Vortex stabilizer

Mallubhotla, H. Edelstein, W.A. Earley, T.A. Belfort, G. Magnetic resonance flow imaging and numerical analysis of curved tube flow. 16. Effect of curvature and flow rate on Dean vortex stability and bifurcation. AIChE J. 2001, 47, 1126-1140. 

Figure 4-47. General sehematies of vortex-stabilized are discharges.

Interesting for applications is gliding arc stabilization in the reverse vortex (tornado) flow. This approach is opposite that of the conventional forward-vortex stabilization (Fig. 4-59a), where the swirl generator is placed upstream with respect to discharge and the rotating gas provides the walls with protection from the heat flux (Gutsol, 1997). Reverse... 

Process parameter Vortex stabilization Magnetic stabilization... 

Ivory, C. R, Preparative free-flow electrofocusing in a vortex-stabilized annulus. Electrophoresis 2004, 25, 360-374. 

Tracy, N. I. and Ivory, C. F., Preparative isoelectric focusing of proteins using binary buffers in a vortex-stabilized, free-flow apparatus. Electmphoresis 2004, 25,1748-1757. 

The irregularity in the color of the outer isosurface appears to indicate wave-like fluctuations in the near-wall pressure, i.e. near-wall turbulent boundary layer structures, consistent with what has been stated about the instability of the near-wall flow in Sect. 3.1.1. The low pressure in the inner part of the vortex and in the vortex finder is clearly to be seen. A very low pressure can be seen also to exist in the apex of the cone. Its location is consistent with what is seen experimentally when the vortex extends to the bottom of the cyclone, not terminating upon a vortex stabilizer or due to the natural... 

The vortex length can be influenced by the presence of a vortex stabilizing plate or cone. 

The equations assume that the cyclone is constructed with a roof skimmer or raceway and a vortex tube anti-creep skirt to minimize the detrimental effects of liquid creep, as well as a vortex stabilizing plate to prevent collected liquid from becoming re-entrained. 

At high solids or liquid loadings (> 10 vol.%, approximately) one must be careful not to unduly restrict the cone discharge opening or the annular space surrounding the vortex stabilizer, if the later are employed in the design. In some cases it may be necessary to eliminate the cone altogether and install a purely cylindrical-bodied cyclone. 

Obermair and Staudinger (2001) studied the gas flow, pressure drop and separation efficiency in cyclones with the dust outlet configurations shown in Fig. 15.1.9. The corresponding performance data is presented in Table 15.1.2. Upon comparison, we see that configuration a is not as efficient a design as the others. This is probably due to re-entrainment from the solids hopper. It does exhibit a comparatively low pressure drop, however. Its two vortex-stabilized... 

As with more conventional cyclones, a vortex stabilizer may also be installed in swirl tube type cyclones. Nevertheless, for reasons given above, one has to be most careful if the swirl tube is to be installed in a multicyclone configuration. One has to ensure that the underflow configuration can handle the flow maldistribution that always accompanies multicyclone configurations. Some examples of vortex stabilizers can be found in Chap. 13, which discusses demisting cyclones. 

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