Effect of exterior cylinder slit wall on wavy vortex flow in gap of concentric cylinders
Zhu Fangneng1, Liu Dong1, Changqing2, Zhang Peng2, Yan Jianhua2
1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Technical and Research Center of Special Chemical Pump, Jingjiang, Jiangsu 214537, China
Abstract：Numerical simulations were implemented by using CFD to investigate the wavy vortex flow inside concentric cylindrical annulus. The reliability of numerical method was verified by the experimental results of PIV. The research focused on the distribution of flow field and the fluctuation characteristics of wavy vortex flow in the plain and slit wall models. By studying the velocity field of the circumferential plane for two different models, the size of Taylor vortex and the fluctuation amplitude in axial direction of wavy vortex were analyzed. By comparing the radial velocity distribution in R-Z plane in two different models, the influence of slit wall on jet outflow effect was discussed. Meanwhile, the flow characteristic and the secondary flow phenomena in the slit regions were discussed. The results show that: the existence of slit wall changed the distribution of flow field inside the annulus and the fluctuation characteristics in axial direction of wavy vortex. An obvious secondary flow phenomena in the slit regions promoted the fluid mixing and diffusion between the slit region and the annulus, intensified the instability of wavy vortex flow inside the annulus.
朱方能, 刘栋, 晁长青, 张鹏, 严建华. 外圆柱沟槽对环隙内波动涡流的影响[J]. 排灌机械工程学报, 2015, 33(6): 516-520.
Zhu Fangneng, Liu Dong, Chao Changqing,Zhang Peng, Yan Jianhua. Effect of exterior cylinder slit wall on wavy vortex flow in gap of concentric cylinders. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(6): 516-520.
[1]Taylor G I. Stability of a viscous liquid contained between two rotating cylinders[J]. Philosophical Transaction of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1923,223:289-343.[2]Andereck C D, Liu S S, Swinney H L. Flow regimes in a circular Couette system with independently rotating cylinders[J]. Journal of Fluid Mechanical, 1986,164: 155-183.[3]Ostilla R, Stevens R J A M, Grossmann S, et al. Optimal Taylor-Couette fow: Direct numerical simulations[J]. Journal of Fluid Mechanical, 2013,719: 14-46.[4]Liu D, Wang Y, Kim H B, et al. Slit wall effect on the stability of wavy vortex flow[J]. Advances in Mechanical Engineering, 2014: 853069.[5]周先桃,潘家祯,陈理清,等.湍流泰勒涡特性的数值模拟[J].华东理工大学学报:自然科学版,2006,32(5):617-622. Zhou Xiantao, Pan Jiazhen, Chen Liqing, et al. Numerical simulation of characteristics of turbulent Taylor vortex flow[J]. Journal of East China University of Science and Technology:Natural Science Edition,2006,32(5):617-622.(in Chinese)[6]Akonur A, Lueptow R M. Three-dimensional velocity field for wavy Taylor-Couette flow [J]. Physics of Fluids, 2003,15(4):947-960.[7]Roland K, Corneliu B. Transient dynamics of the wavy regime in Taylor-Couette geometry [J]. European Journal of Mechanics B/Fluids,2012, 31(1):158-167. [8]Wereley S T, Lueptow R M. Spatio-temporal character of non-wavy and wavy Taylor-Couette flow [J]. Journal of Fluid Mechanics, 1998, 364(1): 59-80.[9]Deng R, Yohanes A D, Ye C M. Taylor vortex flow in presence of internal baffles [J]. Chemical Engineering Science, 2010, 65(16): 4598-4605.[10]Lee S H, Chung H T, Park C W, et al. Experimental investigation of slit wall effects on Taylor-Couette flow [J]. Fluid Dynamics Research, 2009, 41(4):1-12.[11]刘栋,朱鹣,王颖泽,等. 沟槽壁面对泰勒涡流稳定性影响的数值模拟[J].排灌机械工程学报,2014,32(3):242-246. Liu Dong, Zhu Jian, Wang Yinze, et al. Numerical simulation of the slit wall effect on flow Taylor-Vortex flow stability[J]. Journal of Drainage and Irrigation Machinery Engineering,2014,32(3):242-246.(in Chinese)[12]Kim J S, Kim D H, Gu B, et al. Simulation of Taylor-Couette reactor for particle classification using CFD[J]. Journal of Crystal Growth, 2013, 373: 106-110.[13]欧特尔.普朗特流体力学基础[M].北京:科学出版社,2008.
