experimental laminar flow stirling

[Funnyjake011]

volcanos=heat+sterling=? nvm, stupid idea

[littleseanx]

WHAT IS THIS I DONT EVEN

[0815tobey]

Why isnt the flame put under the wool? That would heat up that air faster

[aeropic]

No, the flame is at the right position in order to get the maximum rpm.

[RubinHood007]

have you got some paint of the model with the dimensions?

if yes can you send me?

[30GB]

help me how did you connect a con rod for the piston? i got a airpot too lol a free sample but they only gave me a piston, cylinder and seals

[efkperez]

i am juz curious on the test tube. time will come that the test tube will reach its limit to withstand heat, isn't it?

what's the diameter and lenght of the test tube by the way?

And with regards to the object/material inside, what is its effect to the intire system?

[MomanMorales]

The test tube size is 155x14mm. Using a single tube for both, working cylinder and heating chamber is possible, but the tube should be perfectly round to allow close fit of the piston. Such a configuration may require a small restrictor (baffle) near BDC as reported by other Lamina builders.

[vvv134]

can u tell me where you got the o rings.

[aeropic]

The O rings can be found in DIY shops they are the ones used for taps ...

[vvv134]

can u tell me where you got the o rings.

[nightelfkalimdor]

can we use sand in the place of steel wool?

[aeropic]

No, for sure it won't work with sand. you need a very conductive material (gold fibers would be the top ;-)

[cephalothorax]

Lots of fun!

[pplschmpion]

i have seen a piston-cylinder set from Stirling Outlet which resembles your construction. Did you have to machine your own piston for this project? Or were you lucky enough to find a source for pre-machined piston-cylinder?

[aeropic]

No, I bought a dashpot in AIRPOT corporation.

The stirling outlet graphite piston + cylinder is a very well priced item too.

[Thayersadsit]

what size is the choke and how did you calculate the size of it?

[aeropic]

I don't know the exact meaning of the word "choke" ... is it the distance (d) between the center of the wheel and the head of the crank, or the distance that the piston does (2d) !

That said, I answer on "d" ...

You've to set d quite large since you have to move a big amount of air inside the test tube (the air itself is acting as a displacer).

On this model, d = 16 mm while with d = 5 mm the motor doesn't run.

[desiredusername]

What the....

Where's the displacer?

[aeropic]

there is no displacer. Oscillations of the air column in the test tube allow to capture the heat stored in the steel wool which works mainly as a heat exchanger. Air successively expands and contracts which transfers the energy to the piston ... Magic isn't it ?

[desiredusername]

So it's like a free piston engine but the oscillating displacer is the air itself?

[aeropic]

As far as I understand yes !