中文摘要：

为使管内智能封堵器在管内更加平稳地运行, 对原封堵器外形进行了改进, 增加了曲形端面结构, 并对改进模型进行了数值模拟计算, 分析其流场分布规律, 结果发现曲形端面结构对流场有一定改善作用.借助正交试验法设计试验方案, 模拟结果显示各组试验模型压力梯度分布有明显差异, 证明端面参数对流场稳定性影响较大, 同时建立端面参数与流场压力梯度绝对平均值之间的数学模型.采用序列二次规划算法对数学模型进行优化, 得到最优参数组合并通过模拟验证, 优化模型相比初始模型有效降低了响应量数值, 其绝对平均值降低约15%.研究结果对封堵器结构外形的设计优化具有指导意义.

英文摘要：

The original structure of the smart plug has been improved by adding curved end face structures to ensure a more steadily movement in the pipe?Numerical simulation of the improved model is conducted and the dis?tribution of flow field is analyzed?The result shows that the curved face structures have a beneficial effect on flow field?Through the test program using the orthogonal experiment, the simulation results show the significant differ?ences of pressure gradient distribution of different models, which proves that the end face parameters have great effects on the stability of flow field?The mathematical model is established for the end face parameters and the abso?lute average pressure gradient, and then is optimized to get the optimal combination of parameters by using sequen?tial quadratic programming method and is verified by simulation?According to the results of numerical simulation, it is found that, compared to the initial model, the optimized model effectively reduced the respond absolute average value by about 15%.