【摘要】：在傳統(tǒng)大波動(dòng)過(guò)渡過(guò)程計(jì)算中,調(diào)壓室底部連接管的影響往往是作為阻抗孔來(lái)考慮,在連接管較長(zhǎng)的情況下,采用阻抗孔處理時(shí)而忽略了連接管的水體彈性,因而容易造成較大誤差。通過(guò)建立考慮了連接管及不考慮連接管時(shí)的調(diào)壓室節(jié)點(diǎn)數(shù)學(xué)模型,采用Gardel公式來(lái)處理調(diào)壓室的阻抗系數(shù),將調(diào)壓室的阻抗系數(shù)變?yōu)樨?fù)荷實(shí)際情況的動(dòng)態(tài)阻抗系數(shù),并結(jié)合具體工程實(shí)例來(lái)分析連接管的長(zhǎng)度及管徑的變化對(duì)調(diào)壓室涌浪、蝸殼進(jìn)口壓力以及機(jī)組轉(zhuǎn)速所產(chǎn)生的影響。研究結(jié)果表明,對(duì)于連接管較長(zhǎng)的情況,應(yīng)考慮到連接管的作用,為了能充分反射水錘,連接管的面積不宜過(guò)小。
[Abstract]:In the traditional calculation of the large wave transition process, the influence of the bottom connecting tube of the surge chamber is usually considered as an impedance hole. When the connecting pipe is long, the water elasticity of the connecting pipe is neglected when the impedance hole is used. As a result, it is easy to cause large errors. By establishing the mathematical model of the surge chamber node considering the connecting tube and not considering the connecting tube, the impedance coefficient of the surge chamber is treated by the Gardel formula, and the impedance coefficient of the surge chamber is changed into the dynamic impedance coefficient of the actual load condition. The influence of the length and diameter of the connecting pipe on surge of surge chamber, inlet pressure of volute and rotating speed of unit is analyzed with concrete engineering examples. The results show that the connecting pipe should be taken into account in the case of long connecting pipe. In order to reflect the water hammer fully, the area of the connecting pipe should not be too small.
【作者單位】： 中國(guó)電建集團(tuán)華東勘測(cè)設(shè)計(jì)研究院有限公司;
【分類(lèi)號(hào)】：TV732.5
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本文編號(hào)：2442677