气垫船承载能力数值计算中部分影响因素探讨  

Some factors affecting lift force of air cushion vehicle in numerical simulation

作　　者：邓锐[1] 任慧龙[1] 刘宁[1] 李陈峰[1] 

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《华中科技大学学报（自然科学版）》2013年第11期97-102,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51209048);中央高校基本科研业务费专项资金资助项目(HEUCF120103)

摘　　要：采用数值模拟的方法,针对一条简单气垫船模型讨论了气体在气道内的流动过程、稳态与非稳态计算方法、网格尺度和计算时间步长等因素对气垫船总升力的影响,建立了适用的计算方案.以此计算方案预报了两条气垫船模型在不同飞升高度下进气量与总升力的关系,提出了确定飞升高度下两条气垫船所需的气流量.研究发现:在仅预报气垫船总升力的情况下可以不考虑气体在气道内的流动过程,而采用非稳态的计算更加接近实际物理情况;同时,当船体表面网格尺度为0.8%船长,计算时间步长为0.001s时,计算结果已经具有较好的精度.船体的进气量与总升力之间呈现出一定的非线性关系,参考此关系得到的气流量在试验中得到了验证.The factors affecting the total lift force calculation of the air cushion vehicle were discussed when a simple air cushion vehicle model was calculated and analyzed. An alternative set of these fac- tors was obtained. The relationship between the air input and the total lift force of two air cushion ve- hicles of different hovering height were obtained by the scheme, and the air flow needed for each vehi- cle of certain hovering height were obtained by the relationship. It is shown that the air flow process in the vehicle can be ignored in the calculation of the total lift force and the model tests. Calculation of non-steady-state closer to the actual physical situation. Meanwhile, the hull surface grid scale is 0.8 captain, calculation time step 0. 001 s, the calculation results already has better accuracy. Hull be- tween total lift into the air and showing a certain non-linear relationship, the reference gas flow to get this relationship has been verified in the test.

关 键 词：气垫船 升力 影响因素 气流量 数值模拟 

分 类 号：U661.39[交通运输工程—船舶及航道工程]