Influence of structural parameters of thermal energy generator on performance
MO Li1*, LIU Yunhong1, MA Zheng2
1. College of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China; 2. Petro China Southwest Oil & Gasfleld Company of PetroChina Company Limited, Chongqing 401120, China
Abstract：The straight blade with equal thickness was turned into the blade of NACA airfoil to improve the hydraulic performance of the thermal energy generator. The numerical simulation method was used to analyze the variation of the turbulent energy dissipation rate and torque of blades with different profiles when the thermal energy generator at different rotational speeds, blade inclination angles and blade numbers. Several mathematical models of different blade structures, blade numbers and blade inclination angles were established. The results show that the turbulent energy dissipation rate and torque of the thermal energy generator with NACA airfoil blade are greater than that of straight blades with equal thickness at different speeds, blade inclination angles and blade numbers, which can reduce the deviation of the flow angle generated by the liquid flow in the working chamber of the thermal energy generator. With the increase of rotating speed, the torque difference between NACA airfoil and straight blade increases gradually, and the liquid flow deviation loss further decreases. The turbulent energy dissipation rate of NACA6412 airfoil with relative larger curvature is the biggest, and the liquid flow is more intense. The torque value of the thermal energy generator with blade of NACA6412 at the high rotational speed of 3 000 r/min is 39.2% larger than that of the straight blade. When the inclination angles of blade increases from 35° to 65°, the torque value of the thermal energy generator with blade of NACA0012 and NACA2412 airfoils gradually decreases. The torque value of the thermal energy generator with blade of NACA4412 and NACA6412 airfoils first increases and then decreases. The optimal combination of blade numbers is different for different blade profiles.
莫丽*,刘芸宏,马筝. 热能发生器叶型优化及性能[J]. 排灌机械工程学报, 2021, 39(9): 871-876.
MO Li*,LIU Yunhong,MA Zheng. Influence of structural parameters of thermal energy generator on performance. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(9): 871-876.
