A linearized Euler finite-difference time-domain sound propagation model with terrain-following coordinates

被引：21
|
作者：
Heimann, D [1 ]
Karle, R [1 ]
机构：
[1] Deutsch Zentrum Luft & Raumfahrt, Inst Phys Atmospher Oberpfaffenhofen, D-82234 Wessling, Germany
来源：
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | 2006年 / 119卷 / 06期
关键词：
D O I：
10.1121/1.2200139
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
The equations of a linearized Euler finite-difference time-domain model for sound propagation through an inhomogeneous and moving atmosphere above absorbing ground are adapted to terrain-following coordinates. With the transformed numerical grid the effect of gentle orography is fully considered and the shortcomings of the representation of the orography by blocked-out grid cells in an untransformed grid are avoided. Comparisons with an analytical method to predict the interference patterns of a monochromic sound field above an idealized hill with rigid ground show good agreement. Further applications include absorbing ground and wind. A three-dimensional application also is discussed. (c) 2006 Acoustical Society of America.
引用
收藏
页码：3813 / 3821
页数：9
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