I’m carrying out a project at Uni which is the design of a hydraulic turbine blade. The blade/ turbine will be fit within a tube (micro tubular) and has been designed to run at 300 rpm when a flow rate of 0.003m3/s passes through the tube.
My question is - if I have the pipe vertical and the blade constrained within the pipe so that there is a 1.5m head, can simulation show me the resulting turning velocity of the blade when I pass my desired flow rate through the tube?
tried attaching the **** but says too big, so have attaxhed the two blades Id like to test and tube. created in 2011 inventor pro
Any help would be kindly appreciated
Based on your comments it sounds to me that you can simulate this with SimCFD, but you are going to have to be careful with the setup. I would suggest that you model your simulation with the defined inlet flow rate and see what the resulting turbine speed is instead of using a pressure setup. When defining the inlet flow rate make sure that you don't use a constant flow rate, but include a linear warm up/ramp up period that lasts over 50-100 iterations worth of the simulation.
Since it seems that the transient response isn't important at the moment, when you define you inertial value for your turbine (or the solid material type), make sure that you use a much larger value than what it really is. This will only effect your transient response and not your steady state speed. The outcome will be a much more stable analysis. If you were to use a light turbine, you would likely see a chatter in the RPMs and most likely divergence unless you use a very small timestep.
When doing these turbine simulation, I sometimes like to turn on intellignet solution control (ISC) for added stability.
Try to simplify your geometry as much as possible so that you can keep your mesh count reasonable.
Thanks for your reply. Your answer scared me as Ive never used sim before and to be honest some of the wording went right over my head. Do you think this is possible for a newbie?
I wouldn't say it is the best problem to do as a newbie, but it is possible. If it is something that isn't NDA, we can work through it together in the forum.
If you could launch the geometry from Inventor into CFD and setup the model based on your what you think you should do and post a support share file here, we can review it and supply some comments to you.
thanks very much
im just downloading 2012 as this looks more visually friendly to me. Then im going to have to take my assembly over to sim and find out how to create a mesh of the two parts. Do you think that I need the full length of pipe of should I just use a small piece as if were using flow rate , head wont really come into consideration within the model does it?
appreciate your help thus far, thanks
been trying to follow this tutorial, selecting the face etc and isolating the bit to test as per this vid
but it wont allow me to do it, should i be trying to do this?
Ive got no where since we last mailed
ive created the assembly in inventor,
then shipped it over to sim through the add on, what steps next :-s
It is confusing, but Autodesk Simulation CFD is a different product from Autodesk Simulation Multiphysics and performing a fluid flow simulation (CFD). So if you are finding it hard to following the previous suggestions, it's because you are posting in the wrong Discussion Group! (The Discussion Group for Multiphysics/Mechanical is under Autodesk Simulation.)
I think your original question was "can it be done". The answer for Autodesk Simulation Multiphysics is no, unless these assumptions are true:
The second assumption is not true in reality since a driven turbine causes a pressure increase between inlet and outlet, where as a flow causing the turbine to rotate will have a pressure decrease between inlet and outlet.
So, where do you want to go from here?
Inventor Simulation has NO fluid flow (CFD) capability. All of the Autodesk Simulation packages are separate and mostly independent. Since Autodesk Simulation Mechanical/Multiphysics cannot solve your problem but Autodesk Simulation CFD can solve your problem, I suggest that you download .... Autodesk Simulation CFD. (Actually, I do not know for certain that it is available in the educational version. You will either find out when you try to download it, or one of the CFD experts will reply to this thread.)
Just for the record, the simulation packages are:
hi are their any users who have a copy of Autodesk Simulation CFD who can carry out a simulation for me and produce a report i currently cannot get this software on an education basis unfortunately grrrrrr
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