中文摘要：

基于小变形假设,流体域采用有限体积法,固体域采用有限元法,对主直径为28mm的水力旋流器变径圆管内的耦合流场进行数值模拟研究。并对耦合条件与非耦合条件下的速度场、压力场和湍动能分布进行了对比分析,结果表明：耦合作用对变径圆管结构内流场的影响不能忽视,流体与结构的相互作用不但改变了流场分布,还改变了结构的运动特性,加快了流体能量的衰减。

英文摘要：

Basing on the hypothesis of small deformation, the fluid domain which using the finite volume method and the solid domain which employing the finite element method to simulate the coupling flow field in the 28-mm-diameter hydrocyclone with variable diameter pipe were implemented. Comparatively analyzing the velocity field, pressure field and tubulence energy distribution under coupling conditions shows that the influ- ence of coupling effect on flow field couldn＇ t be ignored; and the interaction of the fluid and structure can change flow field distribution and movement characteristics of the structure and can accelerate kinetic energy attenuation of the fluid.