Effect of intake head wall and trash rack on vortices

Figures & data

Figure 1 Types of vortices (Knauss 1987)

Figure 2 Schematic side view of physical model

Table 1 Types of vortices for various flow conditions with different intake head wall slopes

Table 2 Vortex stability for various flow conditions and intake head wall slopes

Table 3 Vortex type with presence of trash rack

Figure 3 Relationship between vortex type and measured circulation number N _Γ

Figure 4 Comparison of empirical Eqs (2) and (3) with Eq. (7)

Knauss , J. 1987 . Swirling flow problems at intakes. IAHR Hydraulic Structures Manual 1 , 13 – 38 . Rotterdam, , The Netherlands : Balkema .

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