I'd like to figure out how much propane flows through the tip in a burner I built, in order to determine how much heat it delivers. The tip I'm using now is 0.8" long with an inside diameter of .030" and it has propane coming in at 3.5 psi from the regulator. The propane jet shoots out into a tube and pulls in air to mix with it, the way a weedburner or plumber's torch does. Then the hot exhaust goes into a very efficient heat exchanger that transfers the heat to a diesel engine's coolant. I'm trying out different pressures and aperture sizes. I don't know enough about hydrodynamics to go about calculating flow based on pressure and aperture. I don't know if the flow in the tip is laminar or turbulent, or whether it can be modeled as incompressible for purposes of applying Bernoulli equations. Perhaps there's even a table somewhere listing the flow for different pressures and apertures sizes, in which case I wouldn't have to do any calculations at all? Any help much appreciated.

- posted
14 years ago