本文選題：飛逸 + 軸流泵��； 參考：《中國農(nóng)村水利水電》2017年06期

【摘要】：針對事故飛逸的研究對泵裝置安全運(yùn)行十分重要。結(jié)合軸流泵裝置事故飛逸狀態(tài)的特點(diǎn),采用CFD計(jì)算軟件FLUENT,利用基于有限體積法的動網(wǎng)格技術(shù)對大套一站軸流泵裝置的飛逸狀態(tài)進(jìn)行了三維瞬態(tài)流動的數(shù)值模擬。獲得了軸流泵裝置飛逸狀態(tài)下的內(nèi)特性狀態(tài)及外特性參數(shù),同時(shí)在不同凈揚(yáng)程下對裝置進(jìn)行飛逸數(shù)值計(jì)算,發(fā)現(xiàn)飛逸轉(zhuǎn)速隨凈揚(yáng)程的升高而逐漸增大,葉片軸向力及進(jìn)出水邊的撞擊與脫流亦隨凈揚(yáng)程升高而增加。飛逸轉(zhuǎn)速數(shù)值模擬與模型試驗(yàn)結(jié)果對比顯示:飛逸轉(zhuǎn)速隨凈揚(yáng)程的變化規(guī)律與模型實(shí)驗(yàn)結(jié)果吻合較好,誤差在5%以內(nèi),本次數(shù)值模擬具有較好的準(zhǔn)確性。動網(wǎng)格技術(shù)能夠較好地應(yīng)用于軸流泵裝置飛逸狀態(tài)下內(nèi)部流場的動態(tài)變化的數(shù)值模擬,其結(jié)果可為飛逸狀態(tài)的研究提供了理論參考。
[Abstract]:The research of accident flight escape is very important to the safe operation of pump device. Combined with the characteristics of the accident flight state of the axial flow pump device, the 3D transient flow of the axial flow pump device was simulated by using the dynamic grid technology based on the finite volume method and the CFD calculation software fluent. The internal and external characteristic parameters of the axial flow pump device are obtained. At the same time, the flight escape value of the device is calculated under different net heads. It is found that the flight escape speed increases with the increase of the net head. The axial force of the blade and the impingement and deflow of the inlet and outlet edge also increased with the increase of the net head. The results of numerical simulation and model test show that the variation law of flight escape speed with net lift is in good agreement with the result of model experiment, and the error is less than 5%. The numerical simulation has good accuracy. The dynamic grid technique can be applied to the numerical simulation of the dynamic change of the internal flow field under the flight state of the axial flow pump device, and the results can provide a theoretical reference for the study of the flight escape state.
【作者單位】： 鹽城市通榆河樞紐工程管理處;河海大學(xué)能源與電氣學(xué)院;
【分類號】：TV675

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本文編號：1842892