涡轮钻具叶片型线设计及流场模拟分析研究

Study on Turbine Blade of Turbodrill Design and Simulation of Flow Field

摘要:

涡轮叶片的型线设计对涡轮钻具的性能影响很大。以外径为127 mm地质钻探用涡轮钻具为例，采用五次多项式来设计涡轮叶片的型线，使用SOLIDWORKS三维造型软件绘制了涡轮叶片的三维模型，并导入ANSYS FLOTRAN CFD模块，对不同粘度下的涡轮叶片的水力性能进行了分析，获得了较为直观的速度场和压力场分布状况。结果证明，通过CFD分析，可以很好地将叶片型线的缺陷和不同状态下的涡轮钻具水力性能展现出来，对涡轮叶片的水力性能预测具有指导作用。

Abstract:

The shape of turbine blade has great impact on the performance of turbodrills. Take the example of turbodrill with diameter of 127 mm for geological drill; it is proposed to determine the configuration of the blade by quintic polynomial. Solidworks 3D modeling software was used in drawing three-dimensional model of the turbine blades. ANSYS FLOTRAN CFD was imported into the model, and hydraulic performances of the turbine blades under different viscosity were analyzed. From this simulation, abundant data of internal flow field have been obtained. Under CFD analysis, it confirms that the defects and hydraulic performance of turbodrill under different conditions are well demonstrated, which has guiding role for prediction of blade hydraulic performance.