Experimental Investigation of Fluidic Diodes

Khabarova, D. F.; Podzerko, A. V.; Spiridonov, E. K.

doi:10.1016/j.proeng.2017.10.443

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…For this purpose, a mathematical model of fluid flow through a hydrodiode has been developed, diaphragm and vortex diodes with the necessary characteristics have been designed, numerical modeling by the finite element method in the Ansys Fluent program has been carried out. The development of a mathematical model for modeling a flow part with a hydraulic diode was carried out taking into account the following assumptions [5]:…”

Section: Methodsmentioning

confidence: 99%

Ensuring the safety of chemical dosing

Shaidakov

Шестакова

Barabanov

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The article deals with the issues of ensuring the safe dosing of small volumes of chemical reagents with positive displacement pumps. The results of simulation of hydrodynamic processes in valve assemblies are presented. Studies have shown the low efficiency of the reagent supply process using ball and poppet valves. The use of hydraulic diaphragm and vortex diodes is proposed. Based on amathematical modeling, the design features of hydrodiodes and the parameters of their effective operation are substantiated, which makes it possible to exclude fluid pulsation and increase the flow rate. A diaphragm hydrodiode is suitable for a metering pump with a flow rate of at least 5 l/h. The vortex is capable of replacing ball and poppet valves at low and ultra-low flows, and it has been established that its diode resistance is more than 6, and its diode is more than 2 in terms of flow.

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Section: Methodsmentioning

confidence: 99%

Ensuring the safety of chemical dosing

Shaidakov

Шестакова

Barabanov

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…In this respect, tapered tube segments of a fixed geometry are normally used, with the hydraulic losses being higher when the flow is directed towards the divergent part of the tube, owing to flow separation, than when the flow is directed towards the convergent part [4]. In [5], a so-called vortex fluid diode was experimentally examined as a flow rectifier, and it was found, under steady-flow conditions, to reach a diodicity (i.e., the ratio of reverse to forward hydraulic losses) close to 2 for Re greater than 3000. A similar diodicity was found at much lower Re (Re = 36) in a Tesla micro valve [6]; whereas in [7], it was shown that the performance of the latter valve is superior under pulsating flow conditions.…”

Section: Introductionmentioning

confidence: 99%

Valveless Pumping with an Unsteady Stenosis in an Open Tank Configuration

Manopoulos,

Mathioulakis

2024

Fluids

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This work examines the beneficial role of an unsteady stenosis, not driven by any external energy source, as a means for augmenting the flow rate of a valveless pump in a hydraulic loop, including an open tank. In contrast to our previous work, in which the concept of the latter stenosis was introduced for the first time in a horizontal closed loop, here, gravity was taken into account. The stenosis neck cross-sectional area was controlled by the fluid pressure and the opposing force applied externally by a spring of adjustable tension. A pincher compressed and decompressed a part of the pump’s flexible tube periodically, with frequencies from 5 Hz to 11 Hz and compression ratios Ab from 24% to 65%. The presence of the stenosis increased the net flow rate by 19 times for Ab = 24% and 6.3 times for Ab = 38%; whereas for Ab = 65%, the flow rates were comparable. The volumetric efficiency varied from 30% to 40% under the presence of the stenosis, and from 2% to 20% without the stenosis. The role of the stenosis was to cause a unidirectional flow, opening during tube compression and closing during decompression. The pressure amplitudes along the flexible tube increased towards the rigid–flexible tube junction (as a result of the wave reflections), which were found to be significantly attenuated by the presence of the stenosis, whereas the flow rate pulsations did not exceed 10% of the mean at the peak net flow rates.

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