Effect of delivering water into a flow core in the hydraulic operating conditions of eddy shaft outlets

Conclusions

Model investigations of the hydraulic operating conditions of the eddy shaft outlet of the Tel'mam hydro development wed that: under conditions of no delivery of air and water into the core at those places where the latter closely approaches tl--duit wall, a pressure dangerous in a cavitation respect is observed: delivery of water into the core by separating the flow swirler by a partition with a hole does not promote a decrease vacuum either in the core itself or on the conduit walls; the presence of an axial flow in the end of the swirler considerably (by 22.3%) increases the discharge of the outlet simultaneously with a decrease of the vacuum in the core the cavitation conditions on the tunnel walls worsen; the proportion of the axial flow in the outlet capacity increases with increase of the intensity of swirling the flow l swirler and the distribution of the piezometric pressure along the outlet tunnel is preferable.