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:张洪操 张橙 唐国强[1] 吕林[1] 任珵娇 Zhang Hongcao;Zhang Cheng;Tang Guoqiang;Lyu Lin;Ren Chengjiao(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;School of Marine Science and Engineering,South China University of Technology,Guangzhou 511400,China)
机构地区:[1]大连理工大学海岸和近海工程国家重点实验室,大连116024 [2]华南理工大学海洋科学与工程学院,广州511400
出 处:《水动力学研究与进展(A辑)》2023年第5期692-702,共11页Chinese Journal of Hydrodynamics
摘 要:该文采用二维直接数值模拟方法研究了雷诺数Re=100时,双方柱系统在不同形心间距比(P~*=1.5~5,其中P~*=P/D,P为方柱形心间距,D为方柱边长)和来流攻角(α=0°~90°)条件下的流动同步特性。研究首先基于频谱分析与相位动力学分析了升力系数特征,据此划分双方柱流动的同步模态,并对其尾流场演化特征进行了探讨。随后重点研究了P~*和α参数对同步模态和相位特征的影响规律。研究发现双方柱绕流存在1/1同步、p/p同步(p为大于1的正整数)、p/q同步(q为不等于p的正整数)、准周期和非同步流动模态,其对应的相位特征分别为相位锁定、相位捕获、相位漂移、相位漂移和滑移以及其他状态。结果显示:在α≤35°的区域,流动以1/1同步为主;在α>35°的区域,P~*>2.5时,流动以准周期为主,P~*≤2.5时,流动以非同步为主。Synchronization modes of the flow around two square cylinders with different pitch ratios(P~*=1.5~5.0, where P~*=P/D, P is the centroid spacing of the square cylinder, and D is the side length of the square cylinder) and incidence angle(α=0°~90°) are investigated using two-dimensional direct numerical simulation at Re=100. The characteristics of lift coefficients are analyzed by using spectrum analysis methods and phase dynamics theory, following by a discussion on the identification of flow synchronization and the wake evolution of the square cylinders. The effects of P~* and α on the synchronization modes, phase dynamics and transition patterns are then examined. The 1/1, p/p(p is a positive integer greater than 1) and p/q(q is a positive integer not equal to p)synchronization modes, quasiperiodic mode and desynchronization mode of flows are observed, corresponding to the phase locking,phase trapping, phase drifting, phase drifting and slipping, as well as other states, respectively. When α≤35°, the 1/1 synchronization is the dominant mode in the regime map. When α>35° and P~*>2.5, most of the cases are quasiperiodic modes, while those are mainly characterized by the desynchronization mode when α>35° and P~*≤2.5.
分 类 号:P751[交通运输工程—港口、海岸及近海工程]
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:216.73.216.3