Moog Inc.
Sonic flow control valve

Abstract:

A flow control valve comprising a valve body having a valve throat, a narrowing nozzle passage upstream of the valve throat, a valve member having an outer narrowing surface and movable relative to the valve body to meter flow through the valve throat, a widening diffusor passage, a widening passage downstream of an inlet port and upstream of the narrowing nozzle passage, and the widening portion widening from a first section having a first cross-sectional area that is equal to or greater than the cross-sectional area of the inlet port to a second section downstream a distance from the first section and having a second cross-sectional area that is greater than the cross-sectional area of the first section of the widening portion.