报告题目: |
Towards Numerical Prediction and Control of Airframe Noise |
报告人: |
Prof. Meng Wang |
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University of Notre Dame
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报告时间: |
2012-10-16 10:00 |
报告地点: |
逸夫技术科学楼1512会议室 |
主办单位: |
清华大学航院流体力学研究所 |
简介: |
Abstract
Airframe noise is a major component of the overall noise emitted by aircraft during landing approach. Its numerical prediction is particularly challenging due to the hydrodynamic and acoustic interactions with solid surfaces and the wide range of spatial and temporal scales. The difficulty is further exacerbated for numerical simulations aimed at evaluating the effect of flow control on noise reduction. In this talk we discuss some computational issues for accurate predictions of airframe noise in the framework of Lighthill's aeroacoustic theory in conjunction with high-fidelity flow simulations, followed by recent investigations in simplified flow configurations relevant to slat noise and landing-gear noise. These include a "rod-airfoil" configuration to validate numerical solutions against benchmark experimental measurements and study the turbulence interaction noise, and flow over tandem cylinders with active flow control to demonstrate the effectiveness of flow control for noise reduction. The physical mechanisms for noise generation and noise control are also discussed.
Biography
Educational Background
Ph.D., Mechanical Engineering, University of Colorado at Boulder, 1989.
M.S., Mechanical Engineering, University of Colorado at Boulder, 1985.
B.S., Thermal Science and Engineering, Zhejiang University, 1982.
Professional Experience
Dept. of Aerospace and Mechanical Engineering, Univ. of Notre Dame, Associate Professor, 2006
Center for Turbulence Research, Stanford Univ./NASA Ames Res. Ctr. Senior Researcher 1998
Center for Combustion Research, Univ. of Colorado at Boulder, Research Associate/Lecturer, 1989
Mechanical Engineering Department, Univ. of Colorado at Boulder, Teaching Assistant, 1984
Department of Thermal Science and Engineering, Zhejiang Univ. Assistant Lecturer, 1982
Professional Recognition and Honors
AME Department Ruth and Joel Spira Award for Excellence in Teaching, 2011.
Lewis F. Moody Award, ASME Fluids Engineering Division, 2006.
Postdoctoral Research Fellowship, Stanford/NASA Ctr. for Turbulence Research, 1992.
Research Interests
Dr. Wang is interested in applying computational tools to solve engineering fluid dynamics problems and study flow physics. In particular, he employs high-fidelity flow simulation methods including Large-Eddy Simulation (LES), Direct Numerical Simulation (DNS), and hybrid RANS/LES approaches to obtain time-accurate solutions for complex turbulent flows. Such solutions are needed in many applications such as flow-generated sound (aeroacoustics and hydroacoustics), flow-induced optical distortions (aero-optics), separated flows, and flow/noise control, which constitute the main emphasis of his current research. He also develops mathematical models and numerical techniques for computational fluid dynamics and aeroacoustics. |
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