Fisonic Devices (FDs) are heat exchangers, pumps, and mixers with patented optimized internal geometry. The theory of Fisonic devices was developed by Professor Fisenko by addressing safety problems of the Russian nuclear submarines during the disruption of the air tightness of reactor cavity (Ref 1-2).
The diagram of an FD is presented in Figure 1. At this design, the injected water enters the mixing chamber with high velocity in parallel with the velocity of the working stream. The injected water is supplied through a narrow circumferential channel surrounding the working nozzle. The mixing chamber has a conical shape. The FDs operate with high expansion and small compression ratios. The discharge pressure in the FDs is typically higher than the pressure of the working and injected streams.