Shapes of deep rectangular water conduit intakes

Conclusions

• 1. Theoretically obtained non-separation outlines of pressure conduits intake headings recommended in the article [1], have excessive width (funnelling). It can be decreased if the design of the above-mentioned outlines is done by the N. E. Zhukovskii equations on the assumption that there is a straight flow line in the stream and there are real values of parameter K₁ corresponding to that line.

• 2. Coefficients C_v.max' C ^′_v.max and K_cr used in the article [1] for the evaluation of vacuum and cavitational qualities of deep conduits intakes do not fully reflect the physics of the phenomena (especially for a case of a considerable pressure pulsation increasing with separation of flow from conduit walls). From our point of view, the vacuum coefficient K_vac and the coefficient K_cav for the start of cavitation are best suited for an actual evaluation because they are directly connected with appearance of vacuum and cavitation in the conduit.