复杂长管路阻塞特性的评估方法与检测技术
发布时间：2019-03-21 09:28
【摘要】：随着现代管路传输技术和气动技术的发展，复杂长管路在日常生产生活中变得愈发重要，而管路发生阻塞则会造成大量经济损失甚至引发安全事故。然而现有的复杂长管路阻塞检测技术存在诸多缺陷，无法满足其阻塞检测的需求，因此研究复杂长管路阻塞流量特性的评估方法和检测技术具有极强的现实意义。本文针对复杂长管路中阻塞的流量特性进行了深入研究，提出基于瞬态流法的阻塞检测技术。具体内容如下： （1）采用理论分析及仿真模拟的方式研究了管道壅塞流特性。理论分析了等管径管道和变管径管道管尾处在壅塞流下的速度特性，，并评估了管道壅塞流产生条件；采用仿真模拟的方式验证了理论分析的结论，并总结出壅塞流下管道阻塞的流量特性。 （2）仿真分析了阻塞管路空气流动规律并建立了管路阻塞流量模型。通过FLUENT软件平台对阻塞流量影响因素进行了仿真模拟，探索各阻塞流量影响因素对管道流量的影响，并在此基础上利用大量仿真数据建立阻塞流量模型。 （3）建立了基于特征线法的复杂长管路阻塞检测方法和复杂长管路阻塞检测模型。利用管道内瞬态流的基本规律，推导出连续性偏微分方程与运动偏微分方程；利用特征线法求解偏微分方程组推导出管道内部各节点压力、流量迭代方程，建立在定容放气的环境下建立阻塞前后端的压力、流量递推模型，结合阻塞流量模型及壅塞流特性计算出管道阻塞的开孔面积，并最终建立了基于特征线法的复杂长管路阻塞检测方法。 （4）设计了阻塞检测设备并验证基于特征线法的阻塞检测模型的有效性。设计基于定容放气的复杂长管路阻塞检测设备，使用此设备验证特征线法建立的管道阻塞检测模型；通过实验的方式证明基于定容放气特征线法的复杂长管路阻塞检测方法具有较高的检测精度。 本文的研究成果对于复杂长管路的阻塞检测具有重大的现实意义，采用定容放气特征线法为瞬态流法在此类特殊管道的应用起到了较大的示范作用。
[Abstract]:With the development of the modern pipeline transmission technology and the pneumatic technology, the complex long pipeline becomes more and more important in daily production and life, and the blockage of the pipeline can cause a large amount of economic loss and even cause safety accidents. However, the existing complex long pipeline blocking detection technology has many defects, and can not meet the requirement of the blocking detection, therefore, the method and the detection technology for evaluating the flow characteristics of the complex long pipeline are of great practical significance. In this paper, the flow characteristics of the block in the complex long pipeline are studied deeply, and the blocking detection technology based on the transient flow method is put forward. The specific contents are as follows: (1) The method of theoretical analysis and simulation is used to study the flow of the pipeline. Based on the theory, the velocity characteristics of the pipe tail of the pipe and the pipe with variable diameter are analyzed, and the conditions of the flow of the plug flow of the pipe are evaluated. The conclusions of the theoretical analysis are verified by means of simulation and the flow of the blocking of the pipe of the pipe is summarized. (2) The air flow rule of the blocking pipeline is analyzed and the pipeline blocking flow is established. In this paper, the influence factors on the flow of the pipeline are simulated by the FLUENT software platform, and the influence of the influencing factors on the flow of the pipeline is explored, and a large amount of simulation data is used to establish the blocking flow. (3) The method of complex long pipeline blockage detection based on the characteristic line method and the complex long pipeline resistance are established. The continuity partial differential equation and the motion partial differential equation are derived by using the basic law of the transient flow in the pipeline, the pressure of each node in the pipeline and the flow iteration equation are derived by using the characteristic line method, The pressure of the back end, the flow recursive model, the blocking flow model and the plug flow characteristic are combined to calculate the opening area of the pipe block, and the complex long pipeline resistance based on the characteristic line method is finally established. Plug detection method. (4) The blocking detection equipment is designed and the blockage detection based on the characteristic line method is verified The effectiveness of the model is measured. A complex long pipeline blocking detection device based on constant volume deflation is designed, and the pipeline blocking detection model established by the characteristic line method is verified by using the device. The method for detecting the complex long pipeline blockage based on the constant-volume deflating characteristic line method has the advantages that the method for detecting the complex long pipeline blockage based on the constant-volume deflating characteristic line method The results of this paper are of great practical significance for the detection of the blockage of complex long pipeline, and the method of constant-volume deflating characteristic line is used to apply the transient flow method to the application of such special pipes.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U171
