双叶片半转叶轮水轮机水动力性能实验研究

王孝义; 李磊; 孙承坤; 于晓峰; 刘聪; 张玉华

doi:10.13433/j.cnki.1003-8728.20200499

双叶片半转叶轮水轮机水动力性能实验研究

doi: 10.13433/j.cnki.1003-8728.20200499

安徽工业大学机械工程学院, 安徽马鞍山 243002

基金项目:

国家自然科学基金项目 51375014

安徽省重点研究与开发计划项目 201904b11020030

详细信息

作者简介:
王孝义(1970-), 教授, 博士, 研究方向为仿生机械、数字化设计与制造, wangxy@ahut.edu.cn

中图分类号: TK73
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- 文章访问数: 106
- HTML全文浏览量: 66
- PDF下载量: 22
- 被引次数: 0
出版历程
- 收稿日期: 2020-12-16
- 刊出日期: 2022-10-25

Experimental investigation of Hydrodynamic Performance of Tidal Turbine with Double-blade and Half-rotating Impeller

School of Mechanical Engineering, Anhui University of Technology, Ma'anshan 243002, Anhui, China

摘要

摘要: 双叶片半转叶轮水轮机是一种升阻复合新型垂直轴水轮机, 水动力性能优劣直接影响着其工程应用价值。本文首先介绍了双叶片半转叶轮水轮机工作原理, 分析了主要性能参数与实验参数的关系; 在水轮机样机制造和水下实验平台设计的基础上, 开展了水轮机低速启动性能测试、不同流速下获能效率测试以及获能效率稳定性测试等水下实验项目, 并将水下实验与数值模拟进行结果对比分析。实验结果表明: 双叶片半转叶轮水轮机在低流速(0.5 m/s)下依然保持良好的启动特性, 来流速度对水轮机获能效率影响较小, 最佳负载下水轮机平均获能效率可达46%, 明显高于传统垂直轴水轮机获能效率; 提高能量输出稳定性是该水轮机设计研究下一步需要努力的方向。
- 半转叶轮 /
- 水轮机 /
- 水下实验 /
- 水动力性能 /
- 获能效率
Abstract: Double-blade half-rotating impeller tidal turbine (DHITT) is a new kind of lift-drag composite vertical tidal turbine. Hydrodynamic performance had a direct impact on its engineering application for DHITT. The working principle of DHITT was firstly introduced, and the relationship between the main performance parameters and the experimental parameters of DHITT was analyzed. Based on DHITT prototype and experiment platform, the underwater experiment schemes, including low income flow velocity start-up performance test, coefficient of energy extraction test and coefficient of energy extraction stability test at different income flow velocity had been carried out, and the relationship between the simulation results and the experimental was contrastively analyzed. The experimental results showed that DHITT maintained a good start-up characteristic at low income flow velocity (0.5 m/s), and the income flow velocity had slight influence on the coefficient of energy extraction of DHITT. The average coefficient of energy extraction of DHITT under optimal load can be nearly 46%, which was significantly higher than that of those traditional vertical turbines. The next research direction of DHITT is to improve the stability of the energy output.
- half-rotating impeller /
- tidal turbine /
- underwater experiment /
- hydrodynamic performance /
- coefficient of energy extraction

HTML全文

图 1 半转机构运行原理

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图 2 水轮机结构及其工作原理

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图 3 水轮机实验样机

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图 4 水轮机实验测试平台示意图

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图 5 实验平台俯仰运动分析模型

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图 6 水下实验现场图

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图 7 启动过程转速变化规律

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图 8 获能效率随负载变化规律

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图 9 实验-数值模拟对比

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图 10 水轮机获能效率变化规律

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表 1 0.50 m/s来流速度下水轮机运行状态

负载转矩/ Nm	转速/ (r·s^-1)	来流速度/ (m·s^-1)	输出功率/W	获能效率/%
0.028	0.730	0.509	0.127	0.8
0.424	0.661	0.494	1.761	11.4
0.753	0.674	0.512	3.187	18.5
0.935	0.630	0.504	3.701	22.5
1.135	0.622	0.506	4.433	26.7
1.342	0.591	0.495	4.983	32.0
1.590	0.548	0.480	5.474	38.6
1.955	0.521	0.490	6.392	42.4
2.312	0.469	0.500	6.808	42.3
2.556	0.496	0.513	7.962	46.1
2.837	0.379	0.503	6.743	41.4
3.097	0.169	0.480	3.285	23.2
3.200	0.000	0.497	-	-

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表 2 0.75 m/s来流速度下水轮机运行状态

负载转矩/ Nm	转速/ (r·s^-1)	来流速度/ (m·s^-1)	输出功率/W	获能效率/%
0.161	0.963	0.707	0.974	2.1
0.167	0.985	0.712	1.033	2.2
0.172	0.982	0.702	1.064	2.4
0.227	0.991	0.724	1.414	2.9
1.915	0.881	0.734	10.602	20.9
3.864	0.823	0.699	19.981	45.7
3.869	0.810	0.708	19.699	43.4
4.826	0.790	0.750	23.946	44.3
6.616	0.589	0.743	24.467	46.6
7.018	0.543	0.770	23.910	40.9
7.147	0.530	0.771	23.791	40.6
7.265	0.465	0.766	21.215	36.9
7.500	0.000	0.770	-	-

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表 3 1.00 m/s来流速度下水轮机运行状态

负载转矩/ Nm	转速/ (r·s^-1)	来流速度/ (m·s^-1)	输出功率/W	获能效率/%
0.626	1.281	0.970	5.041	4.3
1.914	1.164	1.000	13.995	10.9
3.692	1.085	0.957	25.157	22.4
4.695	1.073	0.931	31.637	30.6
5.744	1.003	0.913	36.181	37.1
6.703	0.930	0.918	39.148	39.5
7.505	0.852	0.876	40.156	46.6
7.880	1.035	0.997	51.218	40.4
8.169	0.917	0.988	47.043	38.1
9.100	0.558	0.867	31.889	38.2
9.577	0.676	0.954	40.657	36.6
10.370	0.433	0.978	28.199	23.6
10.600	0.000	0.985	-	-

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