Mean Pressure Distributions on the Vanes and Flow Loss in the Branch in a T Pipe Junction with Different Angles

Yin, Yantao; Chen, Kai; Qiao, Xiaoyu; Mu, Luwen; Lin, Zhihong; Wang, Qiuwang

doi:10.1016/j.egypro.2017.03.718

Cited by 14 publications

(5 citation statements)

References 6 publications

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“…Por ejemplo, Morales (2017) exploró la pérdida de resistencia en la transmisión neumática de flujos bifásicos de gas-sólidos en T 21 . Yin (2017) se centró en la reducción de la presión de las estructuras en T teniendo en cuenta varios ángulos de aletas guía 22 .…”

Section: Símbolos Griegos Cunclassified

Conducto en T biomimético para reducir la resistencia local de un sistema de ventilación y aire acondicionado

Gao,

Liu,

et al. 2019

Re-Descubriendo El Mundo Natural: La Biomimesis en Perspectiva

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Tongtai Fire and Security Co., (Shanghái) E l ahorro de energía en los edificios es una de las medidas importantes que se utilizan para reducir la escasez de energía y fomentar el desarrollo sostenible 1-3 . El consumo de energía de los sistemas de conductos de ventilación y aire acondicionado (como, por ejemplo, los tipos de sistemas de transporte y distribución de aire) ha recibido considerable atención. El consumo de energía del ventilador causado por la resistencia de los sistemas de ventilación y aire acondicionado representa aproximadamente del 20% al 40% del consumo de energía de los edificios públicos; para algunos edificios, los niveles son incluso superiores a los de los sistemas de refrigeración acondicionados 4,5 . Por lo tanto, determinar cómo optimizar el rendimiento de los sistemas de conductos de ventilación y aire acondicionado, reduciendo así la resistencia y disminuyendo el consumo de energía del ventilador, se ha convertido en un tema clave.Al buscar equipo eficiente de energía para edificios, los investigadores han considerado la morfología y comportamiento de animales y plantas como inspiración. Por ejemplo, Chen (2017) estudió el método de búsqueda de fuentes de contaminación mediante robots a través de la simulación de los comportamientos del olfato y búsqueda por parte de diversos animales 6 . Liu Z (2017) introdujo un modelo de estimación rápida para la concentración de contaminantes basado en el aprendizaje automático [7][8] . Zeiny (2012) aplicó principios biomiméticos a los diseños de construcción tipo concha y usó la luz del sol para reducir el consumo de energía de la iluminación interior 9 . Reddi (2012) abordó el rendimiento autoajustable de la temperatura y la estabilidad estructural del suelo basándose en la piel animal 10 . Zhao (2010) estudió la estructura de un nido de termitas y su capacidad para mantener una temperatura ambiente constante y aplicó los hallazgos al Zimbabwe Eastgate Center 11 . Zalewski (2002) analizó la aplicación y optimización de termosifones en las chimeneas solares 12, 13 . Kirchner (2002) propuso un modelo de evacuación con base en el comportamiento de los rebaños y analizó los factores que influyen en el tiempo de evacuación 14 . A partir del principio de reparación

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Section: Símbolos Griegos Cunclassified

Conducto en T biomimético para reducir la resistencia local de un sistema de ventilación y aire acondicionado

Gao,

Liu,

et al. 2019

Re-Descubriendo El Mundo Natural: La Biomimesis en Perspectiva

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“…Flow field characteristics are the basis of acoustic studies, and several researchers have performed a number of experiments and numerical simulations [1][2][3] on tee junctions. Beneš et al [4] explored the laminar and turbulent flow characteristics of Newtonian and non-Newtonian fluids based on numerical simulation, and the results showed that the explicit algebraic Reynolds stress turbulence model [5] could capture the secondary flow in the branch pipe.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of 3D Flow Field and Flow-Induced Noise Characteristics in a T-Shaped Reducing Tee Junction

Lv¹,

Wang²,

Guo³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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The so-called T-shaped reducing tees are typically used to divide, change and control (to a certain extent) the flow direction in pipe networks. In this study, the Ffowcs Williams-Hawkings (FW-H) equation and the Large Eddy Simulation (LES) methods are used to simulate the flow-induced noise related to T-shaped reducing tees under different inlet flow velocities and for different pipe diameter ratios. The results show that the maximum flow velocity, average flow velocity, and vorticity in the branch pipe increase gradually as the related diameter decreases. Strong vorticity and secondary flows are also observed in the branch pipe, and the associated violent pressure fluctuations are found to be the main sources of flow-induced noise. In particular, as the pipe diameter ratio decreases from 1 to 0.45, the Total Sound Pressure Level (TSPL) increases by 6.8, 6.26, and 7.43 dB for values of the inlet flow velocity of 1, 2, and 3 m/s, respectively. The distribution characteristics of the flow-induced noise in the frequency domain follow similar trends for different pipe diameter ratios.

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“…While in the past investigations, considerable work has been devoted to the study of two-phase flow in the basic Y-junction microchannel applicable in pharmaceutical and biomedical industry [9][10][11][12]. However, only a few work [13][14][15] considered the effect of junction angle on the gas-liquid two-phase flow patterns and micro-bubble/droplet generation characteristics which determine the controllable application range of the micro-products. Therefore, more attention is paid to the influence of the Y-junction angle on the gas-liquid two-phase flow and bubble characteristics in this study.…”

Section: Introductionmentioning

confidence: 99%

Dimensionless Analysis of the Effects of Junction Angle on the Gas-Liquid Two-Phase Flow Transition and the Scaling Law of the Microbubble Generation Characteristics in Y-Junctions

Han

Liu

et al. 2022

Sustainability

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Gas-liquid two-phase flow patterns and gas slug hydrodynamics were experimentally studied in three Y-junctions with different junction angles of 60°, 90° and 120°. Microbubbles were generated in the sodium alginate aqueous solution with the surfactant Tween20. Four main flow patterns were observed, i.e., stratified flow, annular flow, dispersed bubble flow and slug bubble flow. The formation mechanism of the bubble flow was explained by a force analysis, which was based on the dimensionless analysis regarding Capillary number, Weber number and Euler number. The transition criteria of the gas-liquid two-phase flow patterns was set up by these three dimensionless numbers. Additionally, the characteristics of the slug bubble were investigated, which made a scaling criterion for eliminating the influence of the angle factor become possible. A new scaling law (validity range within 2.88 < Re1 < 14.38, 0.0068 < We1 < 0.1723) was proposed to predict the bubble size and it showed a good agreement with the experimental results.

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Mean Pressure Distributions on the Vanes and Flow Loss in the Branch in a T Pipe Junction with Different Angles

Cited by 14 publications

References 6 publications

Conducto en T biomimético para reducir la resistencia local de un sistema de ventilación y aire acondicionado

Conducto en T biomimético para reducir la resistencia local de un sistema de ventilación y aire acondicionado

Numerical Simulation of 3D Flow Field and Flow-Induced Noise Characteristics in a T-Shaped Reducing Tee Junction

Dimensionless Analysis of the Effects of Junction Angle on the Gas-Liquid Two-Phase Flow Transition and the Scaling Law of the Microbubble Generation Characteristics in Y-Junctions

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