基于三维数模礁石航道水流结构分析
发布时间：2019-04-20 15:32
【摘要】：针对长江航道的升级,往来船只航行在具有突嘴、较大礁石碍航河段航行时,往往由于横向宽度不足导致船舶航行安全受到威胁的问题,进行概化礁石斜流水流结构以及船舶受力特点研究。采用CFD软件模拟礁石航道时船舶的水流三维数值模拟方法,得知:流速、礁石占据比越大对水流结构的影响距离越大,且横向流速的影响距离较突出;流速与船舶所受横向力成正比;概化礁石对船舶的纵向影响距离在上下游1倍船长范围之间,最大值约在上游0.5倍船长处。
[Abstract]:In view of the upgrading of the Yangtze River channel, the safety of ships travelling to and from the Yangtze River is often threatened by the lack of transverse width when sailing with a bulging mouth and a larger reef hindering the navigation of the reach of the Yangtze River. The general structure of reef oblique flow and the characteristics of ship force were studied. The CFD software is used to simulate the three-dimensional numerical simulation of the ship's water flow in the reef channel. It is found that the larger the velocity and the larger the reef occupation ratio, the greater the influence distance on the water flow structure, and the influence distance of the transverse velocity is more prominent. The velocity of flow is in direct proportion to the transverse force of the ship, and the longitudinal influence distance of the reef on the ship is between 1 times the length of the ship in the upper and lower reaches, and the maximum value is about 0.5 times the length of the ship in the upper reaches.
【作者单位】： 重庆交通大学水利水运工程教育部重点试验室;重庆交通大学国家内河航道整治工程技术研究中心;
【基金】：“十二五”国家科技支撑计划(2012BAB05B03) 重庆市自然科学基金项目(cstc2011JJA30002) 重庆市教委基金项目(KJ1400319)
【分类号】：U612;U661
本文编号：2461730
[Abstract]:In view of the upgrading of the Yangtze River channel, the safety of ships travelling to and from the Yangtze River is often threatened by the lack of transverse width when sailing with a bulging mouth and a larger reef hindering the navigation of the reach of the Yangtze River. The general structure of reef oblique flow and the characteristics of ship force were studied. The CFD software is used to simulate the three-dimensional numerical simulation of the ship's water flow in the reef channel. It is found that the larger the velocity and the larger the reef occupation ratio, the greater the influence distance on the water flow structure, and the influence distance of the transverse velocity is more prominent. The velocity of flow is in direct proportion to the transverse force of the ship, and the longitudinal influence distance of the reef on the ship is between 1 times the length of the ship in the upper and lower reaches, and the maximum value is about 0.5 times the length of the ship in the upper reaches.
【作者单位】： 重庆交通大学水利水运工程教育部重点试验室;重庆交通大学国家内河航道整治工程技术研究中心;
【基金】：“十二五”国家科技支撑计划(2012BAB05B03) 重庆市自然科学基金项目(cstc2011JJA30002) 重庆市教委基金项目(KJ1400319)
【分类号】：U612;U661
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