how to study fans????
hi!! I'm working on a fan optimisation with the cfx571 cfd software. The fan i am studing is a part of an machine. So to optimize the fan and so the airflow throught the machine, i have to consider the pressure looses. How can i simply represent the pressure looses without represent all the geometry of the machine?
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Re: how to study fans????
Hi,
Use a momentum source. Look under general sources in the documentation. Create a CEL function which calculates the pressure increase across the fan, and set the flow rate with the momentum source according to the fan curve. You can use a interpolation function to have the entire fan curve if you like. Glenn Horrocks |
Re: how to study fans????
thank u Glenn!! I did not be clear to explain my issue. I try to explain the problem again
hi!! I'm working on a fan optimisation with the cfx571 cfd software. The fan i am studing is a part of an machine. So to optimize the fan and so the airflow throught the machine, i have to consider the pressure looses. How can i simply represent the pressure looses without represent all the geometry of the machine? -----------------------! machine with pressure ! looses due to the ! complexity of the ! connected to geometry. ! !--------------> the fan ! ! ! ! -----------------------! I would want to create thhe fan geometry into a pipe and i would want to simulate the pressure looses (that exist in the machine) at the beginning of the pipe. How can i represent these pressures looses? I know that i could impose a pressure in the inlet of the pipe. Is it the best solution? |
Re: how to study fans????
Hi,
You can use a momentum source to model the pressure loss in the machine then. You might want to use a flow loss source (pressure loss proportional to velocity squared) in this case - as long as the Reynolds number is high enough. Glenn Horrocks |
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