Structural stress analysis of rotor system of high-temperature molten- salt pump based on flow-thermal-structure coupling
ZHU Rongsheng1, CHEN Yiming1*, AN Ce1, KANG Junjun1, LONG Yun1, GE Jie2
1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Shimge Pump Industry Group Co. Ltd., Wenling, Zhejiang 317500, China
Abstract：The structural stress analysis in the rotator system of a high-temperature molten-salt pump is carried out based on ANSYS Workbench. At first, computational fluid dynamics software CFX is used to calculate the steady turbulent flows in the pump under multiple working condition, and the predicted results are validated with experimental data.By comprehensively considering the hydrodynamic, centri-fugal and thermal loads in the high-temperature molten-salt pump, a flow-thermal-structure coupling dynamic model is established for the rotor system.Based on the model, the influence of material property and temperature on the structural performance of the pump is investigated, and the structural stress analysis in the rotor system components is conducted. The results show that under the same flow condition the maximum deformation of impeller blades in different materials shows a first increasing and then decreasing trend with increasing temperature. Moreover, the impeller deformation keeps constant basically and is less affected by flow rate.The stress level on the blade pressure side is higher than that on the blade suction side, and the stress value on the blade suction side in different materials exhibits a linearly decreasing trend at various temperatures.The position with the highest equivalent stress is mainly concentrated in the areas where the blades are in contact with the shroud and hub near the impeller outlet. Based on the comprehensive analysis on impeller deformation and strength, the impeller with stainless steel 316L is the best solid mechanics performance compared with that in stainless steels 347 and 420. This study can provide some reference for the structural design of high-temperature molten-salt pumps.
朱荣生,陈一鸣*,安策,康俊鋆,龙云,葛杰. 基于流热固耦合的高温熔盐泵转动系统结构应力分析[J]. 排灌机械工程学报, 2021, 39(3): 238-243.
ZHU Rongsheng,CHEN Yiming*,AN Ce,KANG Junjun,LONG Yun,GE Jie. Structural stress analysis of rotor system of high-temperature molten- salt pump based on flow-thermal-structure coupling. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(3): 238-243.
