Optimization on Structural Parameters of Blade Profile of ?175 mm Turbodrill
The ø175 mm turbodrill was investigated for the effect of structural parameters of blade profiles on the efficiency and torque of the turbodrill.Based on the quintic polynomial theory and the basic principles of com-putational fluid dynamics,a simulation analysis was conducted on the hydraulic performance of the turbodrill.Then,combined with orthogonal test and response surface optimization method,the influences of blade's leading and trailing edge radius,leading and trailing edge wedge angle,and inlet and outlet structural angle on the effi-ciency and torque of turbodrill were identified.By means of range analysis,taking the inlet and outlet structural angle as well as the trailing edge wedge angle as influential factors and the maximization of efficiency and torque as the object,the response surface was optimized.Finally,the response surface method was used to build a regres-sion equation between blade's structural parameters and torque and efficiency,obtaining the working efficiency and torque of the optimized turbodrill.The results show that the main factors affecting efficiency are the outlet structural angle,trailing edge wedge angle and trailing edge radius,and the main factors affecting torque are the outlet struc-tural angle,inlet structural angle and trailing edge wedge angle.The optimized turbodrill has a torque increased by 42.6% and an efficiency increased by 2.4% .The study results provide theoretical support for the parameter design and optimization of the blade profile structure of turbodrill.
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