The effects of geometric shapes at different assembly gaps to achieve the optimal hydrodynamic conditions
文献类型：期刊论文
| 作者 | Zhang, Yao1,2,3; Najafi, Mohammad Javid4; Beni, Mohsen Heydari5; Davar, Ali5; Toghraie, Davood4; Shafiee, Behzad Mojarad6; Jam, Jafar Eskandari5; Hekmatifar, Maboud4 |
| 刊名 | RENEWABLE ENERGY
 |
| 出版日期 | 2022 |
| 卷号 | 184期号:-页码:452 |
| 关键词 | Lattice Boltzmann method Channel-shape And electric-power |
| ISSN号 | 0960-1481 |
| 英文摘要 | In turbines, kinetic energy is transferred to the shaft then converted into a rotational motion to move a generator, so having a good design in the efficiency of turbines is important. Studies show that the efficiency of turbines in the presence of shafts has not been investigated so far. Therefore, our main goal in this study is to investigate the effect of shaft presence on the final efficiency of the hydro turbine. In this paper, the flow of fluid passing through the channels around the sharp leading edge cylinders in a tunnel is simulated using Lattice Boltzmann Method (LBM). Fluid streamlines stability, flow velocity rate, and pressure coefficient in channels with different shapes at assembly gaps of 2, 1.75, and 1.5 m have been investigated. The studied channels are considered in seven Airfoil-like shapes, Reverse Airfoil-like, hyperbola, Triangle, Triple triangle, Hexa triangle, and trapezoidal. The results show that the pressure coefficient in all channels decreases by increasing assembles gaps. On the other hand, reducing the pressure coefficient in the channel leads to cavitation. Cavitation causes erosion at the tip of the hydro turbine blades and reduces the life of the turbine. Therefore, the pressure coefficient is one of the most important parameters that depend on the assembly gap. Finally, the result shows that installing Hyperbola channels with an assembly gap of 1.75 m has the best performance in simulated hydro turbines.(c) 2021 Elsevier Ltd. All rights reserved. |
| 学科主题 | Science & Technology - Other Topics ; Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000773708900004 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35484]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi'an 710123, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 3.Institute of Water Resources and Hydro-electric Engineering, Xi'an University of Technology, Xi'an 710048, China 4.Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran 5.Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology, Tehran, Iran 6.Department of Material Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran |
| 推荐引用方式 GB/T 7714 | Zhang, Yao,Najafi, Mohammad Javid,Beni, Mohsen Heydari,et al. The effects of geometric shapes at different assembly gaps to achieve the optimal hydrodynamic conditions[J]. RENEWABLE ENERGY,2022,184(-):452. |
| APA | Zhang, Yao.,Najafi, Mohammad Javid.,Beni, Mohsen Heydari.,Davar, Ali.,Toghraie, Davood.,...&Hekmatifar, Maboud.(2022).The effects of geometric shapes at different assembly gaps to achieve the optimal hydrodynamic conditions.RENEWABLE ENERGY,184(-),452. |
| MLA | Zhang, Yao,et al."The effects of geometric shapes at different assembly gaps to achieve the optimal hydrodynamic conditions".RENEWABLE ENERGY 184.-(2022):452. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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