garage19
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| posted on 2/10/07 at 10:44 AM |
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Plenum chamber design and CFD software?
Recently I’ve been putting a bit of work into designing a couple of plenum chambers. With the aid of a mate I have had a go at doing some CFD
modelling using the new CFD package supplied with Solidworks ’08.
I was just wondering if anyone had any experiences of other CFD packages and could recommend one that is fairly easy to get on with.
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Findlay234
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| posted on 2/10/07 at 01:01 PM |
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CFD software is improving all the time but you may find that the simpler the software the more simple or basic the outcome will be. Make sure that you
use one where you can easily alter the mesh size and type easily so you can minimise errors with a convergence study. ive used Fluent (with gambit as
the modeller) extensively in my degree and have found it to be a complex but powerfull program.
Along with just designing the plenum to pass air smoothly you will need to ensure the design is acoustically matched to the engine and the optimum
engine speed. This can be done with some complex maths derived from helmholtz theory or can be achieved with a bit of iterative testing using an
engine simulator such as Lotus Engine Simulator or Engine Analyser Pro.
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britishtrident
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| posted on 2/10/07 at 02:57 PM |
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I used Fluent in its early days very powerful BUT you really need to know what you are doing with CFD software even more than with structures FEM as
it is very easy to produce answers that are totally invalid.
With CFD the whole key is boundary conditions where the flow enters the model.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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