本文關(guān)鍵詞：管道阻力參數(shù)測定系統(tǒng)的研制　出處：《沈陽農(nóng)業(yè)大學》2017年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 管道阻力參數(shù) 測定系統(tǒng) 紊流區(qū) 相對誤差 當量粗糙度

【摘要】：管道阻力參數(shù)作為管道重要的流體力學參數(shù),在管道水力計算中起決定性的作用。管道阻力參數(shù)包括:曼寧糙率系數(shù)n、沿程水頭損失系數(shù)λ、海澄-威廉系數(shù)Ch和當量粗糙度Ks等。隨著經(jīng)濟水平的快速發(fā)展,新型管道不斷的被推出,而新型管道缺乏相應的阻力參數(shù)值表,給設(shè)計人員在管道工程設(shè)計中帶來了一定的困難,所以新型管道在投入使用前,需對其進行管道原型水力阻力參數(shù)測定試驗,測定相應的阻力參數(shù)值或其取值范圍。為了對新型管道阻力參數(shù)進行測定,本文擬研制一套管道阻力參數(shù)測定系統(tǒng),可以在工程管道設(shè)計中對新型管道的阻力參數(shù)進行測定,避免工程設(shè)計時出現(xiàn)按經(jīng)驗給出的阻力參數(shù)不準確而造成不利的影響。同時,通過三種常見的塑料管道對該系統(tǒng)進行精確度檢驗,確定系統(tǒng)的適用性,并且得到三種管道不同管徑時的阻力參數(shù)值或其取值范圍,可應用于實踐工程中。通過查閱與管道阻力參數(shù)測定試驗相關(guān)的文獻以及水力學書籍,并總結(jié)前人試驗裝置的優(yōu)缺點,擬定出本文的主要的研究內(nèi)容為:(1)探討管道阻力參數(shù)測定系統(tǒng)的設(shè)計原理、相應的試驗理論以及實驗結(jié)果的處理分析方法;(2)規(guī)劃管道阻力參數(shù)測定系統(tǒng)的整體布置,研究主要試驗裝置的設(shè)計與制作過程以及各裝置之間的聯(lián)系;(3)擬定本文的試驗方案和試驗步驟,確定試驗中所需要的儀器設(shè)備;(4)處理分析相關(guān)試驗結(jié)果,確定阻力參數(shù)值或其取值范圍以及相應的相對誤差;(5)確定管道阻力參數(shù)測定系統(tǒng)的精確度。通過三種常見塑料管道阻力參數(shù)的計算分析,得到以下結(jié)論:(1)管道阻力參數(shù)測定系統(tǒng)的準確度較高,適用性較強;(2)明確了三種管道阻力參數(shù)的變化情況,并確定了其相應的取值或取值范圍,通過誤差分析得到了系統(tǒng)對于每個阻力參數(shù)的相對誤差。
[Abstract]:As an important hydrodynamic parameter, pipeline resistance parameters play a decisive role in pipeline hydraulic calculation. Pipeline resistance parameters include: Manning roughness coefficient n, along the hydraulic head loss coefficient 位. Along with the rapid development of economic level, the new type of pipeline has been pushed out continuously, but the new type pipeline lacks the corresponding resistance parameter value table. It has brought some difficulties to the designers in the pipeline engineering design, so it is necessary to test the hydraulic resistance parameters of the new type pipeline before it is put into use. In order to measure the resistance parameters of a new type of pipeline, a system for measuring the resistance parameters of pipelines is developed in this paper. The resistance parameters of the new type pipeline can be measured in the engineering pipeline design to avoid the adverse effect caused by the inaccuracy of the resistance parameters given by experience in the engineering design. The accuracy of the system is tested by three kinds of common plastic pipes, the applicability of the system is determined, and the resistance parameters or the range of the values are obtained when the pipes are of different diameters. It can be used in practical engineering. By consulting the literature and hydraulics books related to the pipe resistance parameter measurement test, the advantages and disadvantages of the former experimental equipment are summarized. The main research contents of this paper are as follows: (1) to discuss the design principle of the pipeline resistance parameter measurement system, the corresponding test theory and the analysis method of the experimental results; (2) to plan the overall arrangement of the pipeline resistance parameter measurement system, to study the design and manufacture process of the main test equipment and the relationship between the devices; (3) drawing up the test plan and procedure of this paper, and determining the instruments and equipments needed in the test; (4) processing and analyzing relevant test results, determining the value of resistance parameter or the range of its value and the relative error; Through the calculation and analysis of three kinds of common plastic pipe resistance parameters, the following conclusion is drawn: 1) the accuracy of the pipeline resistance parameter measurement system is high. The applicability is strong; 2) the variation of three kinds of pipeline resistance parameters is defined, and the corresponding values or ranges are determined, and the relative errors of the system for each resistance parameter are obtained by error analysis.
【學位授予單位】：沈陽農(nóng)業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TV134

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本文編號：1431773