Numerical Simulation of Flow in Rectangular Duct Considered Rotational Effect
The SST k-ω turbulence model based on the open-source CFD codes OpenFOAM is applied to calculate the fluid flow in the rotating rectangular duct. The rotation rates range from 0r/min to 2000r/min. The calculation results involve the distribution of velocity and secondary flows of the rotational flow field and the variation of boundary layer thickness with the rotation rates. The present numerical results are compared with the experimental and numerical data from available literatures. The comparison shows a well agreement. At the same time, the effects of Coriolis and centrifugal forces on the velocity, pressure and the development of boundary layers are analyzed according to the numerical results. The analysis result shows that the mainstream velocity in the duct rises with the increases of rotation rate and the profile of the velocity in y-direction becomes asymmetric which is different from that of static state. The velocity of the pressure-side rises while the velocity of suction-side decreases, so there appears the peak of velocity near the pressure-side. And the pressure-side boundary layers thinning while the opposite side boundary layers thickening with the rotation strengthen. The boundary layer of suction-side becomes separated when the rotation is strengthened to a high level.
rotation straight rectangular duct boundary layer OpenFOAM
Yu-Hui Ma Fu Tian Xiao-Fang Wang
School of Energy and Power Eng., Dalian Univ. of Technol., Dalian 116024, China
国际会议
The Third International Conference on Modelling and Simulation(第三届国际建模、计算、仿真、优化及其应用学术会议 ICMS 2010)
无锡
英文
247-250
2010-06-04（万方平台首次上网日期，不代表论文的发表时间）