SIMULATION OF HYDRAULIC TRANSIENTS IN HYDROPOWER SYSTEMS USING THE 1-D-3-D COUPLING APPROACH
SIMULATION OF HYDRAULIC TRANSIENTS IN HYDROPOWER SYSTEMS USING THE 1-D-3-D COUPLING APPROACH
复制标题
使用 1-D-3-D 耦合方法模拟水力系统中的水力瞬变
DOI：
10.1016/s1001-6058(11)60282-5
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发表时间：
2012-09-01
影响因子：
2.5
通讯作者：
Cheng Yong-guang
中科院分区：
文献类型：
--
作者：
Zhang Xiao-xi;Cheng Yong-guang
虽然管道系统中的水力瞬变过程通常采用一维(1-D)方法模拟，但由于水电系统局部区域具有明显的三维流动特征，局部三维(3-D)模拟是必要的。本文将一维方法与三维流体流动模型相结合来模拟水电系统中的多维水力瞬变，提出了两种以正确的波速模拟可压缩水的方法，以及有效耦合一维和三维计算域的两种策略。通过模拟调压室内的水击波和水位波动，并与一维解数据进行比较，验证了该方法的有效性。对由尾水管、尾水调压室和尾水隧洞组成的实际输水系统中的瞬变流动进行了分子动力学研究。结果表明，考虑管网一维水力波动与局部三维流态的相互作用，一维-三维耦合方法是模拟水电系统水力瞬变的一种有效方法，具有广阔的应用前景。
Although the hydraulic transients in pipe systems are usually simulated by using a one-dimensional (1-D) approach, local three-dimensional (3-D) simulations are necessary because of obvious 3-D flow features in some local regions of the hydropower systems. This paper combines the 1-D method with a 3-D fluid flow model to simulate the Multi-Dimensional (MD) hydraulic transients in hydropower systems and proposes two methods for modeling the compressible water with the correct wave speed, and two strategies for efficiently coupling the 1-D and 3-D computational domains. The methods are validated by simulating the water hammer waves and the oscillations of the water level in a surge tank, and comparing the results with the 1-D solution data. An MD study is conducted for the transient flows in a realistic water conveying system that consists of a draft tube, a tailrace surge tank and a tailrace tunnel. It is shown that the 1-D-3-D coupling approach is an efficient and promising way to simulate the hydraulic transients in the hydropower systems in which the interactions between 1-D hydraulic fluctuations of the pipeline systems and the local 3-D flow patterns should be considered.