本文選題：導流條安放角　切入點：管道車　出處：《太原理工大學》2017年碩士論文

【摘要】：目前,物流運輸已經(jīng)成為社會關注的一個重要問題,傳統(tǒng)的運輸方式已不能滿足人們?nèi)找嬖鲩L的運輸需求,顯現(xiàn)出一些缺點,如運輸?shù)哪茉磫栴}、環(huán)境污染問題、交通問題等。筒裝料管道水力輸送技術的出現(xiàn)為物流運輸方式提供了一個新的方向,其具有土地占用率小、干凈清潔等諸多優(yōu)點。本文依托國家自然科學基金項目“管道縫隙螺旋流水力特性研究(51109155)”和“山西省自然科學基金項目(2015011067)”,采用理論分析及試驗研究相結合的方法,在試驗設計流量Q為40m3/h、輸送荷載為900g的工況下,對車長x車徑即Lx D分別為100mmx70mm,150mmx60mm,150mmx70mm的三種管道車車型,在不同導流條安放角條件下運移時形成的縫隙螺旋流速度特性展開了研究,得出的主要結論如下:(1)無論何種管道車車型在管道內(nèi)運行時,都將打破原來水流軸向速度的同心分布狀態(tài),軸向速度的最大值也從管中心向管壁移動;車中斷面的軸向流速變化梯度要小于車后和車前斷面。在同一工況下,直徑為60mm的管道車運移時形成的縫隙螺旋流的軸向速度整體大于管道水流平均流速,直徑為70mm的管道車運移時形成的縫隙螺旋流的軸向速度整體小于直徑為60mm的管道車。(2)隨著導流條安放角的增大,車后、車前斷面的縫隙螺旋流軸向速度均表現(xiàn)為先減少后增大再減少再增大的W分布規(guī)律;車中斷面縫隙螺旋流的軸向速度呈現(xiàn)隨之增大的規(guī)律。車后斷面縫隙螺旋流軸向速度的變化隨著導流條安放角度的增大變化幅度更大;車中斷面縫隙螺旋流軸向速度分布基本呈同心分布的規(guī)律,軸向速度最大值出現(xiàn)在測環(huán)為44mm的位置左右;車前斷面縫隙螺旋流軸向速度最大值隨著導流條安放角度的增大不再呈現(xiàn)突變的形式,而是平穩(wěn)增加到軸向速度最大值。(3)隨著導流條安放角的增大,車后斷面的縫隙螺旋流徑向速度表現(xiàn)為先增大后減小再增大的趨勢,基本呈N型分布;車中斷面的縫隙螺旋流徑向速度基本穩(wěn)定在0-0.04m/s之間;車前斷面的縫隙螺旋流徑向速度基本呈先增大后減少再增大再減少的M型分布。車后斷面縫隙螺旋流徑向速度的最大值隨著導流條安放角度的增大呈現(xiàn)先增大然后基本穩(wěn)定于0.5 m/s~0.6 m/s之間;車中斷面縫隙螺旋流徑向速度的變化范圍基本不隨導流條安放角的變化而變化;車前斷面縫隙螺旋流徑向速度的最小值基本都出現(xiàn)在90o、210o、330o左右。(4)隨著導流條安放角的增大,車后斷面的縫隙螺旋流周向速度呈先增大后減小再增大的N型分布;車中斷面的縫隙螺旋流周向速度呈現(xiàn)線性增長趨勢;車前斷面的縫隙螺旋流周向速度呈先增大后減少再增大再減少的M型分布規(guī)律。無論何種導流條安放角條件,車后斷面縫隙螺旋流周向速度的最大值一般都出現(xiàn)在120o、240o附近;隨著導流條的安裝以及安放角度的增大,車中斷面縫隙螺旋流周向速度分布越來越類似于同心環(huán)狀分布,且最大值越來越大,同一極軸上,測環(huán)半徑越小,同一測點的周向速度越大;車前斷面縫隙螺旋流周向速度,隨著導流條安放角的增大,其變化范圍越來越大。(5)無論何種車型,管道車平均車速和縫隙螺旋流軸向平均流速隨著導流條安放角的增大而逐漸趨向于管道水流平均流速。管道車的軸向運行速度都隨著導流條安放角的增大而增大,其中,100mmx70mm的管道車增加幅度最大(0.1999m/s),150mmx70mm的管道車增加幅度最小(0.114m/s)。
[Abstract]:At present, logistics has become an important issue of social concern, the traditional mode of transportation has been unable to meet the growing demand for transportation, show some disadvantages, such as transportation, energy, environmental pollution, traffic problems. The piped hydraulic transmission appears to send technology provides a new direction for mode of transport logistics, which has the advantages of small land occupancy rate, clean and so on. Research on pipe flow characteristics of spiral slot based on the National Natural Science Fund Project "(51109155)" and "Shanxi Province Natural Science Fund Project (2015011067)", by using the method of theoretical analysis and Experimental Research on the combination, in the design of flow test Q 40m3/h, transport load is 900g under the condition of X car Lx D length diameter were 100mmx70mm, 150mmx60mm, 150mmx70mm three pipeline car models, in the different installing angle of guide vanes The study on velocity characteristics of spiral slot formed under the condition of migration flows, the main conclusions are as follows: (1) no matter what kind of pipeline cars running in the pipeline, will break the original distribution of concentric axial velocity flow, the maximum axial velocity from the pipe center to the wall movement; the axial velocity changes the car should be smaller than the gradient section of the car and the front section. At the same condition, the axial velocity of spiral slot tube formation of 60mm when the car is moving the whole is greater than the diameter of the pipe flow velocity, axial velocity of spiral slot 70mm pipeline flow formed by the car moves the whole is less than the pipe