随着蓄热体基础部件的尺寸细小化，玄武岩蓄热体的纤维直径微小，顺排排列后，内部形成微细流道。为探究微尺度下产生的尺度效应对玄武岩纤维束内部流道流动和传热的数值模拟的影响，建立了蓄热体的二维层流模型。通过Ansys 17.0 fluent中的UDF函数添加了滑移边界条件，以添加滑移边界条件前后的壁面努塞尔数（Nu）减小百分比为评价指标，对比分析二维纤维束微流道的数值模拟中，滑移边界条件对不同工况下流固换热的影响程度。模拟结果表明：随着温度和间距的增大，添加滑移边界条件后的Nu下降程度会增大；随着纤维排数和入口速度的增加，Nu下降程度会减小；纤维束直径d为20 μm，排数小于5排，中心间距超过3 d时，添加了滑移边界条件的Nu的降幅达到了1%以上，在数值模拟中不可忽略滑移流区的影响。

As the size of the basic parts of the heat storage body becomes smaller,the diameter of basalt regenerator fiber is very small,so that micro channels are formed among fibers in line arrangement. In order to explore the influence of the scale effect generated at the microscale on the numerical simulation of the flow and heat transfer in the internal flow channel of the basalt fiber bundle,a twodimensional laminar flow model of the heat storage body is established. The slip boundary condition is added to the simulation by the userdefined function (UDF) in Ansys fluent 17.0. Taking the percentage of wall Nusselt number (Nu) decrease as the evaluation index,the comparative analysis method is used to analyze the influence degree of the slip boundary condition on the fluidsolid heat transfer under different working conditions in the numerical simulation of the twodimensional fiber bundle microchannel. The simulation results show that with the increase of temperature and spacing,Nu decreases more after the addition of slip boundary condition. With the increase of the number of fiber rows and the inlet velocity,Nu decreases less after the addition of slip boundary condition. When the fiber bundle diameter (d) is 20 μm,the number of rows is less than 5 rows,and the center distance exceeds 3 d,the decrease percentage of Nu with the slip boundary condition is more than 1%. The influence of slip flow area cannot be ignored in numerical simulation.

TK16