well, look at that...
i have had my thinking cap on.
i maded a drawing
hopefully its displayed correctly.
its not to any particular scale, its just a diagram, the measurements are a byproduct. surprisingly good though
maybe just try it out as is!
so, im contemplating that the end of that first "header pipe" is best shaped as a parabola.
the end of the internal tube is placed at this focal point.
this way, the positive wave travelling down the header from port, is focussed to a point, and the subsequent positive reflected wave is confined to the internal tube. the negative wave reversing and sucking exhaust out from port.
positive wave then travels down this internal tube, encountering some divergence to keep the negative wave building.
now, experiments will prove me right or wrong... a parabolic end opposing the internal tube, which reflects wave back, but up the external tube. these encounter the end of the chamber, which i feel is best flat but possibly tapered. not parabolic. this larger chamber acting much like the belly.
the wave reflects, returns to the lower parobola, reflects and is once again confined to internal tube where it intensifies.
emerges from end of tube, reflected, travels back into header raising pressure.
THIS IS JUST THE WAY I PERCIEVE IT> I MAY BE COMPLETELY UTTERLY WRONG.
so.
refer back to diagram.
critical dimensions i hopefully listed
any others, please mention.
so.
i propose, firstly, a simple ripple tank test. i make a simple model from some styrene sheet in a plastic tub. experiment with angles and shapes for perfect wave transfers, if any
two dimensions gives a good idea of wave propagation inside a tube, albeit at reduced speed.
it does give a visual representation, and therefore an understanding of the internal action of this design.
one concern is the main header from engine enters at right angle. the ripple tank will prove/disprove this.
maybe it will need a real tight but smooth bend directy to the internal tube, obviating the external tube.
theres the possibility of an elliptical end being used, with the property of being able to focus the wave "over there"...
ie, the external "header" tube is ovalised, with the internal tube and internal header side by side.
an ellipse has two focii, so the wave can be focussed from one tube to the other. (im not too sure about this bit... theory only... seems to work in concert halls?)
so, figuring out the maths.....
yee gods, i havent even started thinking that far! prove the concept with a simple model before proceding!
i know some of the basics may apply. possible divergences in tubes, etc.
reflection points hence curves of parabolas, which govern certain diameters/lengths. i really do feel the focal points play a major role in effectiveness of this design, if any.
lengths. speed of sound, temperature and density/pressure.
stinger/bleed placement...
i do feel, that, if this pipe is doing what i picture its doing, it should actually do something!