Virtual Disk Model - Propeller Performance Curve

hlf13 · April 20, 2016, 17:42

Hi,

I'm trying out the virtual disk model (Body Force method) in Star CCM+ for a simulation. I'm wondering about the performance curve of the propeller that have to be set. Do I have to find the performance curve for every RPM that I want to test, or do I just have to find the performance curve for one specific RPM, and then use this in the virtual disk on every RPM I try out?

fluid23 · April 22, 2016, 12:37

Yes, you need this. If you don't know the propeller performance curve already, then the Virtual Disk BF method is not the right tool for the job. What exactly are you trying to do here?

hlf13 · April 23, 2016, 08:14

Quote:

Originally Posted by MBdonCFD

Yes, you need this. If you don't know the propeller performance curve already, then the Virtual Disk BF method is not the right tool for the job. What exactly are you trying to do here?

I have the performance curve now, and this is, as far as I can see, the same for every RPM.
Another question; do you know what the settings of the time-step will be with Virtual Disk? The same as for the propeller (in my case 1 deg per time-step)? Or can the time-step be higher when using virtual disk?

April 20, 2016, 17:42	Virtual Disk Model - Propeller Performance Curve	#1
hlf13 New Member Join Date: Apr 2016 Posts: 4 Rep Power: 10	Hi, I'm trying out the virtual disk model (Body Force method) in Star CCM+ for a simulation. I'm wondering about the performance curve of the propeller that have to be set. Do I have to find the performance curve for every RPM that I want to test, or do I just have to find the performance curve for one specific RPM, and then use this in the virtual disk on every RPM I try out?

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April 22, 2016, 12:37		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 18	Yes, you need this. If you don't know the propeller performance curve already, then the Virtual Disk BF method is not the right tool for the job. What exactly are you trying to do here?