Hi there, I'm Attila Blade, a huge fan of the DIY Stirling and hot air engines. You are currently on the Blade's World channel's blog.
I made a lot of experiments in the past 20 years from the beer can engines to a nicely machined desktop gadgets also I worked in professional projects worldwide.
You will find here DIY projects, homemade Stirling engine tutorials and interesting experiments, monthly as possible.
THX any help!
As you can see on this picture (FIG. 1), if you need to close a thermoacoustic standing wave engine, then the closed resonator part (right side) should be same length as left side, the sound generator base.
The whole system is a half wavelenght thermoacoustic engine.
The stack's center on the λ/8 exactly.
But what we can do with a mechanical resonator?
We can replace the whole resonator tube length( λ/4=4/8 of whole tube length) + the volume between the cold heat exchanger to the resonator tube ( λ/16= 1/8 length).
So what we can do?
We can replace the whole length 5/8th part.
That is nearly 2/3 of full length!
After we get a short engine like this:
Where the 104 is a buffer volume. This volume help for the gas flow going trough the 112 stack
also the 108-110 heat exchangers.
114 is the piston and the back side is a generator also "gas spring volume", or solid spring of course.
