Effect of working fluid temperature on flow characteristics of jet cavitation reactor  

作　　者：Jinlan Gou Qi Xiao Zhenhai Zou Bangming Li 

机构地区：[1]State Key Laboratory of Marine Thermal Energy and Power,Wuhan 430205,Hubei Province,People’s Republic of China [2]Wuhan Second Ship Design and Research Institute,Wuhan 430205,Hubei Province,People’s Republic of China

出　　处：《International Journal of Fluid Engineering》2024年第4期110-124,共15页国际流体工程(英文)

摘　　要：The huge amount of energy generated by cavitation in liquids can be used to achieve more ecologically friendly and efficient removal of algae.Jet pumps readily induce cavitation owing to their tapering section structure and thus have the potential to be used as jet cavitation reactors(JCRs)to achieve hydrodynamic cavitation and algal removal under suitable pressure conditions.In this paper,we examine the cavitation characteristics of a JCR at different working fluid temperatures,using large eddy simulation.The vortex structure created by high-speed jets at the nozzle of the JCR is continuous and orderly,whereas the downstream vortex structure becomes chaotic and fragmented under the actions of flow mixing and bubble development.An increase in water temperature can reduce vorticity.As the water temperature rises,the cavitation number decreases,the total cavity volume increases,and cavitation changes from an unstable to a stable limit state.When cavitation is in its unstable limit state,the total bubble volume exhibits quasi-periodic changes and the cavitation cloud pulsates strongly,while when cavitation is in its stable limit state,cavitation cloud pulsation is seen only at the outlet.

关 键 词：CAVITATION UNSTABLE CHARACTERISTICS 

分 类 号：X52[环境科学与工程—环境工程]