【作者】 陈红勋； 马峥； 张伟； 朱兵； 张睿； 魏群； 张正川； 刘超； 何建武；

【Author】 CHEN Hong-xun;MA Zheng;ZHANG Wei;ZHU Bing;ZHANG Rui;WEI Qun;ZHANG Zheng-chuan;LIU Chao;HE Jian-wu;Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University;Chinese Ship Scientific Research Center;

【机构】 上海大学上海市应用数学和力学研究所； 中国船舶科学研究中心；

【摘要】 水力机械主要包括水轮机和水泵,应用领域涉及航空航天工程、海洋工程、水利水电工程、石油工业、化学工业、采矿工业、生物医学工程、环境工程和农业水土工程等几乎所有的与国计民生密切相关的领域。水力机械内部复杂非稳态流动的机制十分复杂,流动特征可概括为与旋转动力边界(转轮叶片)相互作用下的高雷诺数、多尺度、非均匀、涡旋结构占优的非定常湍流。为兼顾效率和精度,作者及研究团队在分析水力机械内部流动特点的基础上,提出了旋转修正湍流模型、曲率修正的滤波器湍流模型、尺度自适应湍流模型和非线性混合RANS/LES湍流模型,以更加准确地预测水力机械的内部流动,继而预测水力性能和水力动态特性(压力脉动)。在对内部流动分析的基础上,作者提出了相应的流动控制手段,经过实验验证,这些方法可在一定的运行工况范围内显著提高水力机械的水力性能、空化性能和动态特性(抑制了压力脉动和振动)。作者还深入分析了流动控制手段改善水力机械动态特性的机理。希望为提高水力机械的水力性能、抗空化性能和动态特性找到了一条可行的途径。更多还原

【Abstract】 The hydraulic machinery mainly includes hydraulic turbine and pump,which is related to almost all field of the people’s livelihood,such as aerospace engineering,marine engineering,water conservancy and hydropower engineering,petroleum industry,chemical industry,mining industry,biomedical engineering,environmental engineering,and agricultural water-soil engineering.The mechanism of complex unsteady flow in hydraulic machinery is very complex.The flow characteristics can be summarized as unsteady turbulence that interacts with rotating dynamic boundary,and with high Reynolds number,multi-scale,non-uniform and vortex structure dominated.Based on the analysis of the internal flow characteristics of hydraulic machinery,the author and his research team propose a rotating correction turbulence model,a curvature corrected filter-based turbulence model,a scalable detached eddy simulation method and a nonlinear hybrid RANS/LES turbulence model to predict the internal flow of hydraulic machinery more accurately,and then the hydraulic performance and hydraulic dynamic characteristics(pressure pulsation) can be predicted.On the basis of internal flow analysis,author puts forward the corresponding method of flow control.With verification of experiments,these methods can significantly improve the hydraulic performance,cavitation performance and dynamic characteristics of hydraulic machinery in a certain range of operating conditions(the pressure pulsation and vibration are suppressed).The mechanism of flow control to improve the dynamic characteristics of hydraulic machinery is also analyzed in depth,and we hope to find a feasible way to improve hydraulic performance,anti-cavitation performance and dynamic characteristics of hydraulic machinery.更多还原