基于Bezier和正交试验的涡轮叶片参数优化设计

涡轮的叶片型线在涡轮钻具设计中处于核心地位,对其进行优化设计具有重要的意义。基于Bezier曲线对涡轮叶片型线的表达式进行推导。以ø127 mm涡轮为例,应用计算流体力学软件Fluent对其进行数值模拟,并结合正交试验方法,以叶片形状控制参数为因素,以涡轮的转矩和效率为指标,对叶片型线进行优化。结果表明,此方法可综合考虑转矩和效率,得到水力性能优秀的叶片型线参数,为涡轮钻具的叶片设计和优化提供指导。

Optimization Design of Turbine Blade Parameters Based on Bezier and Orthogonal Test

Turbine blade profile is at the core position in the design of turbodrill, and it is of great significance to optimize its design. The expression of turbine blade profile based on Bezier curve was deduced. The turbodrill with diameter of 127 mm was taken for an example, and the computational fluid dynamics software(Fluent)was used to simulate it. At the same time, the orthogonal test method was combined. Taking the blade shape control parameters as factors, and using the torque and efficiency of the turbine as targets, the blade profile was optimized. The results show that the torque and efficiency can be considered synthetically in this method to get the blade profile with excellent hydraulic performance. The research can provide guidance for the design and optimization of turbodrill blades in the future.