis and assessment on the aforementioned airframe configurations will be reporteds and discussed. | |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Strömningsmekanik och akustik0 (SwePub)203062 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Fluid Mechanics and Acoustics0 (SwePub)203062 hsv//eng |
| 700 | 1 | a Shia-Hui, Peng,d 1967u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)peng |
| 700 | 1 | a Davidson, Lars,d 1957u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)lada |
| 700 | 1 | a Eriksson, Lars-Erik,d 1950u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)lee |
| 710 | 2 | a Chalmers tekniska högskola4 org |
| 773 | 0 | t 2nd GRAIN2 Open Workshop and Mid-term Review 'Greening Aviation – A Global Challenge' Xi'an, China, 5th - 8th May 2015 |
| 856 | 4 8 | u https://research.chalmers.se/publication/231029 |
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