Experimental measurement and numerical modeling of cavitating flow in converging-diverging nozzle

Rudolf, Pavel; Hudec, Martin; Zubík, Pavel; Štefan, David

doi:10.1051/epjconf/20122501081

Cited by 9 publications

(7 citation statements)

References 5 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Highly swirling flows are difficult to simulate because of the anisotropicity, which is induced by the prefered directions of the motion within the vortex. It has been proved for the draft tube swirling flows [13] and also for cyclones [8,11,12] that the best URANS model in this case is the Reynolds stress model. This model is able to capture the anisotropic features of the turbulent flow fields, whereas typical two equation models fail to predict both circumferential velocity profiles and axial velocity drop along the axis [1].…”

Section: Introductionmentioning

confidence: 92%

See 1 more Smart Citation

Simulation of multiphase flow in hydrocyclone

Rudolf

2013

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. Multiphase gas-liquid-solid swirling flow within hydrocyclone is simulated. Geometry and boundary conditions are based on Hsieh's 75 mm hydrocyclone. Extensive simulations point that standard mixture model with careful selection of interphase drag law is suitable for correct prediction of particle classification in case of dilute suspensions. However this approach fails for higher mass loading. It is also confirmed that Reynolds stress model is the best choice for multiphase modeling of the swirling flow on relatively coarse grids.

show abstract

Section: Introductionmentioning

confidence: 92%

“…Hydrocyclone flows still present a challenge for CFD modelling due to the mentioned reasons [1][2][3][4][5][6][7][8][9][10][11][12]. It is worth noting that many features of the hydrocyclone flows are very similar to behaviour of cavitating vortex rope in draft tubes of hydraulic turbines, see [13].…”

Section: Introductionmentioning

confidence: 99%

Simulation of multiphase flow in hydrocyclone

Rudolf

2013

EPJ Web of Conferences

View full text Add to dashboard Cite

show abstract

“…The method showed the motive jet shape satisfactorily but compression-expansion waves were less clear. Dvorak and Kotek [285], conducted PIV measurements for constant area mixing in a subsonic air ejector. The velocity fields were taken for four different mixing regimes, each with different ejection ratios.…”

Section: Flow Visualizationmentioning

confidence: 99%

Current Advances in Ejector Modeling, Experimentation and Applications for Refrigeration and Heat Pumps. Part 1: Single-Phase Ejectors

et al. 2019

View full text Add to dashboard Cite

Ejectors used in refrigeration systems as entrainment and compression components or expanders, alone or in combination with other equipment devices, have gained renewed interest from the scientific community as a means of low temperature heat recovery and more efficient energy use. This paper summarizes the main findings and trends, in the area of heat-driven ejectors and ejector-based machines, using low boiling point working fluids, which were reported in the literature for a number of promising applications. An overall view of such systems is provided by discussing the ejector physics principles, as well as a review of the main developments in ejectors over the last few years. Recent achievements on thermally activated ejectors for single-phase compressible fluids are the main focus in this part of the review. Aspects related to their design, operation, theoretical and experimental approaches employed, analysis of the complex interacting phenomena taking place within the device, and performance are highlighted. Conventional and improved ejector refrigeration cycles are discussed. Some cycles of interest employing ejectors alone or boosted combinations are presented and their potential applications are indicated.

show abstract

“…In our previous research Venturi tube has been extensively used to induce cavitation [6][7][8]. Thorough description of cavitation regimes was provided based on high-speed camera records and records of pressure pulsations.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of hydrodynamic cavitation through orifices of different geometries

et al. 2017

Self Cite

View full text Add to dashboard Cite

Abstract. Hydrodynamic cavitation in single and multihole orifices was experimentally investigated to assess their hydraulic characteristics: loss coefficients, inception cavitation number, cavitation number for transition to supercavitation. Significant difference for singlehole and multihole orifices was observed in terms of the measured loss coefficient. It is significantly more effective to use multihole orifices, where energy dissipation is much lower.It was found that using scaling factor given by ratio of orifice thickness suggests linear behaviour of both loss coefficient and inception cavitation number. Orifices seem to be convenient choice as flow constriction devices inducing cavitation due to their simplicity.

show abstract

Experimental measurement and numerical modeling of cavitating flow in converging-diverging nozzle

Cited by 9 publications

References 5 publications

Simulation of multiphase flow in hydrocyclone

Simulation of multiphase flow in hydrocyclone

Current Advances in Ejector Modeling, Experimentation and Applications for Refrigeration and Heat Pumps. Part 1: Single-Phase Ejectors

Experimental investigation of hydrodynamic cavitation through orifices of different geometries

Contact Info

Product

Resources

About