ArtMetal

Rich, you`ve explained quite well the physics behind a venturi gas burner.After researching some,I realize that in my case,there`s no need for such a sofisticated device as an accelerator and other fancy tech features,considering the low gas price here.Neverthess, I cannot help considering basic improvements over a basic design, as possible. For instance, the spring idea I like. Obviously reducing the speed some before the air-gas mix reaches the combustion end, increases burner performance. Do you think a expansion chamber half way the burn tube may slow down the flow too much? Probably, would depend on how much expansion, or how much texture, for the speed reduction principle would apply anyway! It just crossed my mind, most venturi designs use a T-reduction. What about using a Y-reduction? The initial flow speed at the venturi spot should be higher for Y than for a T due to the angle, so if I start off with a little higher speed then slowing down the flow for mixing won`t be a concern...Just thought too,that the little air speed gained may canceled out with the little reduction of the gas speed at that little turn of the Y (just things to wonder huh!).Again, this may be just another detail NOT TO WORRY ABOUT ? I do have a whole bunch of refractory bricks, and wonder if it would not be good to have a little ineficiency due to some heat absorption by the bricks, but the convinience of getting a piece hot faster with an increase in gas flow from idling heat ???Hope some of my assumptions aren`t way off, but the could. Nelson.