本文编号：2444808
[Abstract]:With the development of the modern pipeline transmission technology and the pneumatic technology, the complex long pipeline becomes more and more important in daily production and life, and the blockage of the pipeline can cause a large amount of economic loss and even cause safety accidents. However, the existing complex long pipeline blocking detection technology has many defects, and can not meet the requirement of the blocking detection, therefore, the method and the detection technology for evaluating the flow characteristics of the complex long pipeline are of great practical significance. In this paper, the flow characteristics of the block in the complex long pipeline are studied deeply, and the blocking detection technology based on the transient flow method is put forward. The specific contents are as follows: (1) The method of theoretical analysis and simulation is used to study the flow of the pipeline. Based on the theory, the velocity characteristics of the pipe tail of the pipe and the pipe with variable diameter are analyzed, and the conditions of the flow of the plug flow of the pipe are evaluated. The conclusions of the theoretical analysis are verified by means of simulation and the flow of the blocking of the pipe of the pipe is summarized. (2) The air flow rule of the blocking pipeline is analyzed and the pipeline blocking flow is established. In this paper, the influence factors on the flow of the pipeline are simulated by the FLUENT software platform, and the influence of the influencing factors on the flow of the pipeline is explored, and a large amount of simulation data is used to establish the blocking flow. (3) The method of complex long pipeline blockage detection based on the characteristic line method and the complex long pipeline resistance are established. The continuity partial differential equation and the motion partial differential equation are derived by using the basic law of the transient flow in the pipeline, the pressure of each node in the pipeline and the flow iteration equation are derived by using the characteristic line method, The pressure of the back end, the flow recursive model, the blocking flow model and the plug flow characteristic are combined to calculate the opening area of the pipe block, and the complex long pipeline resistance based on the characteristic line method is finally established. Plug detection method. (4) The blocking detection equipment is designed and the blockage detection based on the characteristic line method is verified The effectiveness of the model is measured. A complex long pipeline blocking detection device based on constant volume deflation is designed, and the pipeline blocking detection model established by the characteristic line method is verified by using the device. The method for detecting the complex long pipeline blockage based on the constant-volume deflating characteristic line method has the advantages that the method for detecting the complex long pipeline blockage based on the constant-volume deflating characteristic line method The results of this paper are of great practical significance for the detection of the blockage of complex long pipeline, and the method of constant-volume deflating characteristic line is used to apply the transient flow method to the application of such special pipes.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U171
【参考文献】
相关期刊论文 前10条
1 李长俊,汪玉春,王元春;输气管道系统仿真技术发展状况[J];管道技术与设备;1999年05期
2 张庆杰;陈宝忠;王玉琴;;输油管道冰堵监测与定位技术的研究[J];管道技术与设备;2005年06期
3 曹睿;刘艳升;;垂直锐边孔口的自由出流特性(Ⅲ)孔几何形状对孔流系数的影响[J];化工学报;2009年05期
4 贾志刚;陈志英;;基于参数化的航空发动机管路调频方法研究[J];航空发动机;2008年04期
5 李长俊;;天然气在管道内的不稳定流动分析[J];天然气工业;1992年04期
6 艾尔肯·阿不列木;买买提热夏提·买买提;丁杰;王世亨;;用γ射线Compton散射法来测定管道内油垢厚度(英文)[J];新疆大学学报(自然科学版);2009年02期
7 刘恩斌;李长俊;廖柯熹;彭善碧;刘华;;利用瞬态正压波确定天然气管道冰堵位置[J];西南石油学院学报;2006年03期
8 田园;谢英;袁宗明;贺三;刘雪梅;;利用瞬态质量流量脉冲监测天然气管道堵塞[J];西南石油大学学报(自然科学版);2008年01期
9 李长俊,陈鑫,刘继,纪国富,李丙文,王海卿,骆建武,易国英;迦辽金法在管道不稳定流动分析中的应用[J];油气储运;2002年04期
10 宋艾玲;梁光川;王文耀;;世界油气管道现状与发展趋势[J];油气储运;2006年10期
相关博士学位论文 前1条
1 刘庆堂;高压天然气管网动态模拟与壅塞流动特性研究[D];山东大学;2010年
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