Predictions of Slat Noise from the 30P30N at High Angles of Attack using Zonal Hybrid RANS-LES

Speaker: Jeffrey Housman, Computational Aerosciences Branch, NASA Advanced Supercomputing Division
August 7, 2019

Presentation

Abstract

Aeroacoustic predictions of slat noise from the 30P30N three-element high-lift system at high angles of attack are presented using a zonal hybrid RANS-LES method. The simulations are part of the 5th AIAA Benchmark problems for Airframe Noise Computations (BANC-V) Workshop. An economical approach utilizing structured overset grids with spatially varying span-wise grid resolution and a high-order accurate finite difference method is described. The method is utilized for near-field predictions at three angles of attack: 5.5, 9.5, and 14.0 degrees. Far-field noise is obtained by propagating the near-field solution using a permeable surface Ffowcs Williams-Hawkings (FWH) method. Good agreement is obtained with both near-field and far-field Power Spectral Density (PSD) data from an experimental study of the 30P30N in the 2m x 2m Kevlar-wall wind tunnel at the Japan Aerospace Exploration Agency (JAXA). Specifically, the reduction in narrow band peaks and overall broadband noise levels with increasing angle of attack is captured well using the zonal hybrid RANS-LES method.

Biography

Jeffrey Housman received his Bachelor of Science in Mathematics from Sonoma State University in 2000 and his Ph.D. in Applied Mathematics from U.C. Davis in 2007. Housman came to NASA Ames Research Center in 2001 and has been working with Cetin Kiris in the LAVA group in the Computational Aerosciences Branch of the NASA Advanced Supercomputing Division. In LAVA, his work has been focused on developing a high-order high-performance structured overset curvilinear grid solver and far-field aeroacoustic propagation/scattering modules. Housman has worked on a wide range of NASA mission related applications including launch vehicle takeoff and ascent analysis, aeroacoustic analysis of high-lift devices, and noise generation from propulsion systems such as open rotors and jets. He has a received a NASA Individual Achievement Award for his work on the Space Launch System in 2012 and the NASA Early Career Achievement Metal in 2013.

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