Flow Measurement of Diesel Fuel
Flow Measurement of Diesel Fuel
(OP)
Hi all,
Please let me briefly explain the scenario of this experiment
Types of fluids: Air and Diesel
Types of measurement: flow rate and pressure
Air pressure : regulated in 10 to 15 psi
Both of air and diesel fuel are working in 1/4" ID pipe/hose.
A spray nozzle is placed into a manifold so that the fuel can be drawn by the air. This will create atomization and mixture with air and diesel. Air is the driving energy to draw the diesel fuel into the system. In other word, there is only vacuum pressure in the fuel line.
Can anyone advise on best way to accurately measure the volume flow rate of air and fuel from the situation above? All the information and suggestion are much appreciated.
Regards
Please let me briefly explain the scenario of this experiment
Types of fluids: Air and Diesel
Types of measurement: flow rate and pressure
Air pressure : regulated in 10 to 15 psi
Both of air and diesel fuel are working in 1/4" ID pipe/hose.
A spray nozzle is placed into a manifold so that the fuel can be drawn by the air. This will create atomization and mixture with air and diesel. Air is the driving energy to draw the diesel fuel into the system. In other word, there is only vacuum pressure in the fuel line.
Can anyone advise on best way to accurately measure the volume flow rate of air and fuel from the situation above? All the information and suggestion are much appreciated.
Regards





RE: Flow Measurement of Diesel Fuel
RE: Flow Measurement of Diesel Fuel
RE: Flow Measurement of Diesel Fuel
Read up on ejectors.
Separately, the most accurate inexpensive way to measure the fuel flow is as racookpe1978 suggested; measure the tank level, then measure it again after a measured time has elapsed, and do the math.
Separately from any of that, what are you going to do with Diesel vapor in air?
You can't run an SI engine on it, at least not for long.
Mike Halloran
Pembroke Pines, FL, USA
RE: Flow Measurement of Diesel Fuel
RE: Flow Measurement of Diesel Fuel
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Flow Measurement of Diesel Fuel
The calculation of flow rate can be done. However, there are many losses in the fuel delivery system.
So far, the way we measure the flow rate of diesel fuel is to use stopwatch and graduated cylinder with valve. This step-up gives pretty good indication of the flow rate but not precise enough. See Figure below
RE: Flow Measurement of Diesel Fuel
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Flow Measurement of Diesel Fuel
RE: Flow Measurement of Diesel Fuel
Current setup:
RE: Flow Measurement of Diesel Fuel
RE: Flow Measurement of Diesel Fuel
I hate Windowz 8!!!!
RE: Flow Measurement of Diesel Fuel
I was thinking to replace the graduated cylinder with a glass tube and a Totalizer. In my opinion, it's more accurate than a stop watch and an eye-measurement. I am not sure what you guys think of that.
RE: Flow Measurement of Diesel Fuel
I hate Windowz 8!!!!
RE: Flow Measurement of Diesel Fuel
Sorry if i misunderstand your comment, you are saying it wouldn't matter if I place the fuel tank 4 feet below the center of the nozzle. Does that mean there can be zero pressure with differential pressure and velocity in the fuel line?
I am trying analyze the configuration of a Two-Fluid nozzle. It basically has a nozzle head, a fuel distributor, and a stem. In between of the nozzle head and the fuel distributor, there is a small space for air and fuel mixing together before the mixture sprays out of the atmosphere. Obviously, there will be a pressure drop when the mixture is released out of the nozzle head similar to orifice application. What about the small space that mixes the air and the fuel? Will there be any pressure drop compared with 10 psi air inlet?
RE: Flow Measurement of Diesel Fuel
I hate Windowz 8!!!!
RE: Flow Measurement of Diesel Fuel
Thanks for the comment again. I think that's what I will do with this experiment. Just a quick question, what's the difference between using graduated cylinder and experimental flow measurements by measuring volume lost in a containers over time?
RE: Flow Measurement of Diesel Fuel
RE: Flow Measurement of Diesel Fuel
RE: Flow Measurement of Diesel Fuel
http://en.wikipedia.org/wiki/Burette
The level change will will cause a flow rate change. The be accurate you need to move the burette up as the level falls, or use the burette to feed the equivalent of a carburetor float bowl.
What you are designing sounds exactly like my kerosene Ready Heater, which looks and sounds like a small jet engine.
RE: Flow Measurement of Diesel Fuel
Right now we are using burette to measure the flow rate of the fuel, but once again, since it's controlled by an operator who controls the valve and stopwatch, plus with the error of measurement (eye-measuring). That's why we are looking for alternative method to measure the flow, more digital or data-recorder type.