how do you model a stirling engine

Question

amna AL ali 2019-3-23

3
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https://ww2.mathworks.cn/matlabcentral/answers/451823-how-do-you-model-a-stirling-engine

回答： Steve Miller 2022-12-20

Hello, Im a mechanical student and im just learning matlab/simulink. I have a stirling engine project that i need to use simulink or matlab on to analyze the performance of the engine.

Basicly, i want to be able to input the following:

Maximum temperature: 500K
Hot piston intial position: 20mm away from the refrenece point.

The engine has the following components, it being an alpha engine:

a hot cylinder
a hot piston
a cold finned cylinder
a cold piston
a heat exchanger regenrator that connects the cylinders
a crankshaf that connects the pistons
a flywheel that connects to the crankshaft
a generator that convertys the torqu to power

from the system im building, i want the follwoing outputs:

temperatures inside: hot cylinder, cold cylinder, regenerator
Pressure inside: hot cylinder, cold cylinder, regenerator
Volume of air inside: hot cylinder, cold cylinder, regenerator
Frequency of: hot and cold pistons
Torue of the flywheel
power generated
position of hot and cold piston

The stirling engine follows a stirling cycle, where if the hot cylinder is under full expansion, the cold cylinder is in parial expansion moving in the direction of full expansion. And vice versa.

I have created the engine in solidworks and have it fully assembly. I was able to use simmechanics to import it and animate it. But im not sure how to go from there to creating a system that reciecves those inputs.

Thigs i found difficult are:

how to combine the pistion position to the area to be used in the heat transfer equation.
how to relate the hot pistion movement to the cold piston movement
how to generally create block systems.

please help me im in dire need, i spent the past 2 days trying to do it.

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Fernando Gonzalez 2020-2-17

Hi I study mechanical too and I have the exact same project, I need to generate some graphs with those values and make a detailed analysis of it, do you have any information of how to do this matlab?

I hope you can help me, mi teachers don't help to much.

Jacob Billingham 2020-2-21