Study On Concentric Annular Gap Of Spiral Flow Characteristics Of Different Guide Vane Length Of The Piped Carriage Formed In The Condition Of Not Moving

In recent years, along with an unprecedented economic development,transportation occupies a crucial position in the national life. The traditionalway of the Metropolitan Transportation damage to the environment, and withthe whole of human awareness of environmental protection, the traditional highenergy consumption, high pollution of transportation gradually no longer adaptto the times, so the need to develop a new low carbon transport.The hydraulictransportation of TRM (tube-contained raw material) is the product to meet thisrequirement.The hydraulic transportation of TRM (tube-contained row material) is anemerging concept in the field of pipeline transportation and a improvementto the traditional pipeline transportation.In this paper, combined with theNational Natural Science Foundation of China "research gap spiral pipe flowforce characteristics (51109155)" and "train hydraulic pipeline transport energyresearch (51179116)", adopted theoretical analysis, experimental studies and numerical simulation methods to research the hydraulic characteristicsof concentric annular gap spiral flow characteristics of pipe carriage withdifferent guide vane in the condition of not moving.The main conclusions arethe following：(1) Under the same flow rate, with the increase in the length of the pipelinecarriage guide vanes, the pressure value of gap spiral flow in the back and frontsection show a decreasing trend again after first decreases and then increases,in the middle section showed first increased and then decreased andthen increased which the guide vane length l=0.25L, the average pressure ofthe smallest of the three test sections.(2) Under the same flow rate, with the increase in the length of the pipelinecarriage guide vanes, axial velocity value gap spiral flow in the bank sectionshowed a gradual increasing trend, in the middle and front section of the sectionwere decreased after the first increased and then decreased gradually, the guidevane length l=0.75L, the average of the three axial maximum speed test section.(3) Under the same flow rate, with the increase in the length of thepipeline carriage guide vanes, radial velocity of gap spiral flow in the backsection showed decreases and then increases again after decreasing trend, infront section showed a tendency to increase again after the first increases andthen decreases, which vane length l=0.5L, the three test sections mean radialvelocity maximum. (4) Under the same flow rate, with the increase in the length of the pipelinecarriage guide vanes, tangential velocity of gap spiral flow velocity in the backsection showed a gradually increasing trend, in the middle section showed adecreasing trend after the first increase,in the front section show a tendency toincrease again after the first increases and then decreases, which leaves thelength l=0.5L guide, the three test sections average weekly maximum velocity.(5) Under same flow rate, to the piped carriage with guide vanes, thepressure value of the water flow guide vanes is greater than the concave side islocated in the convex side of the vane pressure value, the absolute value of theradial velocity and the relative magnitudes of the pressure values same sizerelationship, the relationship between the size of the opposite axial velocity andthe tangential velocity magnitude relation between the pressure values.(6) The same model piped carriage, the gap spiral flow section, thepressure value of the carriage in front of the rear section of the pressure value isgreater than in the carriage section of the car; the gap at the maximum axialvelocity spiral flow cross-section of the carriage appeared in the wall near thecarriage center gap, the gap spiral flow and axial flow velocity in the carriagebefore the carriage section of the wall near the maximum in the center of thegap; the gap spiral flow in the carriage section, the carriage section, the radialvelocity of the front section of the carriage and circumferential the size of theaverage trend rate decreases after the first increase. (7)The use of the flow field flow gap FLUENT software in the straightsections of pipe carriage stationary state arising from the numerical simulation,analysis of changes in the flow field in the gap pressure and three-dimensionalvelocity distribution characteristics and comparison with the measuredexperimental verification, The results are basically the same.The study results of the static boundary gap spiral flow of research andpiped carriage application in the actual production provides a theoretical basis.