| 摘要 |
The static mixer (1) for a low viscosity fluid (20) contains inbuilt devices (10) effective for mixing, which are arranged in a pipe (3) or in a container conducting the fluid. The geometry of the inbuilt devices is largely that of a base structure. The inbuilt devices include structure elements (11, 11', 12) in the form of flat, folded or curved sheet metal-like flow obstacles as well as constrictions lying therebetween. A flow of the first order can be achieved by inbuilt devices in the form of the base structure and is a flow mixing the pipe contents globally in downstream mixing regions. The structure elements of the base structure can be described as segments, plates and/or vanes. The structure elements - called "primary flow obstacles" (11, 11', 12) in the following - are geometrically modified at surfaces and/or at edges. Local flows of the second order can be induced by these modifications which are superimposed on the flow of the first order and so improve the mixing quality. Radial and axial inhomogeneities in the fluid are namely better compensated than by the flow of the first order. Secondary flow obstacles (11a, 11a', 12a) form the modifications by which the turbulence is locally intensified and/or backflows are induced.
|
