Unknown..

[richardm]

I started digging in my junk box that was ignored for maybe 20 years or so.. Found this turbine wheel I bought back then from E bay. About 140 mm in diameter Blades are 19 mm long  40 of em shaft is 12 mm with very fine spline

Anyone has an idea about what it comes from or its use? Don't know either about the alloy its made of  Only that its non magnetic..

[richardm]

Same story for this compressor wheel   124 mm inducer  about 190 exducer  Splined front and back
Did a search  Model number leads nowhere

[racket]

Hi Richard

Compressor wheel looks like its a pretty high pressure unit with all those blades and decent sized curvic , could be part of multistage comp , don't know , but its sure is nice :-)

Turb is more "interesting", does it look fully machined or cast blisk ??

Mount them on the wall as conversation pieces :-)

Cheers
John

[richardm]

Yeap Looking at the compressor wheel I think its probably from a two spool engine . With hollow hub trough witch another shaft could pass and that wheel itself with its coupling "teeth" on both sides being attached to a second larger shaft..
If its a high pressure design do you think it could be of any use in an home made single stage engine Or would its mass flow be too low ? And then what turbine size would it need to perform?..

About the turbine wheel it is a cast wheel from what I can see from the blades Only the center of the wheel is machined and looks like it has been balanced

I was thinking of using it either on a future engine or maybe as a free turbine second stage on the engine im building.nBut I dont know which alloy its made of so Im reluctant about heat and stress.

[finiteparts]

Hi Richard,

The turbine looks to me to be one out of an air turbine starter.   Splines on the bore of a turbine disk would add some really challenging stress concentrations at the highest stressed region.   Generally, the disk bore needs to be super smooth and polishes so as to not introduce local stress concentrations that could lead to LCF fractures fromt he bore.   Also, the two opposed grooves don't seem like anything a high work wheel would have on it, also due to local stress concentration.

The impeller looks a lot like the GTCP36-300A that I have, but the hub is a bit longer in front of the inducer.   My inducer is 134mm and the exducer is 196.8 mm.   Close but not exactly the same...but there are so many versions of the GTC/P-36, I would still lean that way.  What is the part numbers?  Mine is: 3822251-6.

The forward curvic coupling is for the connection to the load compressor.

Good luck,

Chris

[richardm]

Part # is 3822150 and my search only filed this result www.fipart.com/search?q=3822-15
Your assumption about the turbine make sens. I was also thinking about it as part of an air cycle machine..

[ncjetengine]

Hello If I had these parts, I would design a large turbojet and run it


Kind regards

[richardm]

That went across my mind when I bought them many years ago. Stored and forgotten since. They're back in my mind now and Im trying to figure out if they would be suitable for an home made engine. Not quite sure about the material the turbine is made of. Not sure either if the compressor is efficient enough. It looks like it s designed for high pressure but low flow from the number of blades I might be wrong. If anyone knows about that please shed some light. Also could the turbine be matched to that compressor ? Don't have enough knowledge to figure this out

[richardm]

Here s another quizz.. This one is a two part compressor wheel
Bears # GB8 3535.. Seems to have a labyrinth seal on the inducer side About 130mm inducer and 190 ex
20 full blades No half blades

Anyone seen something similar before ?

[turbotom]

I'm pretty certain that your turbine wheel had been part of an air condition pack assembly. I've got a very similar wheel as part of an A/C pack rotor that I had been given by a friend at least two decades ago. He told me to have found it at a scrap yard that was also processing aircraft remains. I'm afraid the alloy the turbine wheel is made of most certainly won't withstand the temperatures that turbine engine hot ends are subjected to. Also, to judge from the over-all design of the wheel (or the whole rotor in my case), this assembly doesn't seem to be designed to spin as fast as required for a "useful" turbine engine. It's a nice display piece anyway, but I guess you purchased it with other intentions in mind...

[richardm]

Thanks for your input. I tough it could come from an air cycle machine too. Mine looks brand new with some red color marking on the tips of the blades. Its probably cast from stainless since its not magnetic but can't tell the specific alloy. ACM see " hot bleed air up to about 400° F. That of course is a far cry from the requirements in an engine. But maybe it would be good enough for a second stage free turbine kind of use since the first stage cool off the gases a bit...And stainless is not inconel of course but is still pretty strong, corrosion and heat resistant to a certain degree.
I purchase it maybe 20 years ago on bay. Back then I was gathering parts. But most of the time those Ebay parts description is not extensive and buying is taking a guess.

Thanks again

[racket]

Hi Richard

Just sent you a PM

Cheers
John

[richardm]

Another item from my junk  A GTC 43/ 44 APU  Got it about 20 years ago I was thinking of adding either a tail pipe to get some thrust or a power turbine...

[enginewhisperer]

that's pretty cool!

[richardm]

This was the first gas turbine APU ever designed in 1948. Mine was built in 52. Missing some parts but I could probably make it run without em..
Tje problem with that design is that the two combusts are independent, not interconnected. It happened that only one would light up , the other one spitting air and fuel mixture in the turbine scroll..
Must have been quite a hot start..