电厂循环水流道进口水力优化研究

Hydraulic Optimization Research on the Inlet of Circulating Water Channel of Power Plant

为减少占地、节省工程量,某电厂循环水流道初步设计选择平面弯曲、总体长度相对较短的曲线形布置形式。应用二维紊流模型进行数值模拟,分析了流道曲线引水段弯道环流运动所产生的不利影响,为遏制弯道环流运动、调整水流流速分布,对流道进口进行水力优化,将进口前沿冷却塔人字柱支墩改造成导流墩,用以控导引水段水流运动。模型试验表明,该项措施能够有效梳理弯道段水流流向,均化流速分布,控导效果可以满足要求。

In order to reduce the area and save the amount of engineering, tile form of large plane bending and relatively short overall length were taken by preliminary design in cyclical water intake channel of a typical power plant. Two-dimensional turbulent model was used to simulate, and the adverse impact caused by curved helical flow movement in the curved diversion section was analyzed. Optimal design was obtained in the entrance of intake channel for containing the helical flow movement and adjusting velocity distribution. The herringbone column of cooling tower in front of the intake channel entrance was transformed into the diversion pier to control the water flow movement of the pilot section. The model test shows that the measure can effectively dealt with the direction of the water flow in the curved section and equalize velocity distribution, and the con- trol effect can meet the requirements.