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  本文選題：模型試驗　切入點：輸水工程　出處：《大連理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：遠距離輸水工程已成為缺水地區(qū)水資源嚴重短缺局面的重要工程手段。溢流塔在長輸工程中起著保護管道,防止水擊發(fā)生,穩(wěn)定管道內(nèi)壓強和流態(tài)的重要作用。傳統(tǒng)的溢流塔有著結(jié)構(gòu)復(fù)雜,工程投資高等缺點,本文在分析了傳統(tǒng)溢流塔的基礎(chǔ)上提出了雙管式穩(wěn)壓溢流塔這一新型溢流塔,采用物理模型試驗的方法對其水力特性進行了研究。本文所做工作有如下幾點： (1)介紹了長距離輸水工程的現(xiàn)實意義,并對輸水管道中水擊壓力的危害做了梳理,指出了溢流塔對保障輸水管道安全運行具有的重要作用。 (2)雙管式溢流塔在結(jié)構(gòu)上與虹吸管具有相似性,因此對虹吸管原理進行了概括,并將其與雙管式溢流塔進行比較。研究了溢流塔上水豎管中水流流速的分布規(guī)律和泄水豎管中水流的流態(tài),并分析了溢流塔中壓強的變化,并指出溢流塔在工程運行中應(yīng)注意的事項。 (3)研究了溢流塔泄流時流量與壓強的關(guān)系,總結(jié)了溢流塔頂部出現(xiàn)負壓的原因。 (4)結(jié)合工程實際,對原方案進行了優(yōu)化改進,給出了溢流塔壓力水頭與泄流量的關(guān)系式,為工程實踐提供參考。
[Abstract]:An important means of long-distance water transfer project has become a serious shortage of water resources shortage area situation. Overflow tower plays in the long distance pipeline protection project, to prevent water hammer occurs, an important role in stabilizing the pipeline pressure and flow. The traditional overflow tower has a complex structure, project investment disadvantages, based on the analysis of the the traditional overflow tower on the double pipe type regulator overflow tower which is a new type of overflow tower, using the method of physical model test was carried out to study the hydraulic characteristics. The work of this paper are as follows:
(1) the practical significance of long distance water conveyance project is introduced, and the harm of water hammer pressure in water conveyance pipeline is combed. It is pointed out that the overflow tower plays an important role in ensuring the safe operation of water conveyance pipeline.
(2) double tube type overflow tower structure and the rainbow Straw is similar, so the Hong Straw principle were summarized, and compared with the double pipe overflow tower. The flow velocity of fluid flow in the standpipe water overflow tower distribution and drainage standpipe, and analyzes the changes of pressure relief in the tower, and points out matters overflow tower should be paid attention to in the running process of the project.
(3) the relationship between the flow and pressure of the overflow tower is studied, and the cause of the negative pressure on the top of the overflow tower is summarized.
(4) combined with the actual project, the original scheme was optimized and improved, and the relationship between the pressure head of the overflow tower and the discharge flow was given, and the reference for the engineering practice was provided.

【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV67;TV134

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本文編號：1570759