Patent ID: 7357565
Filing Date: 2008-04-15
Classification: B01F

Abstract:
1. A fluid injector having improved fluid mixing capabilities, said injector comprising: a body for directing the flow of a carrier fluid, said body having an internal wall forming a flow passage therethrough, said flow passage having a central axis, an inlet, an outlet, and a port for receiving a secondary fluid that is mixed with said carrier fluid, a ramp-like restriction located downstream of said inlet and upstream of said port and extending from said body internal wall so as to decrease the effective cross-sectional area of said flow passage in the direction of the flow of said carrier fluid, said restriction having a downstream end at which is located a rear surface that extends abruptly down to said flow passage internal wall, a ramp-like expansion located downstream of said port and upstream of said outlet and extending from said body internal wall so as to increase the effective cross-sectional area of said flow passage in the direction of the flow of said carrier fluid, said expansion having an upstream end at which is located a front surface that extends abruptly upward from said flow passage internal wall, wherein said restriction and expansion being situated on said internal wall so as to form between said restriction rear surface and expansion front surface a cavity, and wherein said port located in said cavity.