Hydraulic Loss of Finite Length Dividing Junctions

Tomor, András; Kristóf, Gergely

doi:10.1115/1.4034876

Cited by 14 publications

(4 citation statements)

References 33 publications

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“…Detailed works on theoretical models and experimental studies of incompressible flow were carried out in earlier studies. [4][5][6][7] Similarly, in the case of compressible flow, notable experimental work is reported by Trengrouse. 8 All the literature discussed above deals with flow distribution through a pipe with a single row of branch pipes.…”

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confidence: 87%

Computational fluid dynamics simulation of the supercritical carbon dioxide flow in beam dyeing

Reji¹,

Raman

Ty³

et al. 2018

Textile Research Journal

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The recent development in the technologies of supercritical carbon dioxide (S-CO 2 ) has caused a remarkable change in the dyeing process in the textile industry. The conventional wet-dyeing process using water is being replaced with the dry-dyeing process using S-CO 2 . The uniform addition of coloring material is necessary for any dyeing process. In the case of the beam dyeing process, an equal distribution of the dye fluid through the porous beam has to be ensured in order to achieve an evenly distributed dyeing. The present study focuses on the fluid dynamics aspects of the S-CO 2 beam dyeing process in order to study the flow characteristics and thereby obtain performance improvement. Computational fluid dynamics analyses were carried out and the methodology is validated with experimental results from a previous study. The flow distribution of S-CO 2 through a porous beam is analyzed at different conditions, such as varying the operating pressure, mass flow rate and inlet temperature. The comparison of compressible and incompressible flow through beam dyeing is also discussed. The current study revealed that the increase in mass flow rate through the system leads to higher non-uniformity in distribution. The operating pressure and inlet temperature were found to significantly affect the flow distribution. The flow reversal condition showed a mass flow distribution opposite to that of the normal flow condition. The cyclic flow condition with periodic normal and the reversed flow condition provide better uniformity in distribution of the flow than the normal flow condition. The present results provide guidelines to improve the levelness of the dye distribution in the fabric material. Keywords supercritical carbon dioxide, beam dyeing, porous beam, level dyeing, coefficient of dischargeDyeing is the process of adding color to textile products, such as fibers, yarns and fabrics. Dyeing is an essential process in the textile industry and uniform dyeing over the material surface is one of the objectives of the dyeing process. Dyeing processes of textile materials are carried out by allowing dye fluid to flow thoroughly. During this process, dye molecules form a strong bond with the substrates. One of the widely used types of dyeing process is beam dyeing with water as the dyeing fluid. Dry-dyeing with supercritical carbon dioxide (S-CO 2 ) has more advantage than the wet-dyeing process from both economic and environmental perspectives. S-CO 2 dyeing simplifies the dyeing process compared with wet-dyeing by eliminating contaminated water discharges, reducing consumption, excluding drying, discarding chemical level agents and diminishing air emission. The development of S-CO 2 technologies has replaced the use of dyeing fluid from water to S-CO 2 .The S-CO 2 beam dyeing process is a state-of-the-art technology in the textile industry. The main components of the beam dyeing vessel are a porous beam, a dyeing vessel and associated pipe connections. Figure 1, a schematic of the sectioned view, illustrates the

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mentioning

confidence: 87%

Computational fluid dynamics simulation of the supercritical carbon dioxide flow in beam dyeing

Reji¹,

Raman

Ty³

et al. 2018

Textile Research Journal

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“…They also discussed the ejection angle of the jet from the slot(s) and showed that the angle varied in the streamwise location. Tomor and Kristóf (2017) showed that the loss coefficient at the flow dividing section depends on four parameters: the Reynolds number, the ratio of the velocity in the subpipe and main pipe, the ratio of cross-sectional areas between the subpipe and the main pipe, and the ratio of the subpipe length and main pipe diameter.…”

Section: Theoretical Investigation Of Discharge and Pressure Distribu...mentioning

confidence: 99%

Theoretical investigation of discharge and pressure distribution of a pipe with a continuous longitudinal slot

Nishio

Ogawa

Toda

et al. 2022

JFST

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This study provides detailed information on the pressure distribution inside a pipe with a continuous longitudinal slot, theoretically investigating the parameter dependency of the pressure distribution on the design parameters of the pipe: Reynolds number at the inlet, aspect ratio of the pipe, slot width, and pressure loss coefficient of the slot. The flow through a pipe with a continuous longitudinal slot is theoretically modeled in one dimension. The model follows the mass and energy conservation laws and considers the pressure loss at the slot. The results show that depending on the aspect ratio of the pipe and the Reynolds number at the inlet, the pressure distribution inside the pipe is categorized into three regimes: monotonically increasing, monotonically decreasing, and downward concave profiles. A parametric study indicates that a monotonically decreasing profile appears for a high aspect ratio pipe. A lower aspect ratio pipe, on the other hand, has a monotonically increasing pressure profile. The present paper also reports the effects of the slot width and pressure loss coefficients on the pressure distribution, indicating that the regime of the pressure distribution is mathematically predictable using the function of the design parameters.

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“…It is the different mixes of conditions of these valves that permit complex control conduct utilizing a complex. [1][2][3][4][5].…”

Section: Hydraulic Manifoldmentioning

confidence: 99%

Design and Fabrication of Industry Based Hydraulic Manifold Using Additive Manufacturing

Dhineshbabu¹,

A²,

Prithivi³

et al. 2021

IRJASH

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The main objective of our project is to re-design the hydraulic manifold and fabricate the prototype using 3D printing to reduce weight, improve flow performance and reduce the cost. The simple existing industrial manifold block is designed using CAD software. Then analysis of the flow field characteristics and change in pressure of right-angled flow passage of supply line and return line is carried out in the typical hydraulic manifold block which is made from the conventional manufacturing process. Then to redesign the industrial manifold effectively with angled flow passage and analyze the optimization level. This modified design mainly reduces the major loss in the fluid called pressure loss and reduces the velocity of fluid during the change in direction of flow. As we are in the era of industry 4.0, the fabrication of this product is to be made with the currently emerging technology called additive manufacturing. Another reason to go with AM is because of the complex structure of this manifold. It will significantly reduce the production time and machining cost. Our project comes up with producing the 3D printed prototype of the modified manifold from the industry.For this analysis process, we have selected the materials Aluminium alloy (AL 6061-T6) and Stainless steel (SS-316), because of their high strength to weight ratio and low material cost. Hence it will reduce the overall production cost and it will greatly reduce the weight.

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Hydraulic Loss of Finite Length Dividing Junctions

Cited by 14 publications

References 33 publications

Computational fluid dynamics simulation of the supercritical carbon dioxide flow in beam dyeing

Computational fluid dynamics simulation of the supercritical carbon dioxide flow in beam dyeing

Theoretical investigation of discharge and pressure distribution of a pipe with a continuous longitudinal slot

Design and Fabrication of Industry Based Hydraulic Manifold Using Additive Manufacturing

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