flametube design

[spartablades]

hi i m new here ..i m start to build that project ..a have a turbo with intake ( inducer diameter 7,4 cm)
i want start to fix tha flame tube ... is there somthing like calculator to have all dimensions about flame tube ... about combustion camber ..the holes around the flame tube? i found a calculate to internet but i want to be sure about that project thank you
my facebook: www.facebook.com/sakelaropoulos
my youtube channel: www.youtube.com/channel/UCDxCdaTpb_FUvczoCGi5QMg?view_as=subscriber

please i want directly to your advice .. thaankkkkk youuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

[racket]

jetandturbineowners.proboards.com/thread/680/diy-turbines hit icons for info .

Google Jetspecs for flametube program

[spartablades]

Feb 29, 2020 16:46:17 GMT -5 racket said:

jetandturbineowners.proboards.com/thread/680/diy-turbines hit icons for info .

Google Jetspecs for flametube program

too someone problem i found is here .. : to the same (1st pic) the diameter is 22,2 cm ...and according to my calculation in the 2nd photo for the big turbocharger: 7.4cm (my inducer turbo) 7.4 x 2 * (* 2 beacuse the text say x2 to big turbos) effect 14.8 .... while in program in the 1st picture says 22.2

[racket]

Use the 14.8 cm figure , Jetspecs is a crude program designed to cover a multitude of turbo configurations , your turbo is just on the borderline between small and big hence the inconsistency .

A 74mm inducer turbo will be able to produce a healthy P2 so not so much need for a larger crossection , 3 times inducer AREA is the minimum that you require , 74 mm = 4300 sq mms X 3 =12902 sq mms = 128 mm dia flametube , the 148 mm suggested will provide a bit of extra space and less combustion problems ..

Cheers
John

[spartablades]

Mar 1, 2020 16:27:03 GMT -5 racket said:

Use the 14.8 cm figure , Jetspecs is a crude program designed to cover a multitude of turbo configurations , your turbo is just on the borderline between small and big hence the inconsistency .

A 74mm inducer turbo will be able to produce a healthy P2 so not so much need for a larger crossection , 3 times inducer AREA is the minimum that you require , 74 mm = 4300 sq mms X 3 =12902 sq mms = 128 mm dia flametube , the 148 mm suggested will provide a bit of extra space and less combustion problems ..

Cheers
John

so length 44.4 & diameter 14.8 ... lock up and start work
 the combustion chamber now how to mesured? I thought about taking this photo and printing it to my size (44.4. 14.8)


and my last question  for now is.. to calculate  the number of hols to the flame tube...is correct that to the next photo?



example  primary  0,6 mm dril 45 hols... secondary  10mm drill 10 hols and tertiary  with 16mm 7 hols?

[racket]

What fuel will you be using , and method of injection ??

This will influence hole placement/size/number etc .

Cheers
John

[spartablades]

My plans in my mind say to use gas propane.... ..but for my project is difficult because i have problem with the fuel tank ..it s too big for o frame bicycle _( frame is for yamaha fzr 400)
if you suggest me some fuel better for that and you cun help me to fix it ( somebody say fuel about cerosine and petrol???)
or else i stay to my project with propane for the time ..i m here because i want your s opinion about all that ant thank you for your timee all you spend for me

[racket]

Hi

Your turbo is too large for propane use , the large fuel burn rate will soon see your propane vapour pressure in the cylinder drop to a point where little gas will flow , you need to use kero or diesel or diesel/petrol mix.

In which case you'll need to use a high pressure spray nozzle for the fuel and a flametube with less Primary holes but of larger diameter , maybe 10 larger holes instead of the large number of small holes currently , position the 10 large holes at the theoretical impact point of the fuel spray which will vary depending on the fuel spray angle , it needs to be a wide angle of at least 60 degrees preferably >90 degrees

Cheers
John

[spartablades]

first of all thank you ...
first my basic question before thE flame tube is : in my mind i have to start this project to burn propane ... but all that project will build up to a frame of motor bike ( fzr 400 yamaha frame) anywere i can t have all that big bottle oF propane... so i thinking to start project bulid with realy fuels gas example ( kerosine or petrol or somthing else ) firts of all is here someone to explane to me the

percentage of the mixture? for example of gasoline or petrol or the ratio of fuel? that is, proportion first and something else ..if i use that type of fuel example kerosine ...i must build different the dimensions ( diameter and lenght) of the flame tube? THANK YOU A LOOTTT

[racket]

Hi

The flametube dimensions are OK for either propane or kero, diesel or diesel/petrol mix , its only the Primary holes that need to be different due to the different injection method between propane and "liquid" fuels.

Theres plenty of info here jetandturbineowners.proboards.com/thread/680/diy-turbines just click on the various icons in each section for the info ., we only have a "mixture" in the Primary Zone which will be "normal" mixture strengths.

Cheers
John

[spartablades]

Mar 3, 2020 15:53:49 GMT -5 racket said:

Hi

The flametube dimensions are OK for either propane or kero, diesel or diesel/petrol mix , its only the Primary holes that need to be different due to the different injection method between propane and "liquid" fuels.

Theres plenty of info here jetandturbineowners.proboards.com/thread/680/diy-turbines just click on the various icons in each section for the info ., we only have a "mixture" in the Primary Zone which will be "normal" mixture strengths.

Cheers
John

 first ... the  kero  is two types ..right? that fuel use fly planes and fuel kero for 

heating kerosene home... iif i cant found a fly kero can i use 

heating kerosene?

after... when we say kero...only kero or mix with petrol or something else ?
and last... the holes to flame tube if i use kero 

they have to become smaller or bigger to the primary holes?...

for the injection of the fuel i m thinking use a beck fuel car injection  

[racket]

Home heating kero is only a less refined aviation kero , the aviation kero has all the water and sulphur removed, home kero works just fine in our engines, no need for a petrol mix , we only need some petrol when using diesel if we find the diesel is making the engine smoke.

If using kero you need larger Primary holes with the same total area as a lot of smaller holes if using propane

[spartablades]

Mar 3, 2020 19:58:22 GMT -5 racket said:

Home heating kero is only a less refined aviation kero , the aviation kero has all the water and sulphur removed, home kero works just fine in our engines, no need for a petrol mix , we only need some petrol when using diesel if we find the diesel is making the engine smoke.

If using kero you need larger Primary holes with the same total area as a lot of smaller holes if using propane

you didn t know so much you hheeellpppp meeeeeee... then i will use simple kero home heating  
and i change only to the primary  holes the drill diameter.. example ... if i have to primery 40  holes with 0,6 mm i will drill less but with bigger diameter holes example 0,9mm 

example  to the pic  above :


instead 0.6 mm  i put o,9 mm 

that is, as a result of less holes but more wide holes ( PRYMERY HOLES FLAME TYBE)

[racket]

Try going a bit larger with the Primary holes to further reduce the number , maybe go up to 10 mm dia

[spartablades]

Mar 4, 2020 15:20:07 GMT -5 racket said:

Try going a bit larger with the Primary holes to further reduce the number , maybe go up to 10 mm dia

great ...i will dril 10mm primary & secondary ... and 1,6 tertiary
now the gap between flame tube and housing  is 2cm ... then then is flame tube is 14,8cm = housing  is 14,8 +2 +2 (cm) then the diameter of housing is 18,8 cm ..right?