OpenVSP newbie questions

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Anton Maier

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Aug 19, 2021, 6:02:37 PM8/19/21
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I would like to design a hydrofoil in OpenVSP. I am new to fluiddynamics and simulation and trying to gauge which tool to use. I came up with a few candidates:

1. xflr5/flow5
2. sharpy uses uvlm and xbeam
3. openvsp
4. openaerostruct

Reading through examples and guides I found a pdf talking about aeroelasticity simulations in openvsp but i wasn't sure if openvsp is able to do it or if it was some kind of future outlook.

Secondly, I would like to know if openvsp is able to simulate a waterline.

For context:
I would like to design a hydrofoil in a canard setting or boxwing setting and optimize it using parametric optimization. First I was only interested in aerodynamics but then I have seen that people even do flutter analysis, and so I am thinking about doing an aeroelastic optimization too.

Kind regards
Anton Maier


Rob McDonald

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Aug 20, 2021, 1:06:22 PM8/20/21
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These are pretty sophisticated things to do for someone who is new to fluid dynamics.  I suggest you start off with a simple project and work up from there as you gain success.

To my knowledge, none of these tools will be able to model a flow with the free surface air-water interface included.  It isn't that potential theory can't do this, but it is a specialized boat thing and none of these tools are designed from the start as boat tools.

Instead, they will be able to model flow far away from the surface of the water -- a deep submarine or an airplane is fine -- but they won't do great right around the surface...

Rob


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Anton Maier

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Aug 23, 2021, 6:13:39 PM8/23/21
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I gained some experience with xflr5 and do understand all the basic polars and so on.

XFLR5 is able to set viscosity and density to water values and its scriptable so that i can do a form of parametric optimization.

sharpy is able to simulate aeroelastic wings but it doesnt seem to be able to set constants apropriate to water.

openaerstruct is able to simulate water, simulate deformations but i dont think its able to simulate time resolved deformations.

I guess vspaero is able to load water constants, but is it able to simulate wingdeformations or flutter?
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