3. Set the fan parameters and rotation axis

When creating a Fan Noise load, each fan blade is automatically segmented into rectangular strips, or segments, for which an acoustic source is created at the center of gravity of each strip. Each fan blade is segmented as a function of the input fan blade geometry, fan rotational frequency, and the speed of sound. The segment size is smaller than the acoustic wavelength to create an accurate acoustic load.

You specify the fan rotation axis coordinate system coincident with the fan center of rotation. A fan noise source rotates around the Z-axis of the specified axis system from X to Y (right-hand rule). For more information, see Fan Segmentation dialog box.

1. In the Simulation Navigator, right-click Model and Load Pre-Processing and choose Add Operation→Fan Noise Segmentation.In the Fan Segmentation dialog box, set the Maximum Computation Frequency and Speed of Sound.

2. On the Fan Rotation Axis tab, set the CSYS of the fan rotation. Specify CSYS .Set the center of fan rotation to be coincident with the CSYS Z-axis, with the fan rotation from X- to Y-axis (positive right-hand rule).

3. Click OK to close the dialog box.

Next step
4.Convert the pressure data to fan blade force

How do I

Create a Fan Noise load and solution

1. Import the CFD pressure data

2. Map the CFD fan mesh to transient fan blade elements

4.Convert the pressure data to fan blade force

5. Create an acoustic SOL 108 Direct Frequency Response solution

6. Create a Fan Noise load or loads

7. Edit the solution to add Output Requests and Harmonics

8. Edit units, solve the solution, and post process results

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

3. Set the fan parameters and rotation axis, Simcenter 3D 2021.1 Series

© 2020 Siemens

window.mainLanguage="en_US"

window.delivId=""

window.projectId=""

MathJax.Hub.Config({ TeX: { extensions: ["autoload-all.js"] }, tex2jax: { displayMath: [ ] }, "SVG": { scale: 125 } });