APPARATUS FOR FLUID FLOW PRECISION PRESSURE-REDUCTION, AND ATTENUATION AND DIFFUSION OF JET-PRODUCED SOUND WITHOUT SUBSTANTIAL SOUND-REGENERATION IN JET-PORT ARRAYS, INCLUDING VALVES AND THE LIKE

摘要

This disclosure deals with the precision pressure reduction of a fluid stream while attenuating and diffusing jet-produced sound therein from a jet-port array as in valves and the like, but without substantial sound-regeneration during the same, through the use of enveloping apertured screens and the like positioned close to the vortex mixing region and adapted to produce a controlled gradual frictional reduction in pressure gradient while controlling the velocity of the streams exiting from the jet-port array.