Doublet Panel Method Help

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In summary, the most important part of the code for predicting pressure distribution around a NACA 0010 foil is setting up the doublet distributions correctly. It is also important to check the boundary conditions and numerical methods used. If the correct pressure distribution cannot be obtained after checking these factors, it is best to seek help from someone with experience.
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pcgamer549
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Hi,

I'm trying to predict the pressure distribution around a NACA 0010 foil using doublet distributions (using MATLAB). I can get the correct Cp prediction for a circle but when I transfer it to a airfoil shape I cannot get a correct Cp curve. I have tried modifying the Kutta Conditions to no avail. I have checked my doublet equations with a single plate and validated that my doublet equations are working correctly. I have looked in the Katz "Low Speed Aerdynamics" Book, but again to no success.

I have been debugging this for nearly 2 weeks and I no longer think I can be able to find the bug myself (I have a hunch that the mistake is simple, and I'm just overlooking it...).

I attached my code (at least I hope I did) to this post. Any help would be appreciated...Thanks!
 

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</code>The most important part of your code is the part which defines the doublet distributions. In order to get the correct pressure distribution around the NACA 0010 foil, you need to make sure that the doublet distribution is set up correctly. You should also check your boundary conditions and make sure that they are set up properly. Additionally, you should check the numerical methods you are using (e.g. finite difference, finite element, etc.) to ensure that they are converging correctly. If you have checked all these things and still cannot get the correct pressure distribution, then it is likely that you are either missing something subtle in your calculations or you are making a mistake in your code. In this case, it would be best to get help from someone who has experience with this kind of problem. Good luck!
 

What is the Doublet Panel Method?

The Doublet Panel Method is a numerical technique used in computational fluid dynamics to solve for the flow around a two-dimensional body. It is based on the theory of potential flow, where the flow is assumed to be irrotational and inviscid.

How does the Doublet Panel Method work?

The Doublet Panel Method involves dividing the surface of the body into panels, which are assumed to act as sources or sinks of fluid. The method then solves for the strengths of these panels, taking into account the flow tangency condition and the Kutta condition. The resulting flow field can then be used to calculate lift, drag, and other aerodynamic properties of the body.

What are the advantages of using the Doublet Panel Method?

The Doublet Panel Method is relatively simple and easy to implement compared to other computational fluid dynamics methods. It also provides a good approximation of the flow around a two-dimensional body, and can be used to study the effects of different body shapes and flow conditions.

What are the limitations of the Doublet Panel Method?

The Doublet Panel Method is limited to two-dimensional flow and does not take into account three-dimensional effects, such as spanwise flow. It also assumes an inviscid flow, so it cannot accurately model boundary layer separation or other viscous effects. Additionally, the results of the method may be less accurate for bodies with complex geometries or at high angles of attack.

Where is the Doublet Panel Method commonly used?

The Doublet Panel Method is commonly used in the aerospace industry for the preliminary design of airfoils and wings. It is also used in marine engineering for the design of ship hulls and propellers. The method is also used in educational settings to introduce students to computational fluid dynamics and potential flow theory.

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