[cheap_person]

Hey Guys!
How are you doing?

Well, I've been designing an impeller,
Kindly consider me as a beginner throughout the conversation.

Now I am trying to generate a performance map {nominal mass flow rate v/s pressure ratio} of the impeller to know the operational range.
However, I've gone through the Ansys documentation & YouTube but found no tutorial.

If there are already some tutorials, please provide me with any references.
In case of unavailability, we can continue with the threat.
But I don't have any clue how to start.

It would be warmly appreciated if any replies.

Sending positive vibes!
cheap person 😁

[LuckyTran]

I recommend you to study the Ansys tutorials

1. Simulate Impeller with your choice of BC's. If you specify mass flow then calculate the pressure head. If you specify the inlet and outlet pressure then calculate the massflow.
2. Change the BC to another operating point. Run the simulation. Calculate the performance again at this new OP.
3. Simulate another OP, calculate the performance again.
4. Repeat until you have your map

As you can see, it is straightforward if you know how to do the CFD of anything. The issues that arise are, you cannot get to the first step because you don't know how to install workbench, how to launch it, how to make a mesh, how to do all the stuff in zeroth step which are all completely related to your impeller

[cheap_person]

Originally Posted by LuckyTran

I recommend you to study the Ansys tutorials

1. Simulate Impeller with your choice of BC's. If you specify mass flow then calculate the pressure head. If you specify the inlet and outlet pressure then calculate the massflow.
2. Change the BC to another operating point. Run the simulation. Calculate the performance again at this new OP.
3. Simulate another OP, calculate the performance again.
4. Repeat until you have your map

As you can see, it is straightforward if you know how to do the CFD of anything. The issues that arise are, you cannot get to the first step because you don't know how to install workbench, how to launch it, how to make a mesh, how to do all the stuff in zeroth step which are all completely related to your impeller

Thank you so much Lucky Tran for replying to me!!

but I have some doubts:
1. I run the steady simulation for 3 hours with 1000 iterations and the transient simulation for one and a half hours with 200-time steps with 5 sub-iterations.

I cannot afford such high computational costs. so how can I reduce it?

2. My input parameters is {speed} and output parameters are {pressure ratio, mass flow rate}, which is time dependent.

If I am wrong anywhere, please correct me or if there is another method, please tell me.


Sending positive vibes... Again!
cheap person 😁

[LuckyTran]

Don't be cheap


I could tell you the secret to doing it cheaper but you have to subscribe to my video for $25 but you have to sign up in the next 60 seconds because I have limited offers and they're going fast.

[cheap_person]

Originally Posted by LuckyTran

Don't be cheap


I could tell you the secret to doing it cheaper but you have to subscribe to my video for $25 but you have to sign up in the next 60 seconds because I have limited offers and they're going fast.

I'm sorry lucky, currently I can't invest such amount. But in future definitely yesss. Can you send me link

Damn.. your pitching style... Demand and supply.

Once a cheap always a cheap 🤣
cheap person