Turbine Steam Car

[prallplatte]

Well, it´s going on:



My TedRobot inspecting the new enterprise:

Overview:

Sketch:

The turbine:

....will be continued

 

[jasonh]

Just watched the silver arrow in action. Audi should build that. It sounds weird to have a car with a steam whistle. Did you build the motor for that car or did you get it from somewhere? -jasonh

 

[prallplatte]

Thank you! The motor in the Audi is a Stuart SUN.

Today i was in the kitchen:

Detail Boiler

...to be continued...

 

[prallplatte]

Oh Hilde, Labour Day: Continuing with my cars:

Turbine with flywheel:

Tank clutch:

 

[prallplatte]

So, tonight i was feeling generous at times, test run the turbines: Half ceramic vers. full ceramic bearings. Half ceramic wins!

I guess that it was the plastic cover of the full ceramic. Which are apparently heat sensitive. The turbine slowed down after 20 sec steam. So tentatively extended. Were naturally bonded with Loctite 648th


The result?

Remember: 60 EUR! (= 6 boxes Radeberger bear!) later:

Tomorrow i make the next test run. If it should not have been the ceramics, i melt the whole project!

 

[prallplatte]

And now: some noise:


[ame="http://www.youtube.com/watch?v=MTeXWSFqAUA"]http://www.youtube.com/watch?v=MTeXWSFqAUA[/ame]

 

[prallplatte]

Well, that was something! Just had a test run. With reinforced spring in the clutch. And new gear reduction 1:4. And 1 kg of lead weight for the lacking aluskin.

First the good news:

- The clutch works!
- The racing car - and it's really one - sprints with about 8 km / h as devil. Even uphill! Madness!

Now the other side:

- Turbines also appear to be sensitive to water hammer. The steam dome - if one can even speak of it, is more of a tiny dome - and is backwards. When starting up there is water in the pipe, and indeed not even a little. Since I have still no superheater, the water comes in as 1:1 into the turbine. Now I have an ugly noise in that part, metal on metal. The revision will show. Pray with me ...

- The RC and the receiver are going to be melted. Denial of service. But i have enough spare spot.

- The butane tank temperature is a minor problem. But not a real one.

What remains to be done:

- Installing a superheater and hope that the turbine / bearing withstands the temperature. Furthermore, that the present performance remains despite then superheated steam (= less kinetic energy).

- Installing a three gear clutch. I have to extend one of their axes. Toi toi toi

 

[Entropy455]

I don’t understand your comment that super heated steam equals less kinetic energy.

Superheated steam will increase net power output from a turbine, not decrease it.

The design-goal for a steam turbine (either saturated steam, or superheated steam) is to install a convergent-divergent nozzle upstream of the turbine blades. The nozzle takes sub-sonic (and very hot steam), and converts it into a super-sonic flow of significantly reduced temperature and pressure. Thus the nozzle is the driving force within a steam turbine, as it turns useless heat energy into the required kinetic energy. It is kinetic energy that pushes the blades during the work-extraction process. Note: a properly designed steam nozzle is capable of very high degrees of thermodynamic efficiency, in converting thermal energy into kinetic energy.

Most steam nozzles are based on a hyperbolic-curve design, where the throat cross-sectional area is sized per the operating mass-flow-rate of the nozzle(s). Too much throat area, and your steam will never exceed Mach. Too little area, and you’ll choke the turbine’s ultimate power output.

One advantage of superheated steam is that you will reduce the chances of condensation within the turbine stage(s). A little bit of quality within a fast moving turbine has the same effect as bead-blasting the turbine blades with sand.

If you stick with saturated steam, I recommend installing a dash-pot to separate any condensate from your steam supply line – as just one water hammer can bend & crack turbine blades.

 

[prallplatte]

Thank you!

I don’t understand your comment that super heated steam equals less kinetic energy.

Superheated steam will increase net power output from a turbine, not decrease it.

I thougt there are generally two types of turbines: wet steam and dry steam.

Most steam nozzles are based on a hyperbolic-curve design, where the throat cross-sectional area is sized per the operating mass-flow-rate of the nozzle(s).

Mine is one of the non-most:

One advantage of superheated steam is that you will reduce the chances of condensation within the turbine stage(s). .

I fear that the ball-bearings in my turbine wont stand the temperatur of superheated steam. But nevertheless i have no chance: to avoid water hammer i must install a superheater.

 

[prallplatte]

Instead of drinking for Father's Day today in Germany I have built the superheater, model immersion heater - cozy after the melting of the FB. Test follows.

 

[prallplatte]

My anti-water hammer bypass almost naked:

and attracted ...:

Works fine!

btw: I can now also extend waves:

 

[rcfreak177]

Hi Kurt,

That is sooooo cool, I love the sound of a turbine and never knew that steam turbines sounded that good,
Thanks for posting this thread, something a bit different and not very common is great.

Can't wait to see it drive, I'm sure the little dressed up teddy bear you have pictured will be in for a wild ride.

Cheers,
Baz.

 

[prallplatte]

Thank you very much!

And now:

Hilde on Alu (Kiellegung):

The mystery picture??

 

[windy]

Very interesting I have a partly made steam turbine for my hydro and done test with the flash steam generator and various sizes of De-laval steam nozzles.
A thought if you had a steam generator like mine it could be very interesting but will your turbine stand the rpm without bursting also the temperatures.
Single rotor steam turbines if they have enough steam can rotate to dangerous rpm a Curtis type might be safer?
Keep experimenting.
Paul

 

[prallplatte]

A thought if you had a steam generator like mine it could be very interesting but will your turbine stand the rpm without bursting also the temperatures.

Thank you, i´ll hope so.

Meanwhile:

 

[prallplatte]

... some hours later:

Its now 2 meters long. Stay tuned...


btw: why did i call the projekt "The Needle" ?

Well:

 

[prallplatte]

3 km harness: I'm going crazy. But nothing helps: pure he must, even if we both cry ...:

 

[jwcnc1911]

That is just awesome! I don't know, but based on appearances... I'd bet money it'll run 200mph!

 

[prallplatte]

Thank you!

Thus, final in the offing. Here are a few preliminary images:

 

[Septic]

Marvellous creation..... Congratulations...