| 孔祥伟,林元华,邱伊婕,董龙.虚拟质量力对酸性气体-钻井液两相流波速的影响[J].计算力学学报,2014,31(5):622~627 |
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| 虚拟质量力对酸性气体-钻井液两相流波速的影响 |
| Influence of virtual mass force on two-phase wave velocity in acid gas and mud |
| 投稿时间：2013-04-09 修订日期：2013-07-23 |
| DOI：10.7511/jslx201405013 |
| 中文关键词: 虚拟质量力 酸性气体 压力波波速 钻井液 气液两相 |
| 英文关键词:virtual mass force acid gas pressure wave velocity drilling mud gas and liquid two-phase |
| 基金项目:国家自然科学基金（51074135，51274170）；四川省科技创新团队（2011JTD0034）资助项目. |
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| 中文摘要: |
| 基于两流体模型、酸性气体和钻井液状态方程，考虑酸性气体与钻井液相间虚拟质量力、粘性剪切力、相间动量交换及狭义相间阻力等条件，建立酸性气体与钻井液两相中压力波传播速度的数学模型，依据小扰动原理，对波速模型求解，得到关于波数K的波速方程。结果表明，在一定范围内，随空隙率、频率的增大，虚拟质量力对波速的影响显著增强；在高空隙率下，压强增大，虚拟质量力对波速的影响减弱；增大流体的密度或不可压缩性，均可使两相压力波速增大；延长气液交换时间或减小波动频率使相间有足够时间进行动量交换，两相压力波波速随之减小。 |
| 英文摘要: |
| With consideration of interphase virtual mass force,viscous shearing force,narrow interphase momentum exchange,interphae resistance,a mathematical model for predicting the propagation velocity of pressure wave in two-phase flow of acid gas and drilling fluid was proposed based on the two-fluid model and equation of state for acid gas and drilling fluid.The p mathematical model was solved by using the small perturbation theory,and a model concerning wave number K was derived to calculate the wave velocity.Calculation results indicate that the influence of virtual mass force becomes more prominent with the increase of angular frequency and void fraction within a certain range.At high void fraction,the influence of virtual mass force appears a weakening trend with the increase of pressure.Both the increase of density and incompressibility of two-phase fluid contribute to the increase of pressure wave velocity.It is the prolongation of gas-liquid exchange time and decrease of fluctuation frequency that supply sufficient time for momentum exchange,and slow down the pressure wave velocity accordingly. |
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