CH3NO2
Senior Member
Joined: March 2017
Posts: 455 
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Post by CH3NO2 on Jul 27, 2017 22:19:09 GMT -5
Great job Erik!
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nersut
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Joined: September 2012
Posts: 223
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Post by nersut on Jul 30, 2017 8:45:35 GMT -5
Thank you Tony  (Nitromethane)  |
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nersut
Veteran Member
Joined: September 2012
Posts: 223
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Post by nersut on Jul 30, 2017 9:07:26 GMT -5
Yesterdays work Dome piece done, drilled & swirling flaps SECURELY welded  First i just tag welded the flaps with three spots, but didn't want to ruin the turbine wheel if one of the flaps comes loose so i welded them extra securely. Really ugly but they should not fall of easily. I hate welding small & 1 mm thin pieces with a MIG-gun.      The three inner holes (18) is 5 mm in diameter & the outer ones (36) are 3 mm in diameter, total flow area is about 10 % of inducer area.  The flange for the combustor outer casing is also welded on. Cheers Erik |
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Post by racket on Jul 30, 2017 16:06:26 GMT -5
Hi Erik
Progressing nicely :-)
Cheers
John
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Jul 30, 2017 19:55:01 GMT -5
I love the irony of using fire extinguishers for flame cans. |
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nersut
Veteran Member
Joined: September 2012
Posts: 223
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Post by nersut on Jul 31, 2017 20:40:02 GMT -5
Hi Erik Progressing nicely :-) Cheers John Yeah, I am trying to keep the build going, step by step going closer towards the first spool up Cheers Erik |
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nersut
Veteran Member
Joined: September 2012
Posts: 223
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Post by nersut on Jul 31, 2017 20:43:40 GMT -5
I love the irony of using fire extinguishers for flame cans. "Fire activator can"  |
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nersut
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Posts: 223
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Post by nersut on Jul 31, 2017 21:09:11 GMT -5
Slight changes to the elbow piece, I decided to use a 90 degree bend tubing instead of box type for the elbow. Smoother/better flow?I also decided to make the combustor section more modular for easier access, modifications & repair/replacement if needed. CAD-sketch coming soon.The combustor outlet elbow & combustor liner will each have a smaller flange, sandwiched & bolted between the main flange/combustion outer casing (bottom end cap). Here is also a nice oil filter housing for the turbo.   If the turbine build fails there is always room for a turbocharger under the bonnet.  Cheers Erik |
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nersut
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Posts: 223
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Post by nersut on Aug 1, 2017 23:49:18 GMT -5
Some more progress today. The "modular" flange connections is finished. Bolted with eight 10mm bolts & with a V-band clamp.     Smooth transition from combustor liner to the elbow.  Still need transition pieces from the elbow to the turbo inlet & from the compressor outlet to the combustor outer casing.   Cheers Erik |
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Post by Johansson on Aug 2, 2017 1:37:26 GMT -5
Looking really nice!
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Aug 2, 2017 9:49:26 GMT -5
It's coming together! Can't wait to see this one fire up.
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nersut
Veteran Member
Joined: September 2012
Posts: 223
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Post by nersut on Aug 3, 2017 21:27:43 GMT -5
Thank you, but not as sophisticated & nice as your fine jet builds, but hopefully a stabile & running engine at the end. |
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nersut
Veteran Member
Joined: September 2012
Posts: 223
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Post by nersut on Aug 3, 2017 21:31:07 GMT -5
It's coming together! Can't wait to see this one fire up. I am too excited for the first spool up, but I need to finish a "couple" things first.  Oil, fuel, starter, ignition etc. |
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nersut
Veteran Member
Joined: September 2012
Posts: 223
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Post by nersut on Aug 3, 2017 21:45:02 GMT -5
The combustor elbow is now connected to the turbo, made a short transition piece.  Question: For the compressor discharge pipe is a flexible hose/gab a MUST/necessary for thermal expansion? If not, I have in mind to connect a v-band clamp from the compressor discharge pipe to transition piece for the combustor outer casing (direct end-to-end flanges). Cheers Erik |
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Aug 3, 2017 22:31:48 GMT -5
Hi Erik,
You probably should use some kind of stress relief to accommodate the expansion and contraction the assembly will encounter.
That elbow going into the turbine housing will be moving and curling with every thermal cycle. Especially if its stainless steel.
Great job!
Tony
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(Nitromethane) 
Oil, fuel, starter, ignition etc.