TurboJet Engine FROM SPARTA ( GREECE)ANY INFORMATION WILL ΟΚ

[spartablades]

HELLO everybady
 i m starting that project ..first of all i have a big turbo from scania with inducer diameter 7,4 cm
a lot of questions 
that I had is solved

see here : 
firts of all that project will burn

basically a kerosine ( but it will start with propane) 

my flame tube i calculate is : 14,8 diameter and 44,5 cm lenght

the combustion cumber will be : 20cm diameter and 44,5 lenght
 
now firts question i have is:
1 ) how must be the air gap
between flame tube & combustion cumber? 



2) how much must be the 

thickness ( flame tube thickness & combustion cumber thickness)

that is my question for now...thank you all of you...
( i can say all of my project all of you can saw that to my youtube channel:  Spartan Blades FPV)
www.youtube.com/channel/UCDxCdaTpb_FUvczoCGi5QMg?view_as=subscriber

[racket]

Hi

NO air gap , ALL air MUST pass through the flametube holes , you need a rattly slip joint at the turbine end of the flametube to accomodate axial expansion of the flametube , and a smooth transition piece between flametube cross section and the scroll inlet .

Flametube sheeting , stainless steel of 1mm thickness to cope with the heat , outer can needs to be a "pressure vessel" so whatever is required , it using commercially available 200 mm tubing then at least 1mm thickness will probably be OK , if rolling and welding something yourself then maybe go a tad thicker at 1.5mm

Cheers
John

[spartablades]

Mar 10, 2020 16:17:58 GMT -5 racket said:

Hi

NO air gap , ALL air MUST pass through the flametube holes , you need a rattly slip joint at the turbine end of the flametube to accomodate axial expansion of the flametube , and a smooth transition piece between flametube cross section and the scroll inlet .

Flametube sheeting , stainless steel of 1mm thickness to cope with the heat , outer can needs to be a "pressure vessel" so whatever is required , it using commercially available 200 mm tubing then at least 1mm thickness will probably be OK , if rolling and welding something yourself then maybe go a tad thicker at 1.5mm

Cheers
John

NO air gap???could the air gap be my mistake ... bypass section?

[racket]

No bypass section .............thats an old design , not used anymore as the "gap" area will vary depending of the different expansion rates etc etc , if all air goes through the wall holes the division of airflow remains constant

[spartablades]

Mar 10, 2020 16:56:08 GMT -5 racket said:

No bypass section .............thats an old design , not used anymore as the "gap" area will vary depending of the different expansion rates etc etc , if all air goes through the wall holes the division of airflow remains constant

what should I do with this blank, should I seal it?

[racket]

Yes , you need a slipjoint so that axial expansion of the flametube can be accomodated, all air must go through the flametube wall holes , some minor "leakage" at the slipjoint is OK

[spartablades]

Mar 11, 2020 19:57:09 GMT -5 racket said:

Yes , you need a slipjoint so that axial expansion of the flametube can be accomodated, all air must go through the flametube wall holes , some minor "leakage" at the slipjoint is OK

can i found somewhere diagrams about the throttle ? i mean how increase and decrease the rpm? or somebody explain to me?
firts to tha start run i will use propane... the increase /decriese of throttle example is for the bottle with liquid (photo 1)
after ..when kero start how i use throttle ?
my plans in my mind is... the fuel injection i think use a beck from car fuel injection (photo 2) ...pump from car too ( photo 3)... now the throttle increase /decrese? electric with pontetiometer photo 4  or mechanic photo 5 ?

[spartablades]

and something else ...what is the circuit of oil way? is there a diagram for oil movement ?

[racket]

Same as on an IC engine, ........... oil tank , suction line to pump , pump , pressure relief , oil filter , pressure line to turbo (through optional oil cooler), oil pressure reader at turbo oil inlet , oil through turbo , gravity drain back to tank or use a scavenge pump

As for fuel throttling , have your read the relevant Section here jetandturbineowners.proboards.com/thread/680/diy-turbines

[spartablades]

Mar 27, 2020 1:42:06 GMT -5 racket said:

Same as on an IC engine, ........... oil tank , suction line to pump , pump , pressure relief , oil filter , pressure line to turbo (through optional oil cooler), oil pressure reader at turbo oil inlet , oil through turbo , gravity drain back to tank or use a scavenge pump

As for fuel throttling , have your read the relevant Section here jetandturbineowners.proboards.com/thread/680/diy-turbines

hello... 2-3 questions again... 
 1) for that project i must  necessary to use stainless steel hoses for the combustion chamber?
2) 
dimensions : flame tube 45cm lenght 14,8 cm diameter  and how much you thiny to use a thickness? 
comb cumber : 45cm lenght 20cm diameter ...and how much thickness?
3) thickness about 

thickness for that's pieces:





4) the hole frome intake to combustion must be to the center 
or
the side of the tube; what  is better? 1 or 2 and why 




THHAANNNNN YOU

Personally racket

[racket]

Hi

Flametube is preferably made from stainless steel sheet of 1 mm thickness, it must be a bit thicker, maybe 3mm , if made from mild steel tubing so as to cope with the heat/flames

The outer combustor can will need to hold the air pressure , so use 20cm steel tubing of at least 1.5mm thickness.

The air delivery tube needs to be attached as per #2, straight in at center.

You have a number of mounting points in your combustor cap , do you intend uding multiple fuel injectors ?

Cheers
John

[spartablades]

so the outer tube: stainless steel with a thickness of 2mm



and inner (flame tube) 1.5 mm stainless steel tube




now for how many injectors I will need to install I do not know..because in my mind I am planning to put 1 or 2 injector injectors from a car

how thickness you think ?

[spartablades]

Apr 10, 2020 17:46:11 GMT -5 spartablades said:

so the outer tube: stainless steel with a thickness of 2mm



and inner (flame tube) 1.5 mm stainless steel tube




now for how many injectors I will need to install I do not know..because in my mind I am planning to put 1 or 2 injector injectors from a car

how thickness you think ?

[racket]

Automotive injectors probably won't survive the heat, the endcap they will be mounted in can run red hot

[spartablades]

Apr 10, 2020 20:11:26 GMT -5 racket said:

Automotive injectors probably won't survive the heat, the endcap they will be mounted in can run red hot

Something else as idea for nozzle?