Liquid fuel nozzles

[pitciblackscotland]

Hi what size nozzles are you after? I have a box of different sizes and i can machine up the boss to screw them into.

Cheers,
Mark.

[slittlewing]

Whats wrong with using a normal Monarch Oil Burner Nozzle, 044 Pump and PWM Controller?

[richardm]

Nothing wrong with that as long as your pwm controller is well matched to your pump motor. I ve tried quite a few PWM controllers and was disappointed because I couldn't get the pump to run as slow as I wanted.
I had to crank the the pot halfway up to get te pump to start and then it would run too fast.
Did you get better results ?
I built myself a servo controlled bypass regulator instead. Pump is constant speed range from 0 to 300 psi .

[jetric]

Errr, I had sent you a link to some for sale on ebay?

Richard S.

Oct 3, 2024 10:32:20 GMT -5 noshell said:

The bastards wont respond to me
id have to make one. orrrr
bete.com/nozzle-configurator/?ncMdlS=PJ&ncFilterDensity=1&ncFilterSprayPatterns=Mist

[noshell]

Thankyou Richard. I actually diddnt realise they were the same as the variflo nozzle. I knew literally nothing about burner nozzles at the start of this thread. I'm in the UK, but it's a good find. I may well have to order them from the States.

I need to work out what size nozzle.
Id probably want a nozzle to flow enough to make 20hp. Annoyingly I can't find much info on my turbo it's a 2.7 sprinter turbo. I chose it because of the nicely matched Compressor/turbine. The compressor inducer isn't big, only 40mm

[noshell]

Oct 4, 2024 7:17:42 GMT -5 slittlewing said:

Whats wrong with using a normal Monarch Oil Burner Nozzle, 044 Pump and PWM Controller?

I'm not familiar with it. I'll have a search.

[slittlewing]

The sytec 044 copies are cheap and can make 10 bar, they can operate at low pressure for idle. The nice thing is not having to mess about with returns or working the pump hard at full pressure needlessly unless you are at full power.

Cheers

Scott

[noshell]

What do you use for a PWM Controller? An rc car esc?

[noshell]

I honestly don't even know where to start with working out my nozzle size. I thought they would all be specified to kW of output.
I won't be using high pressure pump. Probably something the region of 100psi

Given my uncertainty in nozzle selection. I think I will buy some cheap nozzles and experiment. I may try and do my own spillback nozzle as someone earlier suggested. On the face of it, It doesn't seem difficult to do.
I've noticed the absence of small spillback nozzles. Most are for tens or hundreds of gallons per hour. Perhaps they're not as nesscary at small scale.

I'd appreciate some guidance on working out a nozzle size.
Thanks in advance

[racket]

Have you read jetandturbineowners.proboards.com/thread/680/diy-turbines go down to the relevant section and click on the icon for the info .

We generally work on a 60:1 overall air/fuel ratio , so your air flow per second is the same as fuel flow per minute , or minute/hour .

Where is your engine specs ??

[noshell]

I have not. Thanks for linking it.

The turbo I've used is as follows
GT2256V Mercedes Sprinter 2.7L CDI.
Compressor
Inducer: 40.3mm
Exducer: 56mm (51.8 Trim)
.53 A/R
Turbine
Inducer: 50mm (est.)
Exducer: 42.7mm
.64 A/R

I've never managed to find a Compressor map for it.

[racket]

OK , mass flow will probably be ~22-25 lbs/min , so ~22-25 Lbs/hour of fuel required , so ~3.3 -3.7 US GPH of kero , if you run up to 30 psi of P2 , then if your nozzle is rated at 100 psi , you'll only have 70 psi of discharge or ~84% of rated .

Divide our 3.3 GPH by 0.84 = 3.92 GPH , 3.7 by 0.84 = 4.4 GPH , go for a 4 US GPH hollow cone spray nozzle if max fuel pressure is 100 psi , if the pump is capable of say 130 psi with 100 psi of discharge then back off to a 3.5 US GPH nozzle

Cheers
John

[noshell]

You're too good. Thankyou very much.

I'm going to have a read through all that info next week at work.
Progress on this engine is absolutely glacial because of the little one. Don't expect any videos too soon haha