Simscape Gas Inertia block

2 次查看（过去 30 天）
Caleb McFarlane
Caleb McFarlane 2024-2-29
回答： Yifeng Tang 2024-3-27
I’m trying to model gas acoustics in a pipe network, similar to the work Travis Weins has done for fluids but for gas. Has anyone made a gas inertia block similar to the one for Simscape Hydraulics? How would I go about creating my own?

请先登录，再回答此问题。

回答（2 个）

Abhinaya Kennedy
Abhinaya Kennedy 2024-3-27
Hi Caleb,
I see that you would like to create a gas inertia block, I have found a link to MathWorks documentation that details out the step-by-step process of creating a custom Simscape block with examples: https://www.mathworks.com/help/simscape/lang/creating-custom-components.html
You can also look at the link below that talks about upgrading custom hydraulic blocks to use the isothermal liquid domain. This might help in modelling similar blocks and upgrading them to the gas inertia domain.
https://www.mathworks.com/help/simscape/ug/upgrading-custom-hydraulic-blocks-to-use-isothermal-liquid-domain.html
Additionally, this page gives you an overview of the whole process: https://www.mathworks.com/help/simscape/creating-custom-components.html
Hope this helps!
Yifeng Tang
Yifeng Tang 2024-3-27
Hi Caleb,
"Fluid inertia is negligible." is one of the model assumption of the Pipe (G) block.
You may be able to modify the code the Pipe (G) block by adding the m_dotdot term to the momentum balance equation. You can find the equation in the doc page of e.g. Pipe (IL) block. The source code for these blocks are visible so you can use them as starting points.
That said, it's still an open question how many pipe blocks you'll need to track the travel of the pressure fluctuations (sounds). In general, we'd want to avoid to use Simscape in a CFD fashion.
Another thing to consider: are you just interested in the acoustics or it's acoustics + flow dynamics inside the pipe. If it's the former, a custom acoustic physical domain may be a more appropriate approach. Still lots of work though.

类别

在 Help Center 和 File Exchange 中查找有关 Gas Models 的更多信息

标签

产品


版本

R2023b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by