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首先利用修正模型系数的RNGk-ε湍流模型对轴流转桨式模型水轮机进行了全流道三维非定常湍流计算,经与模型实验结果对比,表明所采用的数值方法和计算结果是准确可靠的.进一步对比分析原型和模型水轮机的计算结果,可以看出原型水轮机压力脉动和模型水轮机压力脉动具有相同的传播规律,但是幅值并不存在相似关系.考虑机组的实际运行状态,在最后部分给出了在考虑转轮流固耦合效应影响下,预估的原型轴流转浆式水轮机压力脉动结果.通过与未考虑流固耦合效应影响的计算结果对比,发现叶片的弹性变形对于水轮机压力脉动的频率和振幅都有降低作用.
Firstly, the three-dimensional full-channel unsteady turbulent turbulence model is calculated by RNGk-ε turbulence model with modified model coefficients. Comparing with the experimental results, it is shown that the numerical method and the calculation result are accurate and reliable Comparing the calculation results of prototype and model turbine, it can be seen that the pressure fluctuations of prototype turbine and model turbine have the same propagation rule, but the amplitude does not have a similar relationship.Considering the actual operation of the unit, in the final part, The results of the pressure pulsation of the prototype axial-flow slurry turbine under the influence of the fluid-solid coupling effect of the rotor are deduced. Comparing with the calculation results without considering the effect of the fluid-solid coupling effect, it is found that the elastic deformation of the blade is significant to the pressure pulsation of the turbine Both the frequency and the amplitude decrease.