Time-accurate simulations and acoustic analysis of slat free shear layer

被引：56

作者：

Khorrami, MR ^{[1
]}

Singer, BA

Berkman, ME

机构：

[1] NASA, Langley Res Ctr, Computat Modeling & Simulat Branch, Hampton, VA 23681 USA

[2] High Technol Corp, Hampton, VA 23666 USA

来源：

AIAA JOURNAL | 2002年 / 40卷 / 07期

关键词：

D O I：

10.2514/2.1817

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

A detailed computational aeroacoustic analysis of a high-lift flowfield is performed. Time-accurate Reynolds averaged Navier-Stokes computations simulate the free shear layer that originates from the slat cusp. Both unforced and forced cases are studied. Preliminary results show that the shear layer is a good amplifier of disturbances in the low- to midfrequency range. The Ffowcs Williams and Hawkings equation is solved to determine the acoustic field using the unsteady flow data from the Reynolds averaged Navier-Stokes calculations. The noise radiated from the excited shear layer has a spectral shape qualitatively similar to that obtained from measurements in a corresponding experimental study of the high-lift system.

引用

页码：1284 / 1291

页数：8

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