發(fā)布時(shí)間：2018-01-16 05:29

  本文關(guān)鍵詞：管道阻力參數(shù)測(cè)定系統(tǒng)的研制　出處：《沈陽(yáng)農(nóng)業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 管道阻力參數(shù) 測(cè)定系統(tǒng) 紊流區(qū) 相對(duì)誤差 當(dāng)量粗糙度

【摘要】：管道阻力參數(shù)作為管道重要的流體力學(xué)參數(shù),在管道水力計(jì)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(dāng)量粗糙度Ks等。隨著經(jīng)濟(jì)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(yīng)的阻力參數(shù)值表,給設(shè)計(jì)人員在管道工程設(shè)計(jì)中帶來(lái)了一定的困難,所以新型管道在投入使用前,需對(duì)其進(jìn)行管道原型水力阻力參數(shù)測(cè)定試驗(yàn),測(cè)定相應(yīng)的阻力參數(shù)值或其取值范圍。為了對(duì)新型管道阻力參數(shù)進(jìn)行測(cè)定,本文擬研制一套管道阻力參數(shù)測(cè)定系統(tǒng),可以在工程管道設(shè)計(jì)中對(duì)新型管道的阻力參數(shù)進(jìn)行測(cè)定,避免工程設(shè)計(jì)時(shí)出現(xiàn)按經(jīng)驗(yàn)給出的阻力參數(shù)不準(zhǔn)確而造成不利的影響。同時(shí),通過(guò)三種常見(jiàn)的塑料管道對(duì)該系統(tǒng)進(jìn)行精確度檢驗(yàn),確定系統(tǒng)的適用性,并且得到三種管道不同管徑時(shí)的阻力參數(shù)值或其取值范圍,可應(yīng)用于實(shí)踐工程中。通過(guò)查閱與管道阻力參數(shù)測(cè)定試驗(yàn)相關(guān)的文獻(xiàn)以及水力學(xué)書籍,并總結(jié)前人試驗(yàn)裝置的優(yōu)缺點(diǎn),擬定出本文的主要的研究?jī)?nèi)容為:(1)探討管道阻力參數(shù)測(cè)定系統(tǒng)的設(shè)計(jì)原理、相應(yīng)的試驗(yàn)理論以及實(shí)驗(yàn)結(jié)果的處理分析方法;(2)規(guī)劃管道阻力參數(shù)測(cè)定系統(tǒng)的整體布置,研究主要試驗(yàn)裝置的設(shè)計(jì)與制作過(guò)程以及各裝置之間的聯(lián)系;(3)擬定本文的試驗(yàn)方案和試驗(yàn)步驟,確定試驗(yàn)中所需要的儀器設(shè)備;(4)處理分析相關(guān)試驗(yàn)結(jié)果,確定阻力參數(shù)值或其取值范圍以及相應(yīng)的相對(duì)誤差;(5)確定管道阻力參數(shù)測(cè)定系統(tǒng)的精確度。通過(guò)三種常見(jiàn)塑料管道阻力參數(shù)的計(jì)算分析,得到以下結(jié)論:(1)管道阻力參數(shù)測(cè)定系統(tǒng)的準(zhǔn)確度較高,適用性較強(qiáng);(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(yīng)的取值或取值范圍,通過(guò)誤差分析得到了系統(tǒng)對(duì)于每個(gè)阻力參數(shù)的相對(duì)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(xué)位授予單位】：沈陽(yáng)農(nóng)業(yè)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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