【摘要】：筒裝料管道水力運(yùn)輸是一種環(huán)保、節(jié)能、高效安全的運(yùn)輸方式。該輸送方式符合我國(guó)可持續(xù)發(fā)展的理念,是一種節(jié)能環(huán)保的新型管道水力輸送方法。這種運(yùn)送方法跟傳統(tǒng)的漿體管道水力和型料管道水力運(yùn)送方式有所區(qū)別,是一種新時(shí)代下極有研發(fā)前景的科學(xué)技術(shù),具有非常廣闊的應(yīng)用發(fā)展前景。本文結(jié)合國(guó)家自然基金項(xiàng)目“管道列車水力輸送能耗研究(51179116)”、“管道縫隙螺旋流水力特性研究(51109155)”和山西省自然科學(xué)基金項(xiàng)目(2015011067),通過(guò)試驗(yàn)和數(shù)值模擬相結(jié)合的方法,對(duì)不同導(dǎo)流條長(zhǎng)度管道車運(yùn)移時(shí)產(chǎn)生的縫隙螺旋流流速特性進(jìn)行研究,得出如下結(jié)論:(1)當(dāng)導(dǎo)流條長(zhǎng)度為唯一變量時(shí),管道車在管道內(nèi)的運(yùn)移速度隨著導(dǎo)流條長(zhǎng)度的增大而增大;當(dāng)管道車的車型為唯一變量時(shí),管道車運(yùn)移速度從大到小依次為車型L×D=150×70mm管道車、L×D=100×70mm管道車、L×D=150×60mm管道車,由此可見(jiàn)管道車車徑對(duì)運(yùn)移速度的影響大于管道車的長(zhǎng)度。(2)當(dāng)不同導(dǎo)流條長(zhǎng)度管道車在平直管段運(yùn)移時(shí),其縫隙內(nèi)水流在靠近管道車車端的斷面上水流速度分布稍有不同,主要表現(xiàn)在流速形成的渦區(qū)更多以及速度梯度變大。對(duì)于同一管道車,沿車身方向縫隙螺旋流的三維流速分布規(guī)律是由不穩(wěn)定向穩(wěn)定趨近,再逐漸變?yōu)椴环�(wěn)定�？p隙螺旋流的軸向速度分布相對(duì)于其徑向和周向速度分布相對(duì)穩(wěn)定,且軸向速度的數(shù)值也遠(yuǎn)大于縫隙流的徑向和周向速度;導(dǎo)流條長(zhǎng)度的增大會(huì)影響縫隙內(nèi)水流徑向流動(dòng)的方向,導(dǎo)流條越長(zhǎng),方向?yàn)楸畴x管道圓心的水流就越多;同種車型管道車隨著導(dǎo)流條長(zhǎng)度的增大,縫隙內(nèi)各斷面周向流速基本呈增大的趨勢(shì)。(3)在其他工況不變的情況下,以車中斷面3斷面為研究斷面,得出當(dāng)極軸附近沒(méi)有導(dǎo)流條存在時(shí),縫隙螺旋流的軸向流速在離管道中心44mm處達(dá)到最大值,而當(dāng)極軸附近有導(dǎo)流條的存在時(shí),軸上的水流軸向流速變化趨勢(shì)發(fā)生明顯的變化,在布置的測(cè)環(huán)上,離管道中心越遠(yuǎn),其軸向流速越大。(4)在其他工況不變的情況下,縫隙內(nèi)測(cè)試斷面極軸上的軸向速度沿車身方向分布規(guī)律基本相似,沿車身從車后斷面到車前斷面呈先增大后減小再增大再減小的“M”字型趨勢(shì)。而縫隙螺旋流的徑向和周向速度沿車身上測(cè)試斷面的突變頻率較高,并在4斷面(車中和車前中間的斷面)處出現(xiàn)較大的數(shù)值。(5)通過(guò)比較不同導(dǎo)流條長(zhǎng)度管道車的平均運(yùn)移速度、縫隙流平均速度和管道內(nèi)水流的平均流速,得出了當(dāng)導(dǎo)流條長(zhǎng)度增大時(shí),管道車運(yùn)移平均速度和縫隙流平均流速的變化率,分析了不同導(dǎo)流條長(zhǎng)度對(duì)管道車運(yùn)移速度和縫隙流平均速度帶來(lái)的影響。(6)通過(guò)數(shù)值模擬的方法,對(duì)不同導(dǎo)流條長(zhǎng)度管道車在平直管段運(yùn)移時(shí)的縫隙螺旋流流場(chǎng)的三維速度進(jìn)行了計(jì)算模擬,并與試驗(yàn)結(jié)果進(jìn)行了對(duì)比,結(jié)果基本一致。
[Abstract]:Hydraulic transportation of barrel-filling pipeline is an environmental-friendly, energy-saving, high-efficient and safe way of transportation. This transportation mode accords with the concept of sustainable development in our country and is a new type of pipeline hydraulic transportation method of saving energy and environmental protection. This transportation method is different from the traditional hydraulic transportation method of slurry pipeline and shaped material pipeline. It is a kind of science and technology with great prospect of research and development in the new era and has a very broad prospect of application and development. In this paper, the research on the energy consumption of pipeline train hydraulic transportation (51179116), the characteristics of helical flow force of pipeline gap (51109155) and the natural science fund project of Shanxi Province (2015011067) are combined with the National Natural Fund project "Research on Energy consumption of Pipeline Trains" (51179116). Through the combination of experiment and numerical simulation, the flow velocity characteristics of the slot helical flow produced by the pipeline vehicle with different diversion strip lengths are studied. The conclusions are as follows: (1) when the length of the guide strip is a unique variable, The moving speed of pipeline car in the pipeline increases with the increase of the length of the guide strip. When the vehicle type of pipeline vehicle is the only