带插管的水平轴流涡轮叶片截面性能分析

P. Kundu, A. De
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引用次数: 0

摘要

每年从河流和潮汐中产生更多可用的电力对于提高成本效益至关重要。在各种备选方案中,本文考虑了叶片箔的性能改进。当叶片表面的流体失去动能时,就会发生流动分离。升力由于气流分离而降低,最终导致水平轴电流涡轮产生的功率减少。为了提取更多的能量,必须克服这种流动分离。本文结合某型水平轴流透平的实际应用,提出了一种在叶片截面上设置定时管以提高其性能的被动流动控制方法。通过分析特定攻角下的力系数、滑行比和失速角来确定进气道和出气口位置。最后,比较了基线和改进后的水翼的性能特征。水翼的最大升力系数提高15.7%。此外,最大滑翔比大大增加超过失速基线剖面。数值计算结果表明,在较大迎角时,在水翼上按一定间隔插入管可以显著提高水翼的性能。
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Performance analysis of a horizontal axis current turbine blade section with inserted tube
Generating more usable power annually from the river and tidal currents is essential to improving cost-effectiveness. Among various alternative options, the performance improvement of the blade foil has been considered in this work. When the fluid over the blade surface loses kinetic energy, flow separation occurs. The lift forces are reduced by flow separation, which finally results in less power production by the horizontal axis current turbine. To extract more power, it is necessary to overcome this flow separation. This paper presents a passive flow control method using tubes at regular intervals on the blade section to improve its performance considering its application on a horizontal axis current turbine. The tube inlet and outlet positions are determined by analyzing the force coefficients, glide ratio, and stall angle for a specific angle of attack. Finally, the performance characteristics are compared between the baseline and the modified hydrofoil. The maximum lift coefficient of the hydrofoil is increased by 15.7%. Also, the maximum glide ratios are considerably increased beyond the stall of the baseline profile. From the numerical results, it can be concluded that tubes inserted at regular intervals on the hydrofoil significantly increase its performance at a higher angle of attack.
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来源期刊
CiteScore
3.90
自引率
11.10%
发文量
77
审稿时长
>12 weeks
期刊介绍: The Journal of Engineering for the Maritime Environment is concerned with the design, production and operation of engineering artefacts for the maritime environment. The journal straddles the traditional boundaries of naval architecture, marine engineering, offshore/ocean engineering, coastal engineering and port engineering.
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