Bubbly shock propagation as a mechanism of shedding in separated cavitating flows  

作　　者：Harish Ganesh Simo A.Makiharju Steven L.Ceccio 

机构地区：[1]University of Michigan,Ann Arbor,USA [2]University of California,Berkeley,USA

出　　处：《Journal of Hydrodynamics》2017年第6期907-916,共10页水动力学研究与进展B辑（英文版）

基　　金：supported by the Office of Naval Research(Grant No.N00014-14-1-0292)under program manager Dr.Ki-Han Kim

摘　　要：Stable attached partial cavitation in separated flows can transition to cloud shedding, and the mechanism of transition has been attributed to the presence of a re-entrant liquid jet. Our findings have revealed the presence of propagating bubbly shock waves as an alternative dominant mechanism of shedding when the compressibility of the bubbly mixture is appreciable. In the present paper, we discuss dynamics associated with these bubbly shock waves, interaction of shock waves with obstacles in their path, and means to manipulate their properties to control the shedding process by non-condensable gas injection.Stable attached partial cavitation in separated flows can transition to cloud shedding, and the mechanism of transition has been attributed to the presence of a re-entrant liquid jet. Our findings have revealed the presence of propagating bubbly shock waves as an alternative dominant mechanism of shedding when the compressibility of the bubbly mixture is appreciable. In the present paper, we discuss dynamics associated with these bubbly shock waves, interaction of shock waves with obstacles in their path, and means to manipulate their properties to control the shedding process by non-condensable gas injection.

关 键 词：Partial cavitation bubbly shock waves cloud cavitation X-ray densitometry 

分 类 号：O35[理学—流体力学]