| 引用本文: | 孙科,张亮,何环宇.三叶片垂直轴水轮机自启动性能数值计算[J].哈尔滨工业大学学报,2016,48(4):144.DOI:10.11918/j.issn.0367-6234.2016.04.024 |
| SUN Ke,ZHANG Liang,HE Huanyu.Numerical computation on self-starting position of a three-blade vertical axis hydro-turbine[J].Journal of Harbin Institute of Technology,2016,48(4):144.DOI:10.11918/j.issn.0367-6234.2016.04.024 |
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| 摘要: |
| 为寻求固定偏角垂直轴水轮机的启动性能规律，应用CFX流体-刚体耦合运动求解方法实现了垂直轴潮流能水轮机自启动过程的瞬态数值模拟，结合静态启动力矩系数的计算结果，分析在不同初始方位角下水轮机的启动时间以及角速度的稳定情况.研究结果表明：对于三叶片固定偏角垂直轴水轮机而言，方位角在60°~130°范围内启动性能较好，但在90°位置静态力矩会出现突降，不利于自启动；方位角在140°~170°范围内启动性能较差，但系统阻尼为0时，在所有位置均能够实现自启动，且启动过程稳定后水轮机转速均达到飞逸转速.
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| 关键词: 潮流能 垂直轴水轮机 启动位置 自启动性能 方位角 系统阻尼 |
| DOI：10.11918/j.issn.0367-6234.2016.04.024 |
| 分类号:O352 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51209060); 高等学校博士学科点专项科研基金(20122304120035). |
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| Numerical computation on self-starting position of a three-blade vertical axis hydro-turbine |
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SUN Ke,ZHANG Liang,HE Huanyu
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（College of Shipbuilding Engineering, Harbin Engineering University,150001 Harbin, China）
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| Abstract: |
| For studying on start-up performance rules of fixed pitch tidal current turbine, the transient self-starting process of vertical axis hydro-turbine is numerical simulated by using CFX fluid-rigid body coupled motion calculating method. Combining static start-up torque coefficient results, the self-starting time and the angular speed stability of the turbine are analyzed in different initial azimuth angles. It is shown that, as for the three-blade fixed-pitch vertical axis hydro-turbine, the turbine has a better self-starting performance at azimuth angles of 60°~130°, but the angle of 90°is not a good choice because the static start-up torque will drop suddenly at this point. The turbine has a worse self-starting performance at azimuth angles of 140°~170°. However, the three-blade vertical axis hydro-turbine has self-starting performance at any initial position when the system damping is zero and the angular speed of the main shaft can arrive at runaway speed finally.
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| Key words: tidal current energy vertical axis hydro-turbine start-up position self-starting performance azimuth angle system damping |
