초록 ▼

Wall deflections of a multi-lobe type noise suppressing nozzle are minimized without the use of external struts and by the use of only a single internal strut per lobe. The lobes have either a substantially elliptical or substantially circular shape in cross section and they merge into valley region

Wall deflections of a multi-lobe type noise suppressing nozzle are minimized without the use of external struts and by the use of only a single internal strut per lobe. The lobes have either a substantially elliptical or substantially circular shape in cross section and they merge into valley regions of substantially circular curvature in cross section. The internal struts and thickened sidewall portions of the lobes define a structural ring providing hoop and bending strength at the center of the nozzle. The thickened sidewall sections of the lobes are welded to shaped sheet metal crown and forward valley sections to form the nozzle. Wall portions of the nozzle are thinned by the chemical milling for the purpose of weight reduction.

대표청구항 ▼

A noise suppressing nozzle comprising a plurality of lobes, each lobe defining an internal passageway for hot gases flowing through the nozzle, and each pair of adjacent lobes defining between them an external passageway for ambient air, and the improvement comprising: each lobe including a thickene

A noise suppressing nozzle comprising a plurality of lobes, each lobe defining an internal passageway for hot gases flowing through the nozzle, and each pair of adjacent lobes defining between them an external passageway for ambient air, and the improvement comprising: each lobe including a thickened sidewall section on each of its sides, with each said thickened side wall section merging into and becoming an integral part of the adjacent thickened sidewall section of the adjoining lobe in a valley region between the lobes; each lobe being internally reinforced by a single streamlined transverse strut, connected at its ends to the thickened sidewall sections of its lobe; with the sidewalls of each lobe curving smoothly in the radial direction and from the vicinity of strut attachment to the thickened sidewall sections first diverging apart as they extend radially outwardly, and then converging together and eventually merging; and wherein the thickened sidewall sections of the lobes and the transverse struts define a ring which together with the radially curved sidewall configuration of the lobes act to adequately maintain nozzle shape and brace against exit area change without the need of additional reinforcing structure.