In order to study the transient flow characteristics of the solid-liquid two-phase flow in rotor-stator cascades,a centrifugal pump with radial diffusers was chosen as the object of study and its model was established. The structured grid was finished and the three dimensional flow field was simulated based on the mixture multiphase model, the detached eddy simulation model and the user defined function. The internal transient flow was analyzed. The results obtained show that the area of minimum pressure located at the inlet of blade suction side becomes wide during the transition process. Simultaneously, the area of the highest pressure which is at the blade pressure side and near the impeller tip becomes shrinking. The vortexes in the channel of the rotor cascades evolves constantly and vortexes are formed gradually at the inlet of the rotor blade because of the turbulence intensity as the flow rate becomes larger. The solid-phase deposits at the outlet of the stator cascades easily at small flow rates. With the flow rate increases, the global volume fraction of solid-phase decreases and its distribution becomes homogeneous on the meridian middle streamline of the rotor cascades.
HAN Wei,YUE Ting,LI Ren-Nian et al. Numerical analysis of transition process of solid-liquid two-phase in rotor-stator cascades[J]. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(2): 111-115.
Khelladi S, Kouidri S, Bakir F, et al. Predicting tonal noise from a high rotational speed centrifugal fan[J].Journal of Sound and Vibration, 2008, 313(1/2): 113-133.
Wang Xiuli,Yuan Shouqi,Zhu Rongsheng,et al. Tran-sient hydraulic characteristics of a centrifugal pump under variable working conditions[J]. Journal of Vibration and Shock,2012,31(24):48-53.(in Chinese)
Wolfram D, Carolus T H. Experimental and numerical investigation of the unsteady flow field and tone generation in an isolated centrifugal fan impeller[J].Journal of Sound and Vibration,2010,329(21):4380-4397.
Pei Ji, Yuan Shouqi, Yuan Jianping, et al. The influence of the flow rate on periodic flow unsteadiness behaviors in a sewage centrifugal pump[J]. Journal of Hydrodynamics,2013,25(5):702-709.
Feng J,Benra F K,Dohmen H J. Unsteady flow visua-lization at part-load conditions of a radial diffuser pump: By PIV and CFD[J]. Journal of Visualization,2009,12(1):65-72.
Yuan Shouqi, Xue Fei, Yuan Jiangping, et al. Experimental study on impact of pressure fluctuation on flow-noise in centrifugal pump[J]. Drainage and Irrigation Machinery, 2009,27(5):287-290.(in Chinese)
Shigemitsu T,Fukutomi J,Kaji K, et al. Unsteady internal flow conditions of mini-centrifugal pump with splitter blades[J]. Journal of Thermal Science, 2013, 22(1):86-91.
Tan Minggao, Wang Yong, Liu Houlin, et al.Effects of number of blades on flow induced vibration and noise of centrifugal pumps[J].Journal of Drainage and Irrigation Machinery Engineering,2012,30(2):131-135.(in Chinese)
Liu Houlin,Wang Kai,Kimhy Youngbum, et al. Experimental investigation of the unsteady flow in a double-blade centrifugal pump impeller[J]. Science China:Technological Sciences,2013,56(4):812-817.
Liu Houlin, Wang Yong, Yuan Shouqi, et al.Effects of impeller outlet width on the vibration and noise from centrifugal pumps induced by flow[J].J Huazhong Univ of Sci & Tech: Natural Science Edition,2012,40(1):123-127.(in Chinese)
Wang Yong, Liu Houlin, Yuan Shouqi, et al. Characteristics of cavitation vibration and noise in centrifugal pumps with different vane wrap angles[J]. Journal of Drainage and Irrigation Machinery Engineering,2013,31(5):390-393.(in Chinese)
Lighthill M J. On sound generated aerodynamically: I.General theory[C]//Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1952, 211(1107):564-587.
Tan Minggao,Yuan Shouqi,Liu Houlin, et al. Numerical research on performance prediction for centrifugal pumps[J]. Chinese Journal of Mechanical Engineering,2010,23(1):21-26.
Zhang Yuliang,Li Yi,Cui Baoling,et al. Numerical si-mulation and analysis of solid-liquid two-phase flow in centrifugal pump[J]. Chinese Journal of Mechanical Engineering, 2013,26(1):53-60.
Wang Yong,Liu Qing,Liu Dongxi,et al.Analysis of flow induced vibration and noise in centrifugal pumps with different blade inlet incidence angle[J].Fluid Machi-nery,2013,41(7):1-4.(in Chinese)
Zhu Zuchao,Guo Xiaomei,Cui Baoling,et al. External characteristics and internal flow features of a centrifugal pump during rapid startup[J]. Chinese Journal of Mechanical Engineering,2011,24(5):798-804.
Li Rennian,Liu Dianxing,Dong Zhiqiang, et al. Nume-rical analysis of flow in pump-turbine operating in S-shape region[J]. Journal of Drainage and Irrigation Machinery Engineering,2013,31(5):401-405.(in Chinese)