Pressure Losses in Multiple-Elbow Paths and in V-Bends of Hydraulic Manifolds

Zardin, Barbara; Cillo, Giovanni; Borghi, Massimo; D’Adamo, Alessandro; Fontanesi, Stefano

doi:10.3390/en10060788

Cited by 17 publications

(9 citation statements)

References 13 publications

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“…That is, the pressure at the outlet of the test section. The date of the test section is recorded by the DAQ card (15) and calculated by a LabVIEW program (LabVIEW 2018, National Instruments, Austin, TX, USA) on the analysis recorder (16). The DAQ card consists of input module NI9203, output module NI9266 and compact DAQ chassis cDAQ-9185 manufactured by National Instruments (USA).…”

Section: Methodsmentioning

confidence: 99%

“…However, it also has a strong influence on the total pressure loss when the structure is composed of an elbow and tee junction, multijunctions or multielbows, especially when the distance between each is small. As shown in [16] for the case of multiple-elbow paths, the total pressure loss cannot be calculated simply as the sum of the single losses. When the reciprocal distance between the elbows is greater than five times the channel diameter, the elbows have less of an effect on each other, and when the distance becomes higher than 13 times the channel diameter, the elbows do not affect each other.…”

Section: Introductionmentioning

confidence: 99%

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A Numerical Investigation of the Influence of Geometric Parameters on the Performance of a Multi-Channel Confluent Water Supply

Zhao¹,

Li²,

Zhu³

2019

Energies

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Transportation efficiency is a problem of particular interest in multi-channel confluent water supply engineering. Transportation efficiency depends not only on the system control strategy but also on the pressure loss (pressure difference between the inlet and outlet) and pressure drop (amplitude of outlet pressure fluctuations) of its structure. In this article, sensitivity analyses of the pressure loss and pressure drop to changes in multi-channel confluent water supply geometry are presented. An experimental set-up was established to validate computational fluid dynamic (CFD) predictions and obtain the boundary conditions for two-channel synchronous switching. The influences of the geometric structure varies by the clustered pipe diameter (40 mm < Dc < 80 mm), main pipe diameter (30 mm < Do < 80 mm), channel pitch (60 mm < L < 400 mm) and number of channels (2 ≤ n ≤ 4); those variables were investigated with the help of CFD simulations. The results showed that configuration “C” can be considered a costless method of decreasing pressure loss (βC(2.05) < βA(2.42) < βB(2.64)) and that the different configurations are insensitive to pressure drop. The variations of the influence of channel pitch and clustered pipe diameter on pressure loss have extremes at L/d = 5 and Dc/d = 2.5, respectively, but the effect on pressure drop is not obvious. The main pipe diameter and the inlet velocity have more significant influences on efficiency. The results can be used to choose the proper geometry of multi-channel confluent water supply to enable energy savings.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Numerical Investigation of the Influence of Geometric Parameters on the Performance of a Multi-Channel Confluent Water Supply

Zhao¹,

Li²,

Zhu³

2019

Energies

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“…They testify the results applying the CFD analysis to a hydraulic manifold. Moreover, CFD is an effective tool and can be used to study the pressure drop along the passage with multiple elbows [23,24]. Whereas, the researches mentioned above circumscribe the optimization in traditional manufacturing methods.…”

Section: Introductionmentioning

confidence: 99%

3D Printing for Energy-Saving: Evidence from Hydraulic Manifolds Design

et al. 2019

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With the compact circuit layout and small size, hydraulic manifolds sometimes cause high pressure loss. The purpose of this paper is to investigate the pressure loss under different circumstances with various geometry features and present solutions to reduce pressure loss. The pressure loss performance is evaluated by both experimental and numerical methods. Verified by the experiments, the numerical simulations are qualified to depict the correct trend of the pressure drop. After the basic analysis of traditional passages, three novel forms are proposed, which are very hard to be manufactured by a common method. Furthermore, the geometrical features are selected optimally by means of full factorial experiments to balance the pressure loss and space requirement. Moreover, taking advantage of 3D printing, it is possible to build the passages in novel forms which are beyond the capacity of conventional manufacturing. Results show that the pressure loss can be reduced considerably by adopting a smooth transition, where the reduction can reach up to 50%.

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“…Zardin et al in [14,15] tackle the problem of estimating the pressure losses in the hydraulic manifolds present in almost all mobile hydraulic machines. The design of these manifolds present challenges related to the complex layout and the requirements of low cost and compactness.…”

Section: Fluid Power Componentsmentioning

confidence: 99%

“…New approaches for the analysis, modeling, and design of hydraulic and pneumatic components This book contains the successful invited submissions [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] to the Special Issue.…”

mentioning

confidence: 99%