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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。
By means of numerical simulation and other means, a two-stage tubular turbocharger turbine with ultra-low speed is developed. The surplus energy at the outlet of the circulating cooling water is used to promote the rotation of the turbine to drive the fan to rotate and refrigerate so as to save energy. Taking the turbine with 0.823m3 / s surplus flow as an example, the calculation and analysis based on the Fluent software platform are carried out to optimize the blade and guide vane form of the two-stage cross-flow ultra-low speed turbine and its placement. Navier- Stokes equation and SIMPLEC algorithm for full three-dimensional turbulence numerical simulation of the turbine to obtain details of the internal flow of the turbine to predict the performance of the turbine. The calculation results show that the optimized blades and guide vanes show higher efficiency.