Results from former studies of double stage processes indicate that a droplets are broken up in most likely in the first orifice (Freudig,2004). This hypothesis was drawn from the oretical
investigations on the probability of cavitation incidences. With the knowledge of cavitation patterns presented in the previous chapter,we now take a look at the resulting droplet sizes achieved with ‘Setup A’ after the first and second orifice. Fig. 4 shows the resulting Sauter mean diameters(SMD) depicted in dependence of an increasing Thoma number Th. Applied by the second orifice, the back-pressure increases with increasing Th and the pressure loss at
the first orifice thus decreases.