Patent ID: 8763362

Claim:
An injector element apparatus comprised of: an injection tube having a circular cross-section, said injection tube comprised of: a mixing interface having a constant mean spray angle of deflection of between 60 and 90 degrees; a plurality of tangential inlets which are tangential relative to the inner surface of said injection tube; an injection tube cap partially covering said injection tube comprised of: an upper portion containing a plurality of variably shaped inlet slots axially aligned with said plurality of tangential inlets and tangential relative to the inner surface of said injection tube cap, and a lower portion configured to slide axially within said spring recess; and a spring mechanism contained within said spring recess and exerting axial force against said injection tube cap, wherein axially pressure applied on said injection tube cap compresses said spring mechanism and overlaps at least one of said variable shaped inlet slots with at least said tangential inlets, wherein each of said plurality of variably shaped inlet slots has a shape selected from a group of geometric slot shapes consisting of polygon, irregular polygon and oval; wherein each of said geometric slot shapes has a geometric shape predetermined geometric effectiveness coefficient value d eff ; and wherein d eff is a value equal to or less than 1 and wherein said value is sufficient to maintain said constant mean spray angle of deflection θ, wherein said mean angle of deflection θ is calculated as follows: θ = 43.5 ⁢ log ⁢ ⁢ 14 ⁢ ( ( π ⁢ ⁢ r h ⁢ R a ) ⁢ ( r h R - d eff ⁢ a / π 2 ) ) , wherein r h is a radius of an outlet of said injector tube, R is a radius of said injector tube as measured adjacent to said outlet, and a is a tangential area of one of said tangential inlets.