variable, the speed of pipeline vehicle moving from large to small is L 脳 DX 150 脳 70mm pipeline vehicle, L 脳 D0 100 脳 70mm pipeline car, L 脳 DX 150 脳 60mm pipeline car. It can be seen that the influence of pipeline car diameter on the moving speed is greater than the length of pipeline car. (2) when the pipeline car with different length of diversion strip moves in the straight section, The velocity distribution of the flow in the gap is slightly different in the section near the vehicle end of the pipeline, mainly because the vortex region formed by the velocity of velocity is more and the velocity gradient becomes larger. For the same pipe-car, the 3-D velocity distribution law of helical flow along the body direction is from instability to stability, and then to instability. The axial velocity distribution of the slot helical flow is relatively stable relative to its radial and circumferential velocity distribution, and the axial velocity is much larger than the radial and circumferential velocity of the slot flow. The increase of the length of the guide strip will affect the direction of the radial flow in the slot. The longer the strip, the more the flow direction deviates from the center of the pipe. With the increase of the length of the guide strip of the same type, the flow velocity of each section in the slot basically increases. (3) taking section 3 of the car as the research section, When there is no guide strip near the polar axis, the axial velocity of the slot helical flow reaches the maximum value at the point of 44mm from the center of the pipe, and when there is a guide strip near the polar axis, the trend of the axial velocity of the flow on the axis changes obviously. The farther away from the center of the pipeline, the greater the axial velocity is. (4) the axial velocity of the polar axis of the test section in the gap is similar to that of the body under the same conditions. Along the body from the rear section to the front section of the car showed a trend of "M" glyph, which increased first, then decreased and then decreased. However, the radial and circumferential velocity of the helical flow in the crevice is higher than that in the test section. At the four sections (the section in the middle of the vehicle and the middle section in the front of the vehicle), a large number of values appear. (5) by comparing the average moving speed, the average velocity of the slot flow and the average velocity of the flow in the pipeline, the average moving speed, the average velocity of the slot flow and the flow velocity in the pipeline are compared with each other. When the length of the guide strip increases, the change rate of the average velocity of the pipeline car and the average velocity of the slot flow is obtained. The influence of different length of guide strip on the moving speed and the average velocity of slot flow of pipeline vehicle is analyzed. (6) the method of numerical simulation is used. The 3-D velocity of the helical flow field in the slot of pipeline car with different length of diversion strip is simulated and compared with the experimental results, and the results are in good agreement with the experimental results.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TV134

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