作　　者： ; ; ;

机构地区： 中国石油大学华东机电工程学院

出　　处： 《西安工业大学学报》 2007年第3期219-222,237,共5页

摘　　要： 在钻井及采油工艺中许多流体表现为非牛顿宾汉流体特性,在现场施工中其流动换热特性将直接影响到井底参数的确定.从流体动量方程和能量方程出发,结合宾汉流体的本构方程,建立了宾汉流体环空中流动和换热充分发展时的控制方程组,并在恒壁温边界条件下对方程组进行了求解.得到了宾汉流体在环空中的温度分布规律.结果表明,宾汉流体截面上的温度分布与速度分布近似;等速核内温度随着压力梯度的增加而增加,随着屈服应力的增加而减小,随着视粘度的增加而增加;但等速核内的温度并不相等. A lot of fluid presents Bingham fluid characters in drilling or oil production, its flow and heat transfer attributes directly affect how to determine on-site downhole operation parameters. Combining the constitutive equations of Bingham fluid with the momentum equation and energy equations of non- Newtonian fluid, a mathematical model for fully developed convective heat transfer of Bingham fluid flowing in an annular duct is set up. The model is solved under boundary conditions of constant wall temperature and the temperature distribution of Bingham fluid in the annular duct is obtained. The results show that the temperature distribution of Bingham fluid is similar to its velocity distribution. The temperatures of constant speed core increase while the pressure gradient and visual viscosity rise, but the temperatures decreade with the increase of yield stress. The temperatures within the constant speed core are equal.

关 键 词： 宾汉流体 温度分布 速度分布 影响因素

领　　域： [石油与天然气工程]