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March 22, 2012, 07:09 |
A challenge for you in cfd(pipe problem)
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#1 |
New Member
mahe
Join Date: Mar 2012
Posts: 7
Rep Power: 13 |
Background and Problem Statement:
The manifolds used in the Actuation systems of the aircraft have the control logic inside it. This manifold will house different kind of valves, transducers, solenoids etc. It is always a challenge to provide the flow path between different components with the minimum pressure drop through the flow holes created for the purpose keeping in mind the structural failures thus maintaining thickness of material between the flow holes. And also to keep the total size to minimum and within the specified envelope. So there is always a need to have the flow paths having different orientations within the manifold. The current problem addresses this requirement using CFD to execute the comparative studies of the pressure drop for various orientations of the flow paths. The geometry needs to be created using any CAD software similar to the picture below with different orientations.Extract the fluid domain, and bring into theANSYS CFX software to perform the analysis Inputs: • Inlet pressure = 5000 psi • Flow rate = 16 cis • Fluid: Skydrol/Red Oil. • (Properties can be obtained from the internet) • Min dia holes: 0.2 in • Max dia of flow holes: 0.35 in • Test block size: 3.5 in *3.5in *1.75in Expected outputs: • Pressure and velocity plots for at least 2 different orientations of the flow paths • Hand calculation of the pressure drop using the standard flow equations and verify the CFD results THE DIAGRAM OF THE MANIFOLD IS ATTACHED.PLEASE FIND THE ATTACHMENT AND GIVE A REPLY.there is only one inlet and one outlet.the small hole which is made in the block is to connect inlet pipe and outlet pipe.small diameter pipe is to connect inlet and outlet pipes.later on it will be closed with a cap. Last edited by mahesh9; March 22, 2012 at 07:36. |
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March 22, 2012, 08:22 |
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#2 |
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Raja_Bhai
Join Date: Feb 2012
Location: UK
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What is your question?
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March 22, 2012, 10:45 |
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#3 |
New Member
mahe
Join Date: Mar 2012
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March 22, 2012, 11:39 |
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#4 |
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Raja_Bhai
Join Date: Feb 2012
Location: UK
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March 22, 2012, 18:01 |
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#6 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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Have you considered using the design optimisation stuff built into Workbench?
But this looks a little trivial for that - why not simply make the flow holes as big as possible and as short as possible? That is going to be pretty close to minimum flow resistance. There will be small optimisations to be had by corner details, but I suspect they will be minor. |
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March 23, 2012, 00:26 |
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#7 |
New Member
mahe
Join Date: Mar 2012
Posts: 7
Rep Power: 13 |
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March 23, 2012, 19:05 |
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#9 |
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Raja_Bhai
Join Date: Feb 2012
Location: UK
Posts: 40
Rep Power: 14 |
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