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通过风洞测压与数值模拟研究了旋成体滚转过程。结果表明,侧向力的滚转角效应与模型加工精度有关;位于模型头部尖端一定量级的微扰动不仅能触发非对称,而且促使流场呈现Bistable状态。然而法向力无明显的滚转角效应。研究流场表明Bistable的左右两类涡系在结构上无明显差异,也并非完全的镜像状态。通过控制微扰动的周向位置可以获得期望的非对称多重涡流场。涡系诱导作用增强,对侧向力和法向力都有增值。
Through the wind tunnel pressure measurement and numerical simulation of the rotating body rolling process. The results show that the roll angle effect of lateral force is related to the precision of the model machining. The perturbation of a certain magnitude at the tip of model head can not only trigger the asymmetry, but also make the flow field appear Bistable. However, the normal force has no obvious roll angle effect. The study of flow field shows that there is no obvious difference in structure between the two left and right vortex systems of Bistable and it is not a complete mirror image. The desired asymmetric multiple vortex field can be obtained by controlling the perturbation’s circumferential position. Vortex system induction enhanced, both lateral force and normal force have added value.