水下航行体空泡非定常发展预示方法研究

Prediction Method on Unsteady Cavity Development of Underwater Vehicle

采用代理模型技术对预示水下垂直发射航行体表面附着空泡的非定常发展过程开展研究。采用独立膨胀原理获取了空泡长度、压力变化的主要影响因素,应用Kriging代理模型方法基于试验数据建立空泡长度特征量和空泡压力特征量的预示模型,典型工况的预示结果与试验数据比对表明两者吻合较好,验证了本方法的准确性。研究了边界条件对空泡非定常特性的影响,获得了不同环境深度、初始速度下空泡长度和泡内压力变化。

Kriging surrogate method is adopted to analyze the unsteady characteristic of cavity development of underwater vehicle vertical launching.The influence factors of cavity length and cavity pressure are investigated based on logvinovich independence principle.Using the experiment data,the surrogate models between effect factors and cavity length also cavity pressure were determined by Kriging approximate method.The prediction results of typical cases agreed well with experiment results,which validates the validity of the prediction method used in cavity development.Also,the influence of initial velocity and initial depth condition on unsteady cavity is researched,and correlative changing law is given.