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通过对附属轴向管的隔水管表面压力分布和流体动力特性进行的风洞和水洞实验测试结果的对比,验证了利用低成本风洞实验代替高成本水洞实验来考察隔水管流体动力特性及漩涡特征的可行性。与经典圆柱实验的对比验证了本实验两套测试系统的可靠性。对附加管数N 4和10两种布局的附属管进行流动控制实验的结果表明,4根和10根附属管分别作为少管数和多管数情况的代表,对于流体力的影响差异较大,但均能取得一定程度的降低升阻力和抑制漩涡脱落的效果。多管数对于来流方向的敏感性要低很多。10根管能使Cd和Cl分别获得相对于单隔水管约36%和80%的降低。附属管作为一种消除流向影响以降低流体力和控制漩涡脱落的手段,为抑制隔水管涡激振动提供了参考价值。
By comparing the experimental results of wind tunnel and water tunnel with the pressure distribution and hydrodynamic characteristics of the riser pipe attached to the axial pipe, it is verified that the low-cost wind tunnel experiment can replace the high-cost water tunnel experiment to investigate the hydrodynamic characteristics of the riser pipe And swirl characteristics of the feasibility. The comparison with the classical cylinder experiment verifies the reliability of the two test systems in this experiment. The results of the flow control experiments on the attached pipes with two additional layouts of N 4 and 10 show that the influence of four and ten subsidiary pipes on the minor and multi-pipe cases are different, , But can achieve a certain degree of resistance to lift and inhibit vortex shedding effect. Multi-tube flow direction for the sensitivity is much lower. 10 tubes enabled Cd and Cl to achieve approximately 36% and 80% reduction, respectively, relative to single risers. As a subsidiary pipe to eliminate the influence of flow to reduce the fluid force and control of vortex shedding means to restrain the vortex vibration riser provides a reference value.