取排水口附近流场模拟及对通航的影响研究

发布时间：2018-04-10 06:15

本文选题：取排水口　切入点：流场　出处：《大连海事大学》2017年硕士论文

【摘要】：电厂的取排水口的设置,应要求取排水作业后的水流流速尽量低且均匀,对取排水口附近的船舶及配套设施造成尽可能小的影响。但由于地理空间条件的限制,有些电厂、污水处理厂的取排水口设置在了港池内部、泊位附近或航道附近。电厂在进行取排水作业时,船舶在此区域内进行操纵如航道内航行、港区内靠离泊操纵等定会受到影响。为有效评估和规避取排水口附近流场对于船舶通航造成的影响,一定要明确取排水口附近流场的具体情况,进而进行论证分析。本文在了解有关电厂取排水口设置情况和周围通航环境的基础上,结合实际的取排水口现状,选取合适的水动力模型,掌握新型水动力模型MIKE模型的主要方程和求解方法。利用软件构建模拟仿真平台,对取、排水口的取、排水作业进行仿真模拟,并将仿真结果与实测数据进行对比以论证其准确性。最后将通过模拟所得流场数据进行取排水附近流场对通航影响的模拟试验,得出取排水口附近流场对周边泊位通航的具体影响并提出相关建议。本研究通过大范围模型内实际测点数据的对比分析,得出模型结果无论是流速还是流向,与实测值吻合较好,可以用来后续的模拟计算,进一步模拟取排水口附近流场。选取某电站重大件码头进出航道内的特殊点进行分析,得出取排水口附近流场的特点:取排水作业实施前,潮流为典型的近岸往复流,水流较为平顺,在取排水作业后,潮流变化复杂。结合模拟出的流场结果,并综合各种典型船舶和外界环境条件,设计船舶靠离某电站海工工程码头进行模拟试验,从中得出取排水口附近的流场对通航的影响,并提出了船舶操纵、时机选择、拖轮配备和靠泊方式等建议。本文以模拟取排水口附近流场及其对周边泊位通航的影响为目标,在研究取排水作业相关参数的基础上,结合软件模拟、模拟器模拟评估等科研方法,可以较为准确地模拟出取排水口附近流场,进而模拟论证得出取排水口附近流场对船舶通航的影响。本文的研究方法对电站等取排水工程建设的可行性具有参考价值,对取排水口附近的船舶通航安全具有实际指导意义。
[Abstract]:The installation of the drain outlet in the power plant should require the flow velocity to be as low and uniform as possible after the drainage operation, which will have as small an impact on the ship and its supporting facilities as possible in the vicinity of the drain outlet.However, due to the limitation of geographical space, some power plants and sewage treatment plants are located in the port pool, near the berth or near the waterway.When the power plant carries on the drainage operation, the ship manoeuvres in this area, such as the navigation in the channel, and the docking operation in the port area is bound to be affected.In order to effectively evaluate and avoid the influence of the flow field near the drain outlet on the navigation of the ship, it is necessary to make clear the specific situation of the flow field near the drain outlet, and then to carry out the demonstration and analysis.In this paper, on the basis of knowing the setting of intake and drainage outlet and the navigation environment of power plant, combined with the actual situation of drainage outlet, the suitable hydrodynamic model is selected, and the main equation and solution method of the new hydrodynamic model MIKE model are grasped.The software is used to build a simulation platform to simulate the extraction and drainage operation of the drain port. The simulation results are compared with the measured data to prove the accuracy of the platform.Finally, the simulation test of the influence of the flow field near the drainage port on navigation is carried out through the simulated flow field data, and the concrete influence of the flow field near the drainage outlet on the navigation of the surrounding berth is obtained and the relevant suggestions are put forward.Through the comparison and analysis of the actual measured data in the large-scale model, it is concluded that the results of the model, whether the velocity or the direction of flow, are in good agreement with the measured values, and can be used for the subsequent simulation calculation and further simulation of the flow field near the drainage outlet.Selecting the special points in the entrance and exit channel of a major wharf of a power station, the characteristics of the flow field near the drainage outlet are obtained: before the drainage operation is carried out, the tidal current is a typical inshore reciprocating current, and the water flow is relatively smooth, after the drainage operation,The change of tide is complicated.Combined with the simulated flow field results, combined with various typical ships and external environmental conditions, the ship was designed to leave the marine engineering wharf of a power station to carry out simulation tests, and the influence of the flow field near the drainage outlet on navigation was obtained from the simulation test.Some suggestions such as ship handling, timing selection, tugboat arrangement and berthing mode are also put forward.This paper aims at simulating the flow field near the drainage outlet and its influence on the navigation of the surrounding berth. Based on the study of the parameters related to the drainage operation, combined with the software simulation, the simulator simulation evaluation and other scientific research methods,The flow field near the drain outlet can be accurately simulated, and the influence of the flow field near the drain port on the navigation of the ship can be obtained by simulation and demonstration.The research method of this paper is of reference value to the feasibility of drainage works such as power station and has practical guiding significance to the navigation safety of ships near the drainage outlet.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U612;TM62

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