考虑流动分离的有限宽楔形剖面匀速入水受力分析

摘要

Based on Modified Logvinovich Model (MLM), the constant velocity water entry force of finite width wedge-shaped sections is investigated. By introducing fictitious body surface, the influence of flow separation from knuckles is simulated. The computation formulas of the vertical entry force before and after the chine immersion is presented. The results are compared with the fully nonlinear numerical simulation results and experimental data. It is shown that the proposed extended MLM method is a relatively simple and effective method, and can be extended to some engineering applications.%　　文章基于MLM砰击模型（Modified Logvinovich Model）研究有限宽度楔形剖面匀速入水受力问题。当流动在折角处分离后，通过引入虚拟物面扩展MLM计算方法适用范围，使其可以考虑流动分离对剖面受力的影响。并计算了垂向水动力在流动分离前、后随时间的变化。将结果与非线性数值解、试验值进行比较表明：这是一种相对简单且计算快速的有效方法，易于工程实际应用。