Nozzle cylindrical bodies

Figure 13.3.6 is a photograph of a skid-mounted venturi-scrubber/cyclone separator system. Spray water injected (see far left-hand side in the photograph) is captured by the rather short cylindrical-bodied cyclone separator located immediately downstream of the scrubber. We note that the cyclone has a scroll-type rectangular inlet and that the downstream blower makes this a pull-through type system. Scrubber water collected by the cyclone reports to a receiving tank located below the cyclone. Prom here, it is pumped back up through the scrubber s spray nozzles. 

The experimental setup sketched in Figure 5.2.3 comprises a burner with ad = 22 mm nozzle exit diameter and a driver unit (loudspeaker) fixed at its base. The burner body is a cylindrical tube of 65 mm inner diameter containing a set of grids and a honeycomb followed by a convergent nozzle with an area contraction ratio of cr= 9 1. 

It consists of a ceramic cubic body, in which a cylindrical cavity is drilled. A channel is drilled perpendicular to the axis of the cavity and hosts two rods (electrodes) of the material to be vaporized, facing each other and separated by a gap of about 1 mm. A solenoid pulsed valve injects helium at the pressure of 20 bar through an insulating ceramic nozzle on the back of the cavity. The gap between the electrodes is off-axis, in such a way that the gas flushes on the cathode surface. A removable nozzle with cylindrical shape closes the front of the source. 

Decompression nozzles with cylindrical tips with a diameter from 12 mm and H7/g6 fit are commonly used. Some sources [26] recommend the use of diameters no smaller than 16 mm and lengths of at least 35 mm, with a 0.2 mm clearance, as the film that is formed protects the tip from abrasion and there is self-cleansing by the slight drooling. During injection there is sealing of the nozzle by the pressure of the end of the plunger or by the taper of the body as an alternative. 

---