Analysis of Cavitation Performance of a 2-D Hydrofoil Based on Mixed-iterative Method

以便学习一只 2-D 水翼船的成穴特征，联合非线性的成穴模型和混合重复的方法被用来预言并且分析水翼船的成穴表演。成穴元素非线性地基于格林公式和不安潜力面板方法被处理。同时，联合洞形状为的方法修理了重复和洞塑造的洞长度(CSCL ) 因为固定成穴数字(CSCN ) 重复被用来得出水翼船成穴的厚度和长度。通过计算结果的分析，成穴什么时候发生在水翼船上，能被结束压力和速度的 jump 潜在地在吸表面上在成穴结束区域和非成穴区域之间存在。在攻击的某些角度，成穴数字在成穴的长度上有否定影响。并且在攻击和成穴的一样的角度下面数，越大水翼船的厚度，越 shorter 成穴长度。

In order to study cavitation characteristics of a 2-D hydrofoil, the method that combines nonlinear cavitation model and mixed-iteration is used to predict and analyze the cavitation performance of hydrofoils. The cavitation elements are nonlinearly disposed based on the Green formula and perturbation potential panel method. At the same time, the method that combines cavity shape for fixed cavity length （CSCL） iteration and cavity shape for fixed cavitation number （CSCN） iteration is used to work out the thickness and length of hydrofoil cavitations. Through analysis of calculation results, it can be concluded that the jump of pressure and velocity potentially exist between cavitation end area and non-cavitations area on suction surface when cavitation occurs on hydrofoil. In certain angles of attack, the cavitation number has a negative impact on the length of cavitations. And under the same angle of attack and cavitation number, the bigger the thickness of the hydrofoil, the shorter the cavitations length.