First engine complete! 62mm turbo, ~20lbf

[racket]

Hi Brandon

There are whole Papers written on the subject of swirl vanes and the designs , I simply used one from an oil burning boiler setup, along with the fuel nozzle setup as per an aero engine with cooling and pattern control, it worked :-)

Cheers
John

[noshell]

interesting to know John. I have been thinking about using one of these in my next flame tube.
www.aliexpress.com/item/1005007705089962.html?spm=a2g0o.productlist.main.1.11f75da9lVCkwR&algo_pvid=7f1f99cb-ea83-447c-81b3-935fc3d8d88b&algo_exp_id=7f1f99cb-ea83-447c-81b3-935fc3d8d88b-0&pdp_npi=4%40dis%21GBP%2110.19%2110.19%21%21%2112.93%2112.93%21%40211b813b17290736779181099e1453%2112000041921727361%21sea%21UK%210%21ABX&curPageLogUid=77U4lEOUGnw6&utparam-url=scene%3Asearch%7Cquery_from%3A

To be honest I don't know much about these diesel heaters and I've struggled to find info on how they work. My buddy has one and I know it does not require a high pressure air feed.

[richardm]

I dont think that a 5Kw heater burner can handle the burn required to run a turbo charger based engine.

[cebaero]

Oct 15, 2024 15:55:39 GMT -5 racket said:

Hi Cebaero

The delivery tube must NEVER be attached to the Primary Zone area, it invariably causes problems as the incoming air blows the flame to the opposite side.

I've been trying to counter this design perception for decades but without success , guys look on You Tube and see dozens of engines with it attached at the Primary end and think thats how it should be, unfortunately it ain't :-(

The engine will probably work, but its performance and life span will be less than ideal .

Cheers
John

Thank you very much. I'm glad I saw this when I did because I am very close to attaching the compressor to the combustor lol. So, in an ideal air would it attach to the tertiary or secondary holes, or does it not matter as long as it is not on the primary? Also, should I attach it a little off center as to spin the air around a bit or should I just attach it straight on? I am just confused as to if his build created too much spin or if it shouldnt create any spin at all.

Thanks!

[racket]

This is the best example, the Allison/RR 250 heli engine ...., they have 2 delivery tubes to balance out the flow,

www.google.com/search?sca_esv=992c006e90961474&rlz=1C1ONGR_enAU1095AU1095&q=Allison+250+turbine+engine+combustor&udm=2&fbs=AEQNm0Bqzy2A7JdsZg3J6bXbexmPYRAnmocz_wSkO9o2d70T0heh0g9PP-lN5PtKwO3uHaElUXXU1c91d54ABW-Z31cLhLPdwywmWCwUE-x89fYV873QTjus1pdZQ9I9wgZFMeuI_01wwR60_PWHRGFURAT8waCFEyB-ALWnw8hUz5RSX1PhWPYZhArMDHRoBme8Y3nyF2MkVP7vEuweIHEcVkxGaWI-TA&sa=X&ved=2ahUKEwiMzM7s3pOJAxW2sFYBHUxNHtkQtKgLegQIFhAB&biw=1356&bih=904&dpr=1#vhid=D_E3y5wG0ON13M&vssid=mosaic

The tubes feed into large "funnels" that spread the air , there is a baffle inside that also helps with distribution.

With our single delivery tubes its imperative not to force air at any particular spot , or to produce swirl /spin around the flametube , this means a funnel and delivery to a "quiet corner" of the combustor which is near the outlet end of the combustor as in the pic Link I provided the other day ibb.co/kKVD4rk , ideally into the plenum area surrounding the transition funnel on the outlet end of the flametube where there is space for the air to flow and spread out and reduce velocity before making its way to the flametube wall holes .