Proposed Design - Amphora with Single-Stage Tesla Valve Ring

[Andrew Parker]

I looked up the reference again.

Title: Pulse combustion energy system
Inventor: Lockwood, Jr.; Hanford N.
US Patent #4,992,043
Date: February 12, 1991

This is the seventh in a series of patents that basically rehash the same idea with a few improvements:

4,992,043 Pulse combustion energy system

4,992,039 Pulse combustion energy system

4,941,820 Pulse combustion energy system

4,838,784 Pulse combustion energy system

4,819,873 Method and apparatus for combusting fuel in a pulse combustor

4,767,313 Pulse combustion energy system

4,708,159 Pulse combustion energy system


These are the paragraphs that describe the "air diode":

"An outer surface 144 of inner portion 140, an outer surface 148 of backplate 128, and an inner surface 152 of inner sleeve 120 together define an annular air chamber 156 in fluid communication with an annular "air diode" 160 formed by an inner surface 164 of outer portion 136 and an outer surface 168 of inner portion 40. The shape of annular air diode 160 is such that it will impede the flow of gas from combustion chamber 81 toward air chamber 156 to a greater extent than the flow of gas from air chamber 156 toward combustion chamber 81. This is accomplished by scalloping surface 164 and by forming surface 168 as a series of waves as shown in FIG. 3A."

"The pulse combustion cycle starts when an air pulse from the rotary valve 78 mixes with gas from the two nozzles 186 and the mixture explodes due to the ignition energy from igniters 187. When the fuel and air detonate, the pressure in the combustion chamber 81 increases, causing a back flow of the air in the chamber towards the closed rotary valve 78. As the back flow of air flows through air diode 160, surface 168 in air diode 160 causes the air flowing there along to reverse direction and flow transversely toward surface 164. The combination of the reverse momentum of this flow with the scalloped shape of surface 164 creates an artificial vena contracta which has the effect of constricting the flow through air diode 160 and reducing the back pressure on the closed rotary valve 78."

I hope this helps.


Andrew Parker

[George]

Hello!

Bruce says:

The returning gasflow from the exhaust cone doesn't provide much in the way of compression -- the LH is still a very low-compression engine, like all conventional pulsejets.

What did Bruce think about a REYNST design with an exhaust pipe like it's done for a two-times piston engine ( a megaphone with a conter-cone) or with a diabolo to bring back pressure ?