Effects of solid particles with different concentrations on cavitation flow special development in the nozzle

This paper studied effects of solid particles with different concentrations on cavitation flow special evolution in the nozzle. Solid particle concentration varied from 1% to 6% and the mean diameter increased from 0.0015 mm to 0.070 mm. Schnerr-Sauer cavitation model for pure water cavitation flow (PWCF) was modified to perform the numerical simulation of solid particle-water cavitation flow (SPWCF). Results indicated that SPWCF vapor content was greater than that in PWCF. Solid particles with various concentrations promoted cavitation flow evolution. With the increase in concentration, the promotion scope of the mean diameter became smaller gradually. SPWCF flow parameters and force acting on solid particles were discussed to reveal the mechanisms. The maximum and absolute minimum slip velocities were greater than corresponding ones of PWCF. The maximum and minimum turbulent kinetic energies were higher than those of PWCF. SPWCF mixture kinetic energy was higher than that of PWCF. They were primary factors to decrease the pressure to promote cavitation flow evolution. Magnitude of the calculated Saffman lift force was 10(-2); the effects on cavitation flow evolution were relatively weak; it was the secondary factor. Interactions of these factors promoted the special evolution of SPWCF in the nozzle.