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http://dx.doi.org/10.5139/JKSAS.2019.47.1.17

Effect on Flow Distortion of S-Duct by Boundary Layer Suction  

Baeg, Seungyong (Department of Mechanical Convergence Engineering, Hanyang University)
Lee, Jihyeong (Department of Mechanical Engineering, Hanyang University)
Cho, Jinsoo (School of Mechanical Engineering, Hanyang University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.47, no.1, 2019 , pp. 17-25 More about this Journal
Abstract
An intake of Aircraft becomes S-shaped geometry due to spatial limitation or procuring survivability. But curvature of the S-shaped geometry makes secondary flow or flow separation which is the cause of non-uniform pressure distribution. In this study, boundary layer suction is applied to RAE M 2129 S-Duct by attaching sub duct. Design variable is suction location and angle. A mass flow rate drawn out by suction at the sub duct outlet is constant over every model. A grid dependency test was conducted to verify validity of computation. The comparison among the CFD (Computation Fluid Dynamics), ARA experimental result, and ARA computation result of non-dimensional pressure distribution on the Port side and Starboard Side confirmed the validity of CFD. In this study, Distortion Coefficient was used for evaluating aerodynamic performance of S-Duct. The analysis, which was about flow separation, vortex, mass flow rate distribution, and pressure distribution were also investigated. Maximum 26.14% reduction in Distortion Coefficient was verified.
Keywords
Boundary Layer Suction; Flow Distortion; Flow Separation; Pressure Recovery; S-Duct; Sub Duct;
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