Accession Number : ADA095028


Title :   A Review of Models of the Fluidic Generator.


Descriptive Note : Progress rept. Sep 78-Sep 79,


Corporate Author : HARRY DIAMOND LABS ADELPHI MD


Personal Author(s) : Deadwyler,Richard


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a095028.pdf


Report Date : Nov 1980


Pagination or Media Count : 43


Abstract : The fluidic generator is a pneumatic-to-electrical transducer that provides electrical power for the fuze circuits in missiles and rockets. It consists of four subsystems: (1) the jet-forcing mechanism (the annular nozzle and the knife edge of the resonator), (2) the resonant cavity, (3) the mechanical diaphragm assembly (the diaphragm, connecting rod, and reed), and (4) the electrical circuit. The first three subsystems constitute a feedback control system, in which ram-air input to the generator is brought into oscillation with a resonant or reflecting structure controlling the feedback. Pressure feedback signals are generated by sonic reflections from (1) the knife edge, (2) the cavity (assuming that the diaphragm is not moving), and (3) the moving diaphragm. The feedback signals are summed or coupled at the nozzle exit region of the jet. This physical model shows that the generator can be forced to jump to nondesign frequencies of oscillation because any change in the potential of the input jet will change the signal propagation or convection speed in the forward path and the acoustic speed in the feedback path. Thus, the physical model provides a qualitative answer to the question of jumps in the generator operating frequency.


Descriptors :   *FUZES(ORDNANCE) , *TRANSDUCERS , *GENERATORS , *FLUIDICS , VELOCITY , PROPAGATION , MODELS , PHYSICAL PROPERTIES , EDGES , STRUCTURES , PATHS , MOTION , CONVECTION , REFLECTION , FEEDBACK , SIGNALS , RESONANCE , PRESSURE , CIRCUITS , ASSEMBLY , KNIVES , OSCILLATION , ROCKETS , CAVITY RESONATORS , DIAPHRAGMS(MECHANICS)


Subject Categories : Fluidics and Fluerics
      Electric Power Production and Distribution
      Ammunition and Explosives


Distribution Statement : APPROVED FOR PUBLIC RELEASE