diameter of 60mm car diameter. (2) with the guide bar increases, setting angle of the car, the front section of the spiral slot axial velocity were reduced after the first increase and then reduce the distribution of W is increased; the car break surface spiral slot The axial velocity of flow is increased. The law of change of the section spiral slot flow axial velocity after the car with the guide vanes installing angle increases larger change; axial velocity distribution in concentric distribution section spiral slot flow in the car, the maximum axial velocity is measured as the location of the 44mm ring; axial flow the front section of the maximum speed of spiral slot with guide vanes placed increased angle showed no mutation form, but steadily increased to the maximum axial velocity. (3) with guide vanes installing angle increasing, the car section of the slit spiral flow for radial velocity increases first and then decreases and then increases again, is N distribution; spiral slot car section flow stable radial velocity between 0-0.04m/s; decreases then increases and then reduces the M spiral slot section of the front radial flow speed increases at first and then Type distribution. The maximum radial velocity section spiral slot flow after the car with the guide bar to increase setting angle showing the first increase and then basically stable between 0.5 m/s~0.6 m/s; range of radial velocity profile of flow spiral slot in the car almost does not change with the change of the installing angle of guide vanes; the front section of the spiral flow gap radial velocity the minimum value basically appear in the 90o, 210o, 330o. (4) with guide vanes installing angle increasing, the car after the spiral slot section of the flow circumferential velocity decreases and then increase the distribution of N increased after the first car in the cross section of the spiral slot; flow circumferential velocity has a linear growth trend; spiral slot car section flow circumferential velocity distribution is M then increases and then decrease decrease after the first rise. Whatever the installing angle of guide vanes, the car section spiral slot flow maximum circumferential speed generally appears in the 120o, Near 240o; with the increase of guide vanes and the setting angle, the car section spiral slot flow circumferential velocity distribution is more and more similar to the concentric circle distribution, and the maximum value is more and more big, the same pole axis, measuring the smaller radius of the ring, the same measuring point of the circumferential velocity increasing; the front section of the gap the spiral flow circumferential velocity, with guide vanes installing angle increases, the range is more and more big. (5) no matter what kind of models, pipe vehicle average speed and average velocity of axial spiral slot with guide vanes installing angle and increases gradually tend to average flow velocity. The pipeline axial speed of the pipe vehicle with diversion the increase of installing angle increases, the 100mmx70mm of the pipe vehicle has the largest increase in 150mmx70mm (0.1999m/s), the smallest increase of tube vehicle (0.114m/s).

【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U171

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