NUMERICAL SIMULATION OF CAVITATION FLOW IN TANDEM CASCADE
Complex cavitation phenomenon in tandem cascade is investigated numerically. Three-dimensional multi-block structural mesh, Finite volume method(FVM), Shear stress transport(SST) turbulence model are employed. Single phase interface tracking model is used as the cavitation model. Flow field without cavitation involved is firstly computed as the initial field for further cavitation flow simulation. Some results are obtained through the simulation:(1) the position where cavitation occurs is near the lowest hydrofoils upper surface and corresponds to the trailing edge of the middle foil; (2)cavitation zones profile is greatly influenced by solid boundary and rotary speed, the rear profile of the cavitation zone becomes coarser with shortened distance from the impeller hub; (3)with large rotary speed, the cavitation zones length vertical to the main flow gets larger and coupling between cavitation zone profile,and flow parameters proves to be more salient.
cavitation cavitation inception numerical simulation tandem cascade
Can Kang
School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
2214-2219
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）