Patent ID: 7520451

Claim:
A spiked axisymmetric nozzle comprising: (a) a cylindrical member comprising a first wall having an inner face and an outer face, and a first end and a second end, thereby defining a hollow interior, wherein the first wall has a cowl lip configuration in the second end; and (b) a fluid acceleration region of the second end of the cylindrical member comprising: i. a nozzle plug comprising a means for securing the nozzle plug to the cylindrical member, a first cylindrical portion connected with the means for securing the nozzle plug to the cylindrical member, the first cylindrical portion having an upstream end and a downstream end, and a ramped portion having a proximal end and a distal end, where the proximal end is connected with the downstream end of the first cylindrical portion, and ii. a fluid compression orifice defined by the ramped portion of the nozzle plug and the cowl lip wherein the means for securing the nozzle plug to the cylindrical member comprises a second cylindrical portion having a wall with an outer surface, a floor, and at least one aperture therein, wherein the upstream end of the first cylindrical portion is connected to the floor of the second cylindrical portion and the outer surface of the second cylindrical portion is contiguous with the inner face of the first wall.