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管内智能封堵器作为油气管道正常维修作业的主要工具,可在不停输的工况下,通过无线控制系统在管内进行封堵作业。为保证封堵器在进行封堵作业时能够安全平稳的工作,减少管内受阻湍流引起的封堵器卡堵问题的产生,有必要分析管内封堵过程的流场变化规律以及封堵器在封堵过程中的受力情况。利用Fluent软件,基于流体动力学模拟管内封堵器的不同封堵状态,分析得到了不同封堵状态下封堵器周围流场的变化规律及受力情况。比较简化模型与实际模型模拟结果的差异,分析支撑轮的外形轮廓对流场的影响。结果表明:管内封堵器上游压力剧增,流动较平稳,下游产生湍流并伴随着不同尺度的漩涡。研究结果对封堵器的外形设计和封堵作业的安全进行具有一定指导意义。
As a main tool for normal maintenance operation of oil and gas pipelines, the intelligent occlusion device in the pipe can be used for sealing operation in the pipe through the wireless control system under the condition of non-stop transmission. In order to ensure that the occluder can work safely and steadily during the plugging operation and reduce the plugging of the occluder caused by blocked turbulence in the tube, it is necessary to analyze the variation of the flow field in the plugging process of the tube and the effect of the occluder in the sealing The process of blocking the force situation. Fluent software was used to simulate the different occlusion status of the occluder in the tube based on the fluid dynamics. The variation of the flow field around the occluder in different occlusion status and the stress condition were analyzed. The differences between the simplified model and the actual model are compared and the influence of the outline of the support wheel on the flow field is analyzed. The results show that the pressure in the upstream of the occluder increases sharply, the flow is smooth, the turbulence is generated in the downstream, accompanied by vortexes of different scales. The research results have certain guiding significance on the design of occluder and the safety of occluding operation.