Patent ID: 6164059
Filing Date: 2000-12-26
Classification: F02K,F05D,Y02T

Abstract:
An ejector for fluidly pumping another fluid having a main body having a longitudinal axis and defining a passageway for flowing primary gas defining a primary gaseous stream, said main body including a first fixed discharge slot for flowing a secondary gases defining a secondary stream, said main body having a first wall disposed upstream of said first fixed discharge slot and a second wall disposed downstream of said first fixed discharge slot and radially spaced outward from said first wall defining a boundary for the primary gaseous stream of said ejector, the improvement wherein said second wall defines a divergent angle relative to said first wall, wherein the primary gaseous stream expands adjacent said first fixed discharge slot for pumping the secondary flow so as not to pinch the secondary gaseous stream egressing from said discharge slot, second fixed discharge slot in fluid communication with said passageway and being disposed downstream of said first fixed discharge slot and adjacent to said second wall, a third wall also defining a boundary for said primary gaseous stream and being radially spaced outward from said second wall and said third wall defining a divergent angle relative to said first wall, wherein the primary gaseous stream expands adacent to said second fixed discharge slot so that the primary gaseous stream does not pinch the flow of secondary gaseous stream egressing from said second fixed discharge slot and being pumped thereby, each of said second and third walls also divering with respect to the longitudinal axis, and wherein said secondary gaseous stream is cooling air and said primay gaseous steam is the exhaust gases from a gas turbine engine.