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看了fluent帮助文件里和sysnoise相关的内容，好像是说要想把fluent算的流场导入sysnoise，就不能在fluent计算时启用FW-H方程，而是在sysnoise里根据流场数据重新计算声场，而且要把输出的坐标格式改为圆柱坐标系，因为fluent输出时默认的是笛卡尔坐标系。也没尝试过，大家共同讨论一下啊。
Exporting Source Data Without Enabling the FW-H Model
You can also export sound source data for use with SYSNOISE without having to enable the Ffowcs Williams and Hawkings (FW-H) model. You will still need to specify source surfaces (see Section 21.3.2), as .index and .asd files are required by SYSNOISE. In addition, you can choose fluid zones as emission sources if you want to export quadrupole sources. To enable the selection of fluid zones as sources, use the
define --- models acoustics export-volumetric-sources?
text command and change the selection to yes.
SYSNOISE also requires centroid data for source zones that are being exported.
For fan noise calculations, once you have specified the source zones in the Acoustic Sources panel and you have selected Export Acoustic Source Data from the Acoustic Model panel, you can export geometry in cylindrical coordinates by using the
define models acoustics cylindrical-export?
text command and changing the selection to yes. By default, FLUENT exports source zones for SYSNOISE in Cartesian coordinates.
You can then export the centroid data to a .data file using the following text command:
define models acoustics write-centroid-info
Since you will not be using the FW-H model to compute signals, you will not need to specify any acoustic model parameters or receiver locations. Also, you will not be able to turn on the Compute Acoustic Signals Simultaneously option in the Acoustics Model panel, and Acoustic Signals... will not be available in the Solve menu. |
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发表于 2010-4-21 19:54
显身卡
发表于 2010-10-24 14:14
