Aim of the study Aim of the paper was to map the bistable characteristics of vortex flow controls (VFCs) and to indicate optimal geometry parameters of the tested ones, such as: chamber diameter, inlet and outlet orifice area for set project conditions. In addition, the method for assessing the range of effective use of VFCs was verified on the base of the so-called swirl parameter in regard to the obtained numerical modelling results. Materials and methods During the research, numerical modelling (CFD) determined the flow set by a tested VFCs for a given disposable pressure head. Series of calculation were run for three variants of the VFCs geometry. Numerical solution of the flow model equations of single-phase non-compressible liquid (Reynolds Averaged Navier-Stokes) together with the closing equations of the k-ε turbulence model were made in the FLOW 3D computer program. Results and conclusions Obtained characteristics of the VFCs expenditure based on numerical calculations are bistable (two-branch process separated by an unstable zone), which was previously confirmed in laboratory experiments carried out in different research. The method for assessing the scope of effective operation of vortex flow controls devices based on the so-called swirl parameter was positively verified in the light of the results of numerical modelling, which allows for optimal dimensioning of VFCs and their proper selection for specific operating conditions.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.