Pressure fluctuation - Vibration

MGE_CFD · July 10, 2018, 21:03

Dear, I need some help!

I am doing a simulation of a rotor and diffuser and would like to do the analysis of vibration of the passage of the blades (rotor 6 blades and diffuser 8 blades), does anyone have a similar tutorial?

To capture pressure fluctuation I imagine it to be a transient analysis with the initial condition of a stationary simulation with the same boundary conditions (I do not know if I'm correct!)

.

But how do I determine the frequency of vibration? Is it in the CFX module?

Sorry if I'm writing nonsense, but the lower is the value of the pressure fluctuation between blades becoming favorable?

I thought about simulating 1/100 of the time of each passage.

Thank you

ghorrocks · July 14, 2018, 07:12

Have a look at the blade flutter tutorials on the ANSYS Customer website. If this model is relevant to you it will assist greatly.

July 10, 2018, 21:03	Pressure fluctuation - Vibration	#1
MGE_CFD New Member MGE_CFD Join Date: Jun 2018 Posts: 8 Rep Power: 7	Dear, I need some help! I am doing a simulation of a rotor and diffuser and would like to do the analysis of vibration of the passage of the blades (rotor 6 blades and diffuser 8 blades), does anyone have a similar tutorial? To capture pressure fluctuation I imagine it to be a transient analysis with the initial condition of a stationary simulation with the same boundary conditions (I do not know if I'm correct!) . But how do I determine the frequency of vibration? Is it in the CFX module? Sorry if I'm writing nonsense, but the lower is the value of the pressure fluctuation between blades becoming favorable? I thought about simulating 1/100 of the time of each passage. Thank you

July 14, 2018, 07:12		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Have a look at the blade flutter tutorials on the ANSYS Customer website. If this model is relevant to you it will assist greatly. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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