回转体局部空化流场数值模拟的一种改进算法

An Improved Algorithm of Numerical Simulation of Partially Cavitation Flow around Axisymmetric Body

改进了一种基于势流的回转体局部空化流场数值模拟算法,使之能够适用更大的空化效范围,更广泛的空化器类型。提出一种确定空泡光滑脱体点位置的迭代方案,使得算法能够自动寻找光滑分离点的位置.针对有台阶的空化器类型,提出一种初始空泡位置的确定方法,使得算法能够使用于这种类型空化器局部空泡的计算。最后,进行了水洞实验对算法进行了实验验证,结果表明该算法所确定的空泡外形与实验结果吻合很好。

By improving a potential based algorithm of numerical simulation of partially-cavitation flow around axisym- metric body,a new algorithm which can work on wider cavitation number range and more cavitator types was presen- ted.By analyzing the process of cavity separation,a iterating scheme was design to track the cavity separation point au- tomatically.In order to extend the simulation to cavitator with step,a method to determine the initial value of cavity boundary was given.Finally,water tunnel tests were carried to validation the present algorithm,which indicate that the simulation results accorded well with experiment results.