检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:刘海军[1,2] 王聪[1] 邹振祝[1] 王本利[1] 王柏秋[1]
机构地区:[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001 [2]河北大学建筑工程学院,河北保定071002
出 处:《哈尔滨工程大学学报》2012年第6期684-689,共6页Journal of Harbin Engineering University
基 金:国家自然科学基金资助项目(10802026)
摘 要:针对圆柱体出筒过程头型对流体动力特性的影响,采用多相流Mixture模型、Singhal空化模型和标准的k-ε湍流模型的方法,并结合动网格技术,求解混合介质RANS方程,实现了圆柱体运动的动边界与流场的流体-固体耦合求解.以此为基础,对有重力影响下的3种头型的圆柱体出筒过程和流体动力特性进行了数值模拟,分析了头型对圆柱体出筒过程中水弹道及其流体动力特性的影响,以及圆柱体压差系数、粘性系数和总力系数变化规律及波动原因.得到模型III出筒过程中流体动力变化较小和水弹道比较稳定的结论,为工程实际应用提供有意义的理论指导.The effects of the head-form on the hydrodynamic characteristics during the launching of underwater vehicles out of a vertical tube were numerically solved by combining the mixture model, Singhal cavitation model, and standard k-ε turbulence model into the Reynolds-averaged Navier-Stokes (RANS) equations under the dynamic mesh system, and the solutions of the interaction of the dynamic boundary conditions of the cylinder and environmental fluid were obtained. The axial symmetric gravity flow field and hydrodynamic characteristics of the underwater cylinder were derived by using numerical simulation. Simulation and analysis results show that different head construction affects the trajectory of the underwater cylinder and hydrodynamic load. The volatility reason of differential pressure coefficients and viscous force coefficients as well as toll force coefficients were derived by analyzing simulation results. Water trajectory and hydrodynamic force of the #3 model are relatively stable in the process of launching from the tube, which may give it various engineering applications.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.200