A CFD Multidimensional Approach to Hydraulic Components Design

Franzoni, Federica; Milani, Massimo; Montorsi, Luca

doi:10.4271/2007-01-4196

Cited by 7 publications

(5 citation statements)

References 18 publications

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“…The turbulent behavior of the fluid was addressed by means of a two-equation komega SST model in order to accurately predict the flow evolution in the viscous sublayer and in the free-stream region, as it combined the insensitivity to free-stream conditions of the k-epsilon model in the far-field with the advantages of the k-omega model near walls. Actually, several turbulence models were compared in [24], and the k-omega SST model showed particular accuracy in the prediction of the fluid-dynamic performance of the analyzed hydraulic components. This model's choice was further supported by the Wall-Y+ considerations since values slightly smaller than one were measured at the most critical areas of the fluid domain, such as in the gears' region and within leakages, due to the extremely reduced mesh size near walls.…”

Section: Methodsmentioning

confidence: 99%

About the Influence of Eco-Friendly Fluids on the Performance of an External Gear Pump

et al. 2021

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This paper wants to investigate the effects of eco-friendly fluids on the thermo-fluid-dynamic performance of external gear pumps in order to provide a first response to the increasingly urgent demands of the green economy. A computational fluid dynamics (CFD) approach based on the overset mesh technique was developed for the simulation of the full 3D geometry of an industrial pump, including all the characteristic leakages between components. A sensibility analysis of the numerical model with respect to different fluid properties was performed on a commonly used mineral oil, showing the key role of the fluid compressibility on the prediction of the pump volumetric efficiency. Moreover, the influence of temperature internal variations on both fluid density and viscosity were included. The BIOHYDRAN TMP 46 eco-friendly industrial oil and olive oil were further considered in this work, and the results of the simulations were compared for the three fluid configurations. A slightly lower volumetric efficiency was derived for the olive oil application against the other two conditions, but suggestive improvements were produced in terms of pressure and temperature distributions. Therefore, based on the obtained results, this paper encourages research activity towards the use of eco-friendly fluids in the hydraulic field.

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Section: Methodsmentioning

confidence: 99%

About the Influence of Eco-Friendly Fluids on the Performance of an External Gear Pump

et al. 2021

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“…The first one, Cq, is the efflux coefficient, and it is generally addressed to modify the reference area used for calculating the fluid velocity. For the purpose of this work, and according to the sensitivity analysis detailed in [14], all the orifices are characterized by adopting an efflux coefficient equal to 0.95. The second corrective parameter, Cm, is generally indicated as the mass flow-rate coefficient and, with respect to an isentropic subsonic efflux, it has to be expressed as:…”

Section: Numerical Modelmentioning

confidence: 99%

Numerical analysis of an entire ceramic kiln under actual operating conditions for the energy efficiency improvement

Milani

Montorsi

Stefani

et al. 2017

Journal of Environmental Management

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The paper focuses on the analysis of an industrial ceramic kiln in order to improve the energy efficiency and thus the fuel consumption and the corresponding carbon dioxide emissions. A lumped and distributed parameter model of the entire system is constructed to simulate the performance of the kiln under actual operating conditions. The model is able to predict accurately the temperature distribution along the different modules of the kiln and the operation of the many natural gas burners employed to provide the required thermal power. Furthermore, the temperature of the tiles is also simulated so that the quality of the final product can be addressed by the modelling. Numerical results are validated against experimental measurements carried out on a real ceramic kiln during regular production operations. The developed numerical model demonstrates to be an efficient tool for the investigation of different design solutions for the kiln's components. In addition, a number of control strategies for the system working conditions can be simulated and compared in order to define the best trade off in terms of fuel consumption and product quality. In particular, the paper analyzes the effect of a new burner type characterized by internal heat recovery capability aimed at improving the energy efficiency of the ceramic kiln. The fuel saving and the relating reduction of carbon dioxide emissions resulted in the order of 10% when compared to the standard burner.

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“…16 This approach demonstrated in previous studies a good accuracy in predicting the flow field for multi-phase flows in hydraulic components. 17 The computational domain accounted for in the simulations includes the injector hole, the helical ducts and the injector body comprising the needle and the inlet duct. Downstream of the injector outlet a large plenum is considered in order to represent the open ambient at atmospheric pressure where the liquid spray is forming.…”

Section: Analysis Of the Single Injectormentioning

confidence: 99%

Numerical analysis of the interaction between high-pressure resin spray and wood chips in a vapour stream

Milani

Montorsi

Lai³

et al. 2016

Advances in Mechanical Engineering

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This article investigates the interaction between the resin spray and the wood chips in a vapour stream using a multi-phase multi-component computational fluid dynamics approach. The interaction between the spray and the chips is one of the main issues in the industrial process for manufacturing medium density fibre boards. Thus, the optimization of this process can lead to important benefits, such as the reduction in the emission of formaldehyde-based toxic chemicals, the reduction in energy consumption in the blending process and energy saving in the fibreboard drying process. First step of the study is the numerical analysis of the resin injector in order to extend the experimental measurements carried out with water to the resin spray. The effects of the injector's geometrical features on the spray formation are highlighted under different injection pressure values and needle displacements. Afterwards, the results obtained in the analysis of the single injector are used for the complete simulation of multi-injector rail where the mixing of the resin spray and wood chips takes place. The influence of the main operating conditions, such as the vapour and the wood chip flow rates, on the resin distribution is addressed in order to optimize the resination process

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A CFD Multidimensional Approach to Hydraulic Components Design

Cited by 7 publications

References 18 publications

About the Influence of Eco-Friendly Fluids on the Performance of an External Gear Pump

About the Influence of Eco-Friendly Fluids on the Performance of an External Gear Pump

Numerical analysis of an entire ceramic kiln under actual operating conditions for the energy efficiency improvement

Numerical analysis of the interaction between high-pressure resin spray and wood chips in a vapour stream

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