摘要
通过数值模拟等手段开发了一种双级贯流式超低比转速水轮机,利用循环冷却水出口的富余能量推动水轮机转动带动风扇旋转制冷,以达到节能目的。以富余流量0.823m3/s的水轮机为例,以Fluent软件为平台进行计算分析,对双级贯流式超低比转速水轮机的叶片、导叶形式及其安放位置进行了优化,并采用Navier-Stokes方程、SIMPLEC算法对水轮机进行全三维湍流数值模拟,获得了水轮机内部流动细节,预估了水轮机的性能。计算结果表明,优化后的叶片及导叶表现出较高的效率。
In this paper, two-stage tubular turbine with super low specific speed is developed by the method of nu- merical simulation. Redundant energy in outlet of circulation cooling water is used to drive tubular turbine and make the fans rotating for refrigeration, which attains the goal of energy-saving. Taking the turbine with flow rate of 0.82a m3/s for an example, the shape of runner blade, guide vane and its arrangement position are optimized by using Fluent soft ware. At the same time, three-dimensional turbulence numerical simulation of tubular turbine is implemented based on the Navier-Stokes equations and SIMPLEC method. So, the detail of the flow in turbine is obtained and the performance of the turbine is also predicted. The calculation results show that the optimized blade of runner and guide vane have higher efficiency.
出处
《水电能源科学》
北大核心
2013年第11期179-182,共4页
Water Resources and Power
基金
国家自然科学基金资助项目(51076041)
关键词
双级贯流式水轮机
超低比转速
数值模拟
优化设计
two-stage tubular turbine
super low specific speed
numerical simulation
optimization design
