摘要：Orifice discharge is a classical hydrodynamic phenomenon. The experiments of liquid free jets through vertical sharp-edged orifices were conducted on the influences of orifice geometry and liquid depth. The flow mechanism indicates that the higher energy loss of thin-walled orifice is caused by the inspired air annulus inside orifice channel which will lead to the Rayleigh-Taylor instability. The theoretical derivation further demonstrated that the consecutive collisions between main stream and surface waves can cause significant energy dissipation. Besides, a kind of transition orifice was found for the first time: the increase of liquid depth can induce a sudden switch from the thick-walled orifice mechanism to the thin-walled one. The presentation in this work on the formation and development of coherent structures, the migration and bursting of vortexes, as well as the interaction between vortexes and free interface, is universal for revealing the essential features of multi-phase flow in form friction. ? 2022 Institution of Chemical Engineers

ISSN号：0263-8762

卷、期、页：v 190,p282-295

发表日期：2023-02-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：三区

收录情况：EI（工程索引）

发表期刊名称：Chemical Engineering Research and Design

通讯作者：钟帆,梅馨元,宫汝景

第一作者：曹睿,刘艳升,段爱军

论文类型：期刊论文

论文概要：曹睿,钟帆,刘艳升,段爱军,梅馨元,宫汝景，Mechanical energy loss and Rayleigh-Taylor instability in free discharge of vertical sharp-edged orifices，Chemical Engineering Research and Design，2023，v 190,p282-295

论文题目：Mechanical energy loss and Rayleigh-Taylor instability in free discharge of vertical sharp-edged orifices