Isothermal flow past a blowing sphere
Isothermal flow past a blowing sphere
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经过吹球体的等温流
DOI：
10.1002/fld.1650050804
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发表时间：
1985
影响因子：
1.8
通讯作者：
D. Lever
中科院分区：
文献类型：
--
作者：
K. Cliffe;D. Lever
稳态，轴对称，等温，不可压缩流过去的球均匀吹出的表面进行了研究的雷诺数在1至100和表面速度高达10倍的自由流值。在球极坐标系的流函数速度公式的流量方程和方程求解的Galerkin有限元法。计算了由吹气引起的阻力系数的减少，并考虑了粘性和压力对阻力的影响。更详细地研究了雷诺数（1和40）的两个值的表面压力，表面涡度和流型的变化。特别注意的扰动流场远离球。
Steady, axisymmetric, isothermal, incompressible flow past a sphere with uniform blowing out of the surface is investigated for Reynolds numbers in the range 1 to 100 and surface velocities up to 10 times the free stream value. A stream-function-velocity formulation of the flow equations in spherical polar co-ordinates is used and the equations are solved by a Galerkin finite-element method. Reductions in the drag coefficients arising from blowing are computed and the effects on the viscous and pressure contributions to the drag considered. Changes in the surface pressure, surface vorticity and flow patterns for two values of the Reynolds number (1 and 40) are examined in greater detail. Particular attention is paid to the perturbation to the flow field far from the sphere.