Twin inline thermoacoustic Stirling engine

A thermoacoustic Stirling engine with twin cylinders, powered by two small methylated spirits burners.

Heating one end of a tube of closely coiled wire (a "stack") causes the stack to resonate, and generate sound waves (these sound waves are inaudible to the human ear).

Sound waves are basically fluctuations in pressure, and we can use these fluctuations in pressure to drive a piston in and out.

Connecting the pistons to a flywheel is not necessary, the pistons will oscillate in and out without a wheel, but the engine is more attractive with a rotating wheel.

Category:

Education

Tags:

• acoustic
• air
• engine
• hot
• lag
• lamina
• stirling
• thermo
• thermoacoustic

[1967geezer]

Inner material is stainless steel pot scourer.

Re: inefficient design - in this small scale model, there are no problems... the engine runs... it is only a model... just meant to demonstrate the principle.

[MHJNijhof]

Why did you push the little button on top of de stand before moving the flywheel??

[jackandrei]

to hava a thermo acoustic Stirling engine, instead of the flame you must have a speaker or another device that makes a sound. the sound wave created will displace the gas, aheat exchanger and so on. this is just a regular Stirling engine

[abdx7777]

what is the uotput of this engine

[correocasa3]

looks beautiful!

[voyager2020]

whats the material present in the test tube

[whiteknightef]

In efficient design sorry. The pistons are not timed to the expansion of the heated gas. one piston is pushed against the other or away from the other against the will of the expanding gas, on a large scale it would break at the high pressure areas.

[cipher0]

Put both flames on one engine and see if the other engine gets super cold.

[harmsub]

push-pull

[apilmenevo]

what exactly is it that you're heating up inside the glass tube?