Theoretical and experimental investigation of fluidic oscillator

Abstract EN

A symmetric feedback fluidic oscillator design is proposed.

Theoretical and experimental studies have been conducted to evaluate the relation between the fluidic feedback oscillator frequency and temperature of the air which is the working substance.

Two methods of calculations were used, lumped and distributed parameter system.

Then the results obtained experimentally.

It was found that the results of the lumped parameter system are closer to experimental results than the distributed parameter system and also give the nonlinearity by (0.915%) between the lumped and experimental results show linear relationship between air temperature and oscillator frequency with a coefficient of determination (0.9977) And also found that the oscillator readings have a margin of error very small amount (0.0011 Hz / Co) as well as a percentage (hysteresis) of about (1.663%) when measuring the temperature and to overcome the hysteresis we suggest the use of fins to get rid of (residual heat), the rig sensitivity was (3.66*10-3 s/Co) finally, the rig resolution was (0.002 s).