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Lulu Zhai, Chao Lu, Jia Guo, Zuchao Zhu and Baoling Cui
Multistage pumps with blade-type guide vanes are widely used in offshore oil production, the petrochemical and coal-chemical industries, and nuclear power fields for its advantages of large flow rate, high pressure, and excellent operation stability. How...
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Jaroslav ?tigler
The derivation of the mean velocity profile for a given vorticity distribution over the pipe cross-section is presented in this paper1. The velocity profile and the vorticity distribution are axisymmetric, which means that the radius is the only variable...
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Mingdian Liu, Junqiang Lin, Qidong Peng, Lixiong Yu, Daqing Chen, Shaoping Liu and Xinbin Duan
Hydrodynamic characteristics of spawning grounds are important factors affecting the spawning of four major Chinese carps (Mylopharyngodon piceus, Ctenopharyngodon idella, Hypophthalmichthys molitrix, and Aristichthys nobilis). To investigate the relatio...
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Mingdian Liu, Junqiang Lin, Qidong Peng, Lixiong Yu, Daqing Chen, Shaoping Liu and Xinbin Duan
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Jiyang Qi, Jie Yin, Fei Yan, Ping Liu, Tieli Wang and Chen Chen
In order to improve the efficiency and safety of vertical hydraulic transport systems for non-spherical particles, a new pipeline transport system with a tangential jet inlet is adopted in this study, and a modified non-spherical drag coefficient model i...
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Hanqiao Han, Yun Long and Jinqing Zhong
When we tested the water jet propulsion pump, we found that there were significant vibrations in the pump, especially at small flow points that deviated from the design conditions. The water jet propulsion pump is a mixed-flow pump with guide vane, which...
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Tengyuan Wang, Shuni Zhou, Chang Cai, Xinbao Wang, Zekun Wang, Yuning Zhang, Kezhong Shi, Xiaohui Zhong and Qingan Li
In modern large-scale wind farms, power loss caused by the wake effect is more than 30%, and active yaw control can greatly reduce the influence of the wake effect by deflecting the wind turbine?s wake. The yawed wind turbine?s wake characteristics are c...
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Haiyu Liu, Fangping Tang, Shikai Yan and Daliang Li
The S-shaped hydrofoil is often used in the design of reversible machinery due to its centrally symmetrical camber line. The objective of this paper is to study the influence of cloud cavitation on the flow structure and the unsteady characteristics of l...
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Jing Liu, Zongyu Li, Hanming Huang, Weiwei Lin, Zhilin Sun and Fanjun Chen
In response to the deficiencies in existing bridge pier scour protection technologies, this paper introduces a novel protective device, namely a normal distribution-shaped surface (BND) protection devices formed by rotating a concave normal curve. A thre...
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Qiaoyu Tong and Suxiang Yao
Using ERA-interim Reanalysis data and observational data, the intraseasonal oscillation of the winter rainfall in southern China is studied. The mean square deviation of daily precipitation is used to express precipitation variability, and winter precipi...
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Cundong Xu, Junjiao Tian, Guoxia Wang, Haidong Lian, Rongrong Wang and Xiaomeng Hu
The vortices, backflow, and siltation caused by sediment-laden flow are detrimental to the safe and efficient operation of pumping stations. To explore the effects of water?sediment two-phase flow on the velocity field, vorticity field, and sediment dist...
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Juntong Chen, Man Ge and Lin Li
In order to increase industrial production quality and efficiency, it is essential to understand how the aeration and no-aeration condition affects liquid and solid material mixing in the stirred tank. Due to complicated shear flows, the related mass-tra...
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Yifei Jiang, Weimin Zhang, Huizan Wang and Xiaojiang Zhang
Symmetric instability (SI) is credited with one of the important submesoscale instabilities. However, due to its small scales, it is challenging to capture using current observational measurements and ocean models. Estimates of SI activity are useful for...
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Dawei Bie, Daochun Li, Huadong Li, Zi Kan and Zhan Tu
In this work, we use a three-dimensional computational fluid dynamics (CFD) simulation to comprehend how the two wing arrangement variables, i.e., inner/outer wing proportion and mid-stroke dihedral, affect the lift characteristic of a bat-inspired span ...
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Huachen Pan, Ran Zeng, Xiaoqing Tian, Elias Taalab, Ming Lv and Zefei Zhu
Computational and experimental methods were used to study a propeller coated with hydrophobic material and a propeller with a conventional surface for comparison. In CFD simulations, the blade surface mesh was arranged in a way to set non-slip or free sl...
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Hu Zhang, Jun Wang, Desheng Zhang, Weidong Shi and Jianbo Zang
To understand the effect of cavitation on the tip leakage vortex (TLV), turbulent cavitating flows were numerically investigated using the shear-stress transport (SST) k?? turbulence model and the Zwart?Gerber?Belamri cavitation model. In this work, two ...
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Chunyu Guo, Hang Guo, Jian Hu, Kewei Song, Weipeng Zhang and Wei Wang
The deformation of the cylinder has been proved to greatly reduce the fluctuation of lift and the vortex-induced vibration. In this article, a new form of deformation mode for the smooth cylinder is proposed in order to reduce the vortex-induced vibratio...
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Yingfei Zan, Ruinan Guo, Lihao Yuan and Zhaohui Wu
In underwater towing operations, the drag force and vertical offset angle of towropes are important considerations when choosing and setting up towing equipment. The aim of this paper is to study the variation in drag force, vertical offset angle, resist...
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Benjamin Oyegbile, Guven Akdogan and Mohsen Karimi
In this study, an experimentally validated computational model was developed to investigate the hydrodynamics in a rotor-stator vortex agglomeration reactor RVR having a rotating disc at the centre with two shrouded outer plates. A numerical simulation w...
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Yilin Yang, Meilan Qi, Jinzhao Li and Xiaodong Ma
This study concerns the evolution of flow field and hydrodynamic characteristics within the developing scour hole around a four-pile group with 2 × 2 arrangement. The instantaneous velocities in scour holes at four typical stages during the scouring proc...
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