滤除泰勒涡的同心环隙科特流临界雷诺数的实验确定

The Experimental Determination of the Critical Reynolds Number of the Couette Flow Between Two Concentric Cylinders in Which the Taylor Vortices are Filtrated

通过模拟实验对同心环隙科特流进行了研究.实验表明:滤除掉泰勒涡的影响后,在同心环隙科特流中,层流与紊流的相互过渡是在同一临界雷诺数上发生的,没有过渡区.临界雷诺数与泰勒涡没有直接联系.同时还表明,不同的压力梯度下有不同的临界雷诺数.

The Couette flow between two concentric cylinders is studied by imitation experiment.It is found that the transition of concentric circular Couette flow from laminar to turbulent or vice versa will happen at the same Reynolds number,i.e.,without transition zone,when Taylor vortices are filtrated;and the critical Reynolds number does not relate directly to Taylor vortices,but is different with different pressure gradients.