CH3NO2
Senior Member
Joined: March 2017
Posts: 455 
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Post by CH3NO2 on Mar 14, 2018 22:39:22 GMT -5
No, not really. Would be nice though. At least I would have an excuse for switching c to m. For Lent I came up with this brilliant idea that I would give up all alcohol consumption until Easter. Only 2 more weeks to go but dreading all of it. Guaranteed I'm opening up a cold one on Easter. Or maybe 3.  |
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Post by azwood on Mar 15, 2018 3:00:41 GMT -5
So I get the ft holes now one question if I'm using a lpg nozzle first then evap tubes once I get it to run can I make those 10 primary holes quite close to the top say 40/50mm and add that remaining 10% to the top of of the ft cap as small holes the gas jet I'm using shoots upstream so I will impact the same spot as the vape tubes or is it one or the outher
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Post by azwood on Mar 15, 2018 3:34:55 GMT -5
To give you more idear of the spray angel  |
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Post by azwood on Mar 15, 2018 4:09:15 GMT -5
To give you more idear of the spray angel Also have thease ones if they would be better for gas |
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Post by azwood on Mar 15, 2018 4:09:52 GMT -5
😊  |
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Post by racket on Mar 15, 2018 4:33:56 GMT -5
Hi
Now if you want to use vapourisers then the whole flametube design in the Primary and Secondary Zones will be different to a single spray nozzle setup, we need to decide on what we want to use , and design accordingly .
Cheers
John
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Post by azwood on Mar 15, 2018 18:37:44 GMT -5
Hi Now if you want to use vapourisers then the whole flametube design in the Primary and Secondary Zones will be different to a single spray nozzle setup, we need to decide on what we want to use , and design accordingly . Cheers John Exactly what I thought that was the case because it's going in a bike log,s not going to work wonce it's in no space for a gas tank so I guess jet fuel or diesel is my only option so evap tubes it is.so I just need to know where the zones should be for that setup |
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Post by azwood on Mar 15, 2018 18:39:33 GMT -5
Because I have a air gap around the top of my ft holes in the top is an option
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Post by azwood on Mar 15, 2018 18:52:02 GMT -5
I see the bigger primary holes you have verry close to the top corisponding with the vape tubes is this set up for jet fuel  |
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Post by racket on Mar 16, 2018 0:26:30 GMT -5
Yep , the GT6041 was setup for kero/diesel/JetA/heating oil , whatever :-)
There were 6 vapourisers so there were 6 sets of 2 holes that discharged across the outlet of the vaps, I like using twin holes per vap as theres no need for deep penetration but there is a need for more localised turbulence I feel .
The second row of "big" holes are still Primary Zone holes , theres a single larger hole between each evap and that hole is "bent" upwards to promote a discharge flow towards the FT cap , the couple of smaller holes in between are "normal" along with the small wall cooling holes.
The third row of large holes is the Secondary Zone holes with varying diameters to promote different depths of penetration .
Lastly the really big holes are the Tertiary holes .
Theres some small holes around the bottom the "funnel" where the slipjoint into the turbo is , this was to provide some wall cooling at this point to minimise expansion and reduce the risk of the slipjoint "seizing" as it was a reasonable fit into a thick "coolish" running mild steel plate that was the bottom of the combustor and the mount for the turb scroll foot .
My "funnel " was longer than whats strictly necessary , but it did mean a greater plenum volume from which the air could spread out to the various wall holes with ease.
LOL .............all my flametubes are "individuals" , they're simply what I feel like making at the time , theres some basic rules I keep to but I like trying different designs
Cheers
John
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Post by azwood on Mar 16, 2018 4:26:08 GMT -5
Yep , the GT6041 was setup for kero/diesel/JetA/heating oil , whatever :-) There were 6 vapourisers so there were 6 sets of 2 holes that discharged across the outlet of the vaps, I like using twin holes per vap as theres no need for deep penetration but there is a need for more localised turbulence I feel . The second row of "big" holes are still Primary Zone holes , theres a single larger hole between each evap and that hole is "bent" upwards to promote a discharge flow towards the FT cap , the couple of smaller holes in between are "normal" along with the small wall cooling holes. The third row of large holes is the Secondary Zone holes with varying diameters to promote different depths of penetration . Lastly the really big holes are the Tertiary holes . Theres some small holes around the bottom the "funnel" where the slipjoint into the turbo is , this was to provide some wall cooling at this point to minimise expansion and reduce the risk of the slipjoint "seizing" as it was a reasonable fit into a thick "coolish" running mild steel plate that was the bottom of the combustor and the mount for the turb scroll foot . My "funnel " was longer than whats strictly necessary , but it did mean a greater plenum volume from which the air could spread out to the various wall holes with ease. LOL .............all my flametubes are "individuals" , they're simply what I feel like making at the time , theres some basic rules I keep to but I like trying different designs Cheers John Well you have helped a lot so I'll just get cracking I can make another ft if need be i have the basic idear now I'll just build the thing and see what happens that's part of the fun I guess I was thinking 6 vape tubes to for a more even spread of the chamber I'll just see how she goes |
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Post by azwood on Mar 16, 2018 18:56:39 GMT -5
Anybody have a pic of swerl holes in the top of a combination chamber do they go in a J shape ?
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Post by racket on Mar 16, 2018 22:29:12 GMT -5
Nope , just flat plates will do the job , similar to our NGV for the turb wheel , as long as the air is made to turn around an axis ( fuel nozzle)
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Post by azwood on Mar 17, 2018 1:17:40 GMT -5
Nope , just flat plates will do the job , similar to our NGV for the turb wheel , as long as the air is made to turn around an axis ( fuel nozzle) Cool thanks mate been busy in the shed I'll post pics soon |
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Post by azwood on Mar 17, 2018 21:07:54 GMT -5
Looking at fueling still tested those jets I have they don't atomise at all should have known that but some days your the dog some days your the fence post.has anyone used a fuel injector and just had a switch to keep it in the open position.it just seems that the better I can atomise the fuel the better everything will work with the vape tubes
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