miuge
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Post by miuge on Feb 14, 2017 16:57:53 GMT -5
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miuge
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Posts: 199
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Post by miuge on Feb 14, 2017 16:27:44 GMT -5
That's true, precise positioning would be needed with nozzles like this and probably the evaporator inlet should be shaped differently too. I'll gather some data with different pressures and try to take some photos of the pattern with lower pressures. This combo will most likely go to my car project (as water injection system), I machined that nozzle holder and sleeve to fit on the bottom of the intake manifold. It's good to practise some welding before starting the ultimate turbine project
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miuge
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Post by miuge on Feb 14, 2017 15:14:33 GMT -5
Quick test of the pump and nozzle, didn't have a gauge or properly sealed bits yet, but that doesn't look so bad?
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miuge
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Post by miuge on Jan 16, 2017 10:05:17 GMT -5
Hi all, I ordered a diaphragm pump and some oil burner style nozzles for experimental tests. I want to know if I could use those oil burner style nozzles (without an excessive pressure) in an annular combustor instead of syringe needles. The pump is rated 10bar max and nozzles are ~400 and ~600cc/min @5bar, pictures indicate a very fine mist. Anyway if it's not a functional idea, I can use it as water injection system in my car project
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miuge
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Post by miuge on Jan 7, 2017 6:55:07 GMT -5
Hi Stephan,
Get a new HX80 or HC5A with a single scroll housing from alibaba, they're around $500 incl. shipping.
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miuge
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Post by miuge on Dec 29, 2016 19:45:38 GMT -5
Hi again, One thing I completely missed earlier was that larger wheel has a 11 blade design and smaller one is 13 blade, what's the difference? Another thing I have no clue about... Anyway if I was about to go with the bigger wheel, this would bring it even closer to TV94 wheel, which is apparently a 11 blade too.
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miuge
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Post by miuge on Dec 29, 2016 7:29:34 GMT -5
Thanks for your answers Chris and John! Things getting more clear now Might need to order some parts soon...
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miuge
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Post by miuge on Dec 28, 2016 20:33:48 GMT -5
Hi John,
That's pretty much what I was thinking about tip height vs. PR design, but when it comes to choosing a matching wheel in a gas turbine things become more complex...
Now if I say I'm looking for the best peak power, should I choose X846 instead? There's even a X844 wheel with a 6.60mm tip height... Is it too much, in to out ratio being 2.75:1 ?
Is there any gain using the 129/112mm turbine wheel instead of smaller 125/106mm? Seems like they're both made of same alloy, bigger wheel manufacturer has been in turbo business since 2008 and another since 2002. Both look OK in the pictures. No major difference in price neither.
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miuge
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Post by miuge on Dec 22, 2016 18:20:37 GMT -5
Hi John, Well I have to think about if it's worth going higher PR or not. There's no ultimate goals for the project nor budget defined, but usually I try to save the last penny wherever possible Price for the 129/112mm turbine wheel was just a tad over $100... Now that I tried to google about K418 material it seems that's equivalent to Inco 713C? Or just "chinese equivalent"? Then, while I stuck looking at 106mm comp wheels, X856 seems to be similar to Anders' X846 but has 3mm more tip height. Does it have more flow but less PR capability? Moreover about the design I'd like to do a combustor surrounding the exhaust, HX82 shaft being very short that way I could add some length and ensure proper combustion. Also had an idea of oil burner nozzles spraying fuel into evaporators after seeing "problems" with syringe needles.. I remember someone here had two inline fuel pumps in series? Does it multiply the pressure as supposed to by the theory or is there some restrictive factors?
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miuge
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Post by miuge on Dec 22, 2016 7:27:52 GMT -5
Hi John, Okay that's good news! I've been looking at comp wheels in that size range, I don't want to take a risk using those "oversized" variations There's 106mm comp wheels with both 141mm and 152mm exducer, smaller one being $100 cheaper. What kind of difference in power output are we talking about comparing these two? JU-02 seems to have X846 which is 106 x 152mm.
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miuge
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Post by miuge on Dec 22, 2016 1:50:37 GMT -5
Hi John, I think that Inco 713C wheel is 125/106mm 13 blade based on the part number, K418 material wheels are available in 129/112mm dimensions, haven't found that bigger inconel variation.. Should I get a wheel for closer inspection to see what comp would be a good match? Got the sheet for the inco wheel:
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miuge
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Post by miuge on Dec 21, 2016 5:43:00 GMT -5
It was a quick project, also the first one, but I can't deny it was fun whenever it worked I have found an Inco HX82 wheel for less than $200, it should be a good start if nothing better appears, anyway there's countless compressor wheel options for that shaft.
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miuge
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Post by miuge on Dec 20, 2016 5:04:55 GMT -5
Hi everyone, It's been about a year since my last post in this thread, nothing groundbreaking yet.. I've been learning to 3D print parts and things looking promising so far, now I'm sure I could utilize it in my next build. Some printing and welding pictures gathered on my "personal" fb page: www.facebook.com/mrttuotteet/Occasionally I've been searching for +100mm comp turbochargers, in fact I made a new inquiry today to see if we get any results.. Still thinking HE851 and HC5A -series (found some Garrett TV turbos too), but not going to buy a complete unit, just a chra or wheels only if available... a long term "micro" turbine, hmm...
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miuge
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Post by miuge on Nov 25, 2016 11:43:44 GMT -5
Hi Feathers, Just read about your pump issues, they're definitely not suitable for the application right from the box. Removing the thermal breaker might work for a moment, but you might encounter problems with melted/deformed end cap. I think there's no upgrade caps available, therefore we made the aluminium version by ourselves. Remember to isolate motor brushes from the cap if you end up making our own and DO NOT use plastic
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miuge
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Joined: March 2014
Posts: 199
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Post by miuge on Nov 25, 2016 11:31:13 GMT -5
I hope you get improved results with the LPG manifold. If it works, would you consider adding "swirl tubes" in those primary holes? 90deg bent tubes catching the flow coming from the comp and directing it the same way as your LPG needles.
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