Aerodynamic Noise Prediction in Internal Flows Using LES and Linear Euler Equations

2002 ◽  
Author(s):  
Fabien Crouzet ◽  
Philippe Lafon ◽  
Tobias Buchal ◽  
Dominique Laurence
Keyword(s):  
Euler Equations ◽  
Aerodynamic Noise ◽  
Noise Prediction ◽  
Internal Flows

Mechanical and Aerodynamic Noise Prediction for Electric Vehicle Traction Motor and Its Validation

2017 ◽  
Author(s):  
Rahul Gurav ◽  
Kishor D Udawant ◽  
Ramkumar Rajamanickam ◽  
N V Karanth ◽  
S R Marathe
Keyword(s):  
Electric Vehicle ◽  
Aerodynamic Noise ◽  
Noise Prediction ◽  
Traction Motor

4124 Development of Cross-Flow Fans by means of Aerodynamic Noise Prediction Model

2006 ◽  
Vol 2006.2 (0) ◽  
pp. 439-440
Author(s):  
Yasushi SHIGENAGA ◽  
Shigehisa FUNABASHI ◽  
Masatoshi WATANABE ◽  
Yoshihiro TAKADA
Keyword(s):  
Prediction Model ◽  
Cross Flow ◽  
Aerodynamic Noise ◽  
Noise Prediction

Noise Prediction for Multi-Element Airfoil Based on FW-H Equation

2011 ◽  
Vol 52-54 ◽  
pp. 1388-1393
Author(s):  
Jun Tao ◽  
Gang Sun ◽  
Ying Hu ◽  
Miao Zhang
Keyword(s):  
Flow Field ◽  
Sound Pressure ◽  
Near Field ◽  
Pressure Level ◽  
Aerodynamic Noise ◽  
Noise Prediction ◽  
Far Field ◽  
Acoustic Analogy ◽  
Acoustic Information ◽  
Good Agreement

In this article, four observation points are selected in the flow field when predicting aerodynamic noise of a multi-element airfoil for both a coarser grid and a finer grid. Numerical simulation of N-S equations is employed to obtain near-field acoustic information, then far-field acoustic information is obtained through acoustic analogy theory combined with FW-H equation. Computation indicates: the codes calculate the flow field in good agreement with the experimental data; The finer the grid is, the more stable the calculated sound pressure level (SPL) is and the more regularly d(SPL)/d(St) varies.

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