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束流理论设计的涡轮钻具叶栅叶片,往往达不到预期的性能指标。采用实体建模、CFD前置处理器等工具真实、准确地建立涡轮定、转子的单周期跨叶片流道计算模型,对其内流场进行CFD仿真模拟。根据速度场分布情况进行叶型优化,同时模拟出优化设计后的涡轮在不同转速下的输出特性,并与实验数据进行对比,证明了应用CFD技术对涡轮钻具叶栅内流场模拟分析的有效性、准确性,为涡轮钻具水力性能预测、叶栅结构优化提供了一种有力技术手段。
Beam turbine blade design cascades theory, often fail to achieve the desired performance. The calculation model of turbine stator and rotor single-cycle cross-blade runner was established accurately and accurately by using the methods of solid modeling and CFD preprocessor, and the CFD simulation of its internal flow field was carried out. According to the distribution of the velocity field, the optimization of the blade type is carried out, and the output characteristics of the optimized turbine at different rotational speeds are simulated. Compared with the experimental data, it is proved that the CFD technique can simulate the flow field in the turbine cascade. The validity and accuracy of this method provide a powerful technical method for the prediction of hydraulic performance of turbine drilling tools and the optimization of cascades structure.