DOE方法在螺旋桨几何参数优选中的应用

Application of DOE in Optimization of Geometric Parameters of the Propeller

螺旋桨的几何外形是通过螺距、纵倾、侧斜、拱度、弦长、桨叶剖面等几何参数来表达的,这些几何参数影响着整个螺旋桨的水动力、噪声、空泡、振动等性能。定量地给出不同半径处各个几何参数对螺旋桨性能的影响,对螺旋桨的设计有重要的指导意义。论文采用试验设计(Design of Experiment,DOE)的拉丁超立方设计方法,结合螺旋桨定常水动力性能的面元理论预报程序,分别定量地研究了不同半径处的螺距以及盘面比与0.4、0.7、1.0半径处的纵倾、螺距、侧斜对敞水螺旋桨推力系数和敞水效率的影响;同时,结合螺旋桨非定常水动力性能的面元理论预报程序及傅里叶分析方法,定量研究了不同半径处侧斜以及0.5、0.8、1.0半径处的螺距、纵倾、侧斜对螺旋桨主桨叶在给定伴流场中非定常推力的影响。研究结果表明:DOE方法能够准确分析不同径向处的几何参数对定常和非定常螺旋桨性能的影响程度。

The geometry of a propeller can be expressed with the parameters such as pitch, rake, skew, chord length, and blade section, affecting hydrodynamic performance, noise, cavitations, vibration, and so on. Using LHD（Latin Hypercube Design） method for designing experiment and panel- method for predicting steady performance, the influences of the pitch, area ratio, rake, and skew at different radius on the open water efficiency and trust coefficient are quantitatively studied. In addition, using LHD method and panel-method for predicting unsteady performance and FFT method, the influences of the skew, pitch, rake and at different radius on the unsteady thrust are quantitatively studied.