本文選題：兩相流 + 氣液兩相球閥　； 參考：《流體機械》2017年04期

【摘要】：為研究不同含氣率對油氣混輸泵泵閥內(nèi)部流場的影響,運用CFD軟件對油氣混輸泵球閥內(nèi)部氣液兩相分布、速度場及進出口壓差進行了模擬仿真。同時對球閥進行試驗研究,測量出球閥進出口的壓力值,以驗證模擬結(jié)果的準(zhǔn)確性。試驗表明:模擬值與試驗值數(shù)據(jù)誤差不超過15%,模擬較為準(zhǔn)確。在相同的開啟高度、進出口流量下,隨著含氣率的增加,球閥內(nèi)流體的壓差降低幅度高達90%以上,且其降低較均勻。與此同時,流體密度降低并沒有使流量系數(shù)和阻力系數(shù)有明顯的變化。觀察兩相云圖可以發(fā)現(xiàn),在閥球尾部A處產(chǎn)生了旋渦,旋渦隨含氣率的增加略微增多;突擴界面C處產(chǎn)生了二次回流,使得該處的氣相也較多,而在閥球四周內(nèi)壁,氣相分布較少。同時可觀察出,流體含氣率對閥球間隙處速度的影響不大,但是對流動狀態(tài)有一定的影響。
[Abstract]:In order to study the effect of different gas content on the internal flow field of oil-gas mixed pump valve, the gas-liquid two-phase distribution, velocity field and pressure difference between inlet and outlet of ball valve of oil-gas mixed transportation pump were simulated by CFD software. At the same time, the pressure value of the ball valve inlet and outlet was measured to verify the accuracy of the simulation results. The experimental results show that the error between the simulated value and the experimental value is not more than 15, and the simulation is more accurate. At the same opening height and inlet / outlet flow rate, the pressure difference of the fluid in the ball valve decreases by more than 90% with the increase of the gas content, and the decrease is more uniform. At the same time, the decrease of fluid density has no obvious change in flow coefficient and resistance coefficient. By observing the two-phase cloud diagram, it can be found that there is a vortex at the end A of the valve ball, and the vortex increases slightly with the increase of the gas content, and the secondary reflux is produced at the C part of the sudden expansion interface, which makes the gas phase in the place also more, while the inner wall around the valve ball. The gas phase distribution is less. At the same time, it can be observed that the gas content of the fluid has little effect on the velocity of the valve ball clearance, but it has a certain effect on the flow state.
【作者單位】： 浙江工業(yè)大學(xué);過程裝備及其再制造教育部工程研究中心;長慶油田;
【基金】：國家自然科學(xué)基金資助項目(51406183)
【分類號】：TE974.3

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