Abstract: The invention comprises a slot (20) operable to direct a substance through the slot (20), the slot (20) having a maximum inner width (23) and a maximum inner length (22), the ratio of the maximum inner length (22) to the maximum inner width (23) being greater than two. The invention further comprises a base (30) coupled to the slot (20), the base (30) having a width (28) greater than the maximum inner width (23) and a length (29) greater than the maximum inner length (22) to redirect the substance through the slot (20) at an angle.According to another embodiment of the invention, a system for transferring a mass over an impingement surface (25) comprises a plurality of slot jet reattachment nozzles (10) operable to direct the substance over the impingement surface (25), the plurality of slot jet reattachment nozzles (10) located proximate to the impingement surface (25).

Abstract: A system for transferring heat to an impingement surface includes a first radial jet reattachment combustion nozzle operable to direct a flame toward the impingement surface and comprising a central longitudinal axis. The system also includes a second radial jet reattachment combustion nozzle operable to direct a flame toward the impingement surface and comprising a central longitudinal axis. The first and second nozzles are positioned such that the central longitudinal axes are substantially parallel and spaced apart such that flames directed from the first and second radial jet reattachment combustion nozzles interact with each other.

Abstract: An improved pneumatic match utilizes a vented conically shaped nozzle flare ositioned in a downstream region of a convergent nozzle to permit the match to be used in applications where fast functioning time is a necessity and where the fluid activating medium comprises a low helium pressure source or only high pressure air.