Abstract
The paper deals with a flow field inside the so-called vortex valve, used as an outlet device on retention reservoirs for retention of rainstorms and later slow outflow into sewerage etc. The system is very simple, without moving parts. Using the method of numerical flow simulation, the unusual flow characteristic Δp = f(Q), containing two branches, is explained. Further, there it is studied influence of both inlet/outlet opening sizes on the form of the characteristic. Results can be used for designing the new model series of valves for various flows.
Highlights
The paper deals with a flow field inside the so-called vortex valve, used as an outlet device on retention reservoirs for retention of rainstorms and later slow outflow into sewerage etc
Results can be used for designing the new model series of valves for various flows
The aim of the presented study is the statement of the resistance–flow characteristic Δp[Pa] = f(Q[m3/s]) for the so-called vortex valve, mounted usually on the outlet from the retention reservoir
Summary
The aim of the presented study is the statement of the resistance–flow characteristic Δp[Pa] = f(Q[m3/s]) for the so-called vortex valve, mounted usually on the outlet from the retention reservoir. Such a reservoir is used for instance as the retention of the rainstorm or and for the consecutive slow outflow into drainage etc. 2. Chamber – cylindrical, with tangential inlet and axial outlet. Outer surroundings (air) – is minimalized here, a smaller volume of the model means shorter time of the solution In this model, the flow resistance of the valve is solved, only, the shape of the outer flow (or its spraying quality) is not important here
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