Study On The Influence Of The Number Of Guided Strips Of Pipe Car Body On The Flow Velocity Characteristics Of Spiral Flow In Pipeline

With the rapid development of the national economy,the requirement for high efficiency of logistics and transportation has become a social focus issue that needs to be solved urgently.The traditional transportation method has an increasing demand for energy,and the pollution caused by energy consumption has become a common concern.The hydraulic conveying technology of the barrel charging pipeline recycles the clean water energy to generate the conveying power,which overcomes some drawbacks of the traditional transportation mode.In this paper,based on the National Natural Science Foundation project "Study on the hydraulic characteristics of pipeline slit spiral flow(51109155)" and "Research on the energy consumption of pipeline train hydraulic transport(51179116)",Shanxi Natural Science Foundation Project(201701D221137),the results and theory of physical test research Based on the analysis,the annular spiral flow of the pipeline car with different number of guide bars placed in the body is studied and analyzed.The main conclusions are as follows:(1)Under the condition of different number of diversion bars,the overall distribution characteristics of the axial velocity of the test section of the body annulus area are basically the same,and the average value of the axial velocity of each test section remains basically unchanged.The axial velocity variation of each test section after the vehicle is basically similar,but the axial velocity variation amplitude is significantly smaller than the axial velocity of the vehicle test section.(2)The circumferential velocity of each test section is generally increased first and then decreased with the increase of the number of guide bars.The radial velocity and circumferential velocity of each test section are basically similar,only individual poles.The radial velocity of the measuring point on the axis changes slightly.(3)When the number of guide bars is the same,the axial velocity of the body annulus region gradually decreases along the gradient of the distribution,and there is a clear flow velocity and low velocity zone.The axial velocity of each test section is more severe.The axial velocity of the test section in the full pipe area of the vehicle shows a decreasing trend along the path.From the local distribution characteristics of the axial velocity,the axial velocity of the measuring point on the same characteristic pole axis of the vehicle body and each test section after the vehicle is changed.The magnitude is small.(4)When the number of diversion bars is the same,the contour map of the overall distribution of the circumferential velocity of the vehicle body and the rear test section exhibits a "dense-dense-density" variation law,and the circumferential velocity gradient decreases first and then increases.Large,overall,the axial velocity is one order of magnitude larger than the circumferential velocity.From the local distribution characteristics of the circumferential velocity,the distribution of the circumferential velocity on the same polar axis is relatively stable,and the variation range is not large.(5)When the number of diversion bars is the same,the axial velocity of the test section of the vehicle body is 2 orders of magnitude larger than the radial velocity,and the radial velocity direction of 2/3 deviates from the center of the circle,showing a gradually increasing trend along the way.The radial velocity of the test section shows a gradually decreasing trend along the path.The average value of the radial velocity of each test section was generally reduced first and then increased.From the local distribution characteristics of the radial velocity,the range of the radial velocity fluctuation interval on the same polar axis gradually increases.(6)According to the experimental data analysis of this paper,when the pipe flow is constant,when the number of guide bars installed in the vehicle body is P=4,the axial speed and circumferential speed of the vehicle body section reach the maximum value,and the circumferential speed of each test section of the vehicle body changes.It is gentle,so the number of guide bars P=4 is the optimal number of guide bars.The research results of this paper enrich and improve the theory and technology of hydraulic conveying of the barrel charging pipeline,and provide reference for the structural optimization of the pipeline truck and the application and promotion of the hydraulic conveying technology of the cylinder charging pipeline.