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How can I set double inlets?

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Old   April 19, 2022, 00:12
Post How can I set double inlets?
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Luiz Marroquim
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Hi, I'm trying to simulate the efficiency of stabilizers of a airplain. Basically my geometry consists: fuselage, stabilizers and propeller.
I want to put a circle inlet to emulate the propeller on the nose of the airplane.
I know it's not the right way to do this, I should go for a unsteady analysis, but because of the computacional cost it's not possible in the moment.
I want to plot the streamlines with seed in the propeller and see how the flow affects the tail, I tried to create the propeller as a surface on Solid Works and set as an inlet on Star but it didn't work.

Should I create a body instead? Wich boundary conditions in the surfaces? If someone could help me I'll be glad, Thanks! Unfortunately I cannot send you the images.
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Old   April 21, 2022, 12:37
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Matt
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You want to what now? Put an inlet on the nose of the aircraft to simulate a propeller?

You are correct that it's not the 'right way' to approach that problem. Your boundary conditions should be far away from the aircraft. The tool you want to use is a virtual disk. It places a momentum source linked to a propeller performance model which approximates the bulk effect on the flow without modeling the propeller directly.

It's not perfect and the various models require a range of detail for inputs. The blade element virtual disk is probably the most robust, if you have actual propeller geometry you can use to obtain the various inputs.

Refer to the help manual for details. There are also tutorials for several, if not all, of the virtual disk model options.
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Old   April 21, 2022, 13:40
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Luiz Marroquim
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Quote:
Originally Posted by fluid23 View Post
You want to what now? Put an inlet on the nose of the aircraft to simulate a propeller?

You are correct that it's not the 'right way' to approach that problem. Your boundary conditions should be far away from the aircraft. The tool you want to use is a virtual disk. It places a momentum source linked to a propeller performance model which approximates the bulk effect on the flow without modeling the propeller directly.

It's not perfect and the various models require a range of detail for inputs. The blade element virtual disk is probably the most robust, if you have actual propeller geometry you can use to obtain the various inputs.

Refer to the help manual for details. There are also tutorials for several, if not all, of the virtual disk model options.
Tyvm!! I didn't know about this tool. As I said, it is really wrong but my collegues on the University have done this way several times. Now I know i'm not crazy, I will try to set this better, thanks for your reply!
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