数据驱动的SUBOFF水下航体桨盘面伴流场反演预测

Data-driven inverse prediction of the wake flow at the paddle disk of SUBOFF

  • 摘要:目的】为降低对传统设计经验的依赖,建立一种数据驱动的水下航体尾部桨盘面伴流场通用反演预测方法。【方法】通过坐标仿射将非结构化伴流场转换为维度相同的极坐标速度数据,再利用参数化方法获得尾部伴流场速度的低维表达,同时设置控制点便于直观调控。选用数据驱动的Kriging代理模型反演预测得到与伴流场分布相匹配的去流角与艉舵几何参数。【结果】所提反演预测方法对艉舵轴向位置与去流角参数的反演误差分别为0.051%和0.045%,R2分别为0.9993和0.9983,精度较高。【结论】所发展的尾部伴流场数据驱动反演预测模型为水下航体反设计提供了快速有效的工具。

     

    Abstract: Objectives A generalized data-driven inverse prediction method for the wake flow field at the paddle disk is developed in order to reduce the dependence on traditional design experience. Methods By applying coordinate affine transformation, the unstructured flow field is first converted into polar velocity data with identical dimensions. Thereafter, a parametric approach is employed to derive a low-dimensional representation of the high-dimensional wake flow field. Control points are established to facilitate the intuitive adjustment, and a Kriging surrogate model is selected for inverse learning from the inflow angle and stern rudder geometric parameters to the compressed wake flow field distribution. Results The MAPE of the Inverse Kriging method for the axial position of the stern rudder and the inlet angle are 0.051% and 0.045%, and the R2 are 0.9993 and 0.9983, respectively. Conclusions The proposed method plays as a fast and smart tool for the inverse design of underwater vehicle.

     

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