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中文摘要：
采用基于动网格方法的有限体积法对圆柱和直桨叶突然启动引起的二维非定常不可压粘性流进行了数值模拟，给出了计算方法。通过计算得到了Re=5000和9500时圆柱突然启动后的流场随时间演化的非定常过程。将计算结果与实验结果进行了对比，两者吻合较好；采用大涡模拟对高雷诺数下的直桨叶突然旋转启动的流场进行了计算，得到了完成启动后叶片内部瞬态流场的分布结果。
英文摘要：
Two-dimensional unsteady incompressible viscous flow past an impulsively started circular cylinder and straight blade were studied numerically using the finite volume method based on the dynamic mesh method. The computational method was given. The obtained unsteady flow evolutions after the starting of the cylinder for the Reynolds numbers equal to 5000 and 9500 are given. The agreement between computational results and experimental visualizations is found to be satisfactory The transient flow of high Reynolds number around an impulsively started straight blade was carried out using the large eddy simulation （LES） method. The computational instantaneous flow configurations were given after the starting of the blades.
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