Slat noise reduction using steady suction
WebSep 26, 2014 · A rigid and none actuated adaptive slat was mounted at the inboard station of the high lift system in two setting positions. The first one was an intermediate position providing a gap reduction of about 45%. The second was the … WebJun 8, 2024 · The leading edge slat of a high-lift system is one of the main noise contributors on many commercial aircraft during approach. This paper continues our previous studies on the gap filler for passive noise control on the 30P30N high-lift airfoil.
Slat noise reduction using steady suction
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WebGiven the basic knowledge of the slat flow field, a variety of noise reduction techniques have been studied. The aim is to either reduce the region of flow unsteadiness or alter their position such that they minimally interact with the airfoil surfaces. WebAug 16, 2013 · A new approach, mass injection near the slat cusp, is proposed for the suppression of slat noise. The mechanism and efficiency of the slat noise suppression …
Weblength scales as provided by a steady RANS computation of the turbulent flow problem. The method is applied to simulate spectra and direc-tivities of the slat noise problem. The Mach number scaling law of the broadband slat noise component is evaluated based on three different freestream velocities (M=0.088, 0.118, 0.165). The acoustic ... WebApr 7, 2024 · It is demonstrated that the dominant features of the flap side-edge flow are the double vortex structures, and the new passive blowing air reduction method can achieve about 3.3 dB noise...
WebJun 25, 2024 · Slat geometry modifications associated with the treatments alter the flow field in the region that dominates the generation of the acoustic field. Three angles of attack (alpha_k = 8, 10, and... WebSlat noise reduction concepts under review were 1) slat gap/overlap setting variations, and 2) an adaptive slat with the potential to reduce the gap width for noise reduction. Both concepts were proven highly e cient: Sealing of the gap leads to a maximum 5-dB noise reduction at wing level, equivalent to a full elimination of the slat noise source.
WebSep 13, 2024 · The slat cusp extensions barely affect the mean C p distribution, whereas the longest extension achieves up to a 5.4 dB reduction in the overall sound pressure level. The slat-cove filler yields an even higher noise reduction that …
WebJun 19, 2012 · Slat Noise Reduction Using Steady Suction Thilo Knacke and Frank Thiele Thilo Knacke Technische Universität Berlin Search for more papers by this author and … hair joy salonWebApr 1, 2013 · The control effect of air suction on slat noise was numerically studied by Knacke and Thiele. 65 By using steady suction at the inner slat surface, they … pinto bean nutrition valueWebThe turbulent flow around a high-lift configuration consisting of slat, main element and flap is simulated at a Reynolds number of 1.7 × 10 6 with an implicit finite-volume based … hair junkie kerrville txWebJan 5, 2024 · Noise reduction capabilities of slat cusp serration were experimentally assessed and demonstrated for a 30P30N three-element high-lift airfoil fitted with two … pinto eliseWebJan 7, 2008 · A 2D finite volume code is utilized to study the slat noise reduction using steady suction at high Reynolds number and is proven to be effective in this objective [8]. … pinto bohnen kaufenWebMar 1, 2024 · The slat and flap chords are approximately equal to 15% c and 30% c, respectively. In the present study, the slat and flap deflections are both 30 ° for the … pinto bean on mainWebJun 1, 2010 · The computations show that the presence of the “blade” seal at the cusp in the simulated geometry significantly changes the slat cove flow dynamics, reduces the … pinto buckskin stallion