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首页> 外文期刊>Journal of hydraulic research >Movement and collision of Lagrangian particles in hydro-turbine intakes: acasestudy
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Movement and collision of Lagrangian particles in hydro-turbine intakes: acasestudy

机译：拉格朗日粒子在水轮机进气口的运动和碰撞：案例研究

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Studies of the stress/survival of migratory fish during downstream passage through operating hydro-turbines are normally conducted to determine the fish-friendliness of the hydro-turbine units. This study applies a modelling strategy based on flow simulations using computational fluid dynamics and Lagrangian particle tracking to represent the travel of live fish and autonomous sensor devices through hydro-turbine intakes. For the flow field calculation, the simulations were conducted using a Reynolds-averaged Navier-Stokes turbulence model and an eddy-resolving technique. For the particle-tracking calculation, different modelling assumptions for turbulence forcing, mass formulation, buoyancy, and release conditions were tested. The modelling assumptions are evaluated with respect to datasets collected using a laboratory physical model and an autonomous sensor device deployed at Ice Harbor Dam (Snake River, State of Washington, USA) at the same discharge and release point modelled in the present work. We found acceptable agreement between the simulated results and observed data and discuss relevant features of Lagrangian particle movement that are critical in turbine design and in the experimental design of field studies.
机译：通常通过对运行中的水轮机下游通过过程中游动鱼类的压力/存活率进行研究，以确定水轮机单元的鱼类友好性。这项研究应用了基于建模的策略，该建模策略基于使用计算流体动力学和拉格朗日粒子跟踪的流动模拟来代表活鱼和自主传感器设备通过水轮机进气口的行程。对于流场计算，使用雷诺平均Navier-Stokes湍流模型和涡旋求解技术进行了仿真。对于颗粒跟踪计算，测试了湍流强迫，质量配方，浮力和释放条件的不同建模假设。相对于使用实验室物理模型和部署在Ice Harbor大坝（美国华盛顿州，Snake河，美国华盛顿州）的自主传感器设备收集的数据集，对建模假设进行了评估，并在本工作中建模了相同的排放和释放点。我们在模拟结果和观察到的数据之间找到了可接受的一致性，并讨论了拉格朗日粒子运动的相关特征，这些特征对涡轮机设计和现场研究的实验设计至关重要。

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