Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Jul 20, 2023 21:47:08 GMT -5
Hello, I think it has to be around 13 gph judging off other builds?? Not exactly sure.
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Post by racket on Jul 21, 2023 0:08:28 GMT -5
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Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Jul 21, 2023 8:00:31 GMT -5
The 60 degree spread will work ok?? Should I put the primary flame tube holes a little closer to the exit to ensure proper mixing and burn? Thanks!
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Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Jul 21, 2023 9:37:17 GMT -5
I found 3 12.00gph 80 degree spread and ordered them. Thanks for the help!
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Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Jul 24, 2023 21:27:06 GMT -5
Hello, just wanted to double check, the best spot for the air coming out of the compressor to go into the flame tube is between the secondary and tertiary holes?? If so, should it be angled in a certain direction?? Thanks!
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Post by racket on Jul 24, 2023 23:20:31 GMT -5
Hi Ideally as low as possible for the delivery tube , on my GT6041 kart build jetandturbineowners.proboards.com/thread/78/garrett-gt6041-powered-kart I had the delivery tube ending in a section of "funnel" to spread the flow over a larger area around the outer can and have it delivered at the very bottom of the outer can so that the air flowed into a plenum area surrounding the tapered section of flametube , this allowed the air to spread out and "stabalise??" prior to it heading up the combustor to the various flametube wall holes so that they would all be served equally . No tangential/angled entry required , it can create problems . Cheers John |
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Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Jul 25, 2023 21:54:37 GMT -5
Hello, I was just wondering if the flame tube holes should be configured in the pattern on jet specs?? Can the tertiary holes be at the very end of the flame tube?? Thanks!
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Post by racket on Jul 25, 2023 22:28:39 GMT -5
There are ideal positioning , but if the Primary holes are at the theoretical point where the fuel spray would hit the wall it seems to work OK , Secondary holes need to be about mid way and Tertiary holes need to be far enough away from the turbine wheel to allow mixing of the cold air with the hot gases .
But if you want to "experiment" with placement, the outcomes are unknown .
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Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Aug 4, 2023 8:00:57 GMT -5
Hello! Was just wondering if the egt sensor should be located before or after the turbine inlet?? Thanks
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Post by racket on Aug 4, 2023 16:37:09 GMT -5
After the turbine wheel
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Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Sept 18, 2023 8:38:13 GMT -5
Hello!! Long time since my last post… have made major progress and am just starting some final combustion tests with a vacuum output hooked up to the intake of the combustion chamber. I was just wondering if there should be a flame coming out the end that could potentially damage the turbine wheel?? The temp was around 500 degrees Celsius.. Thanks for any help and insights!!
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Post by racket on Sept 18, 2023 16:23:47 GMT -5
Hi
There shouldn't be any flame from the combustor .
The atmospheric test will need a considerably reduced fuel flow due to the relatively low airflow rate compared to the running engine .
So just turn down the fuel a tad until the flame retracts inside, at which time you'll be able to observe whats happening inside and determine if the combustion appears OK
Cheers
John
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Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Sept 18, 2023 16:26:36 GMT -5
Ok!! I have a few pics I’ll try to post of the inside of the combust or after firing..
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Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Sept 18, 2023 16:35:20 GMT -5
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Jetman
Junior Member
Joined: August 2022
Posts: 81
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Post by Jetman on Sept 18, 2023 17:01:45 GMT -5
Oil system  |
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