Vortex valve

Abstract

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.

Vortex Valve – Principle, Design and Application

“…Used model [6] contains six liquid bodies, see the Fig. 1, without surrounding retention reservoir -it assumes that the velocity range in such surrounding can be neglected in comparison with flow inside the studied valve.…”

“…3 above solves the operating conditions in the range 0-20 kPa and 8-18 kg/s [6]. The next task is to check the suitability of the procedure above for similar pressure gradients of 16-20 kPa, but for higher flows of 22-125 kg/s [7].…”

“…The first part deals with creation of unusual branched characteristic pressure-flow of the valve and of basics of designing main valve dimensions for given water level and water flow [6]. The second part deals with valve adaptation for lower water levels together with higher water flows [7].…”

Controlled outflow of storm water without flooding

“…In the previous work [7], the analysis and solution of vortex valves were made for lower flow rates, therefore, here, it should be repeated the main results, partially used for higher flow rates.…”

“…The principle of valve activity is described curiously by Mr. Google and many dealers and producers, for instance, as "the effect is given by flow phenomenon" or "it works on the principle of hydraulic phenomenon". Reality is not so mysterious, the flow inside of such a valve is possible to describe by numerical flow simulation, completed by some essential equations of fluid mechanics, see [1][2][3][4][5][6][7] etc.…”