Effect of nozzle geometry on pressure drop in submerged gas injection

作     者：XIAO Jun-bing YAN Hong-jie LIU Liu 肖俊兵;闫红杰;Markus SCHUBERT;Sebastian UNGER;刘柳;Eckhard SCHLEICHER;Uwe HAMPEL

作者机构：School of Energy Science and Engineering Central South University Changsha 410083 China Institute of Fluid Dynamics Helmholtz-Zentrum Dresden-Rossendorf Dresden 01328 Germany Chair of Imaging Techniques in Energy and Process Engineering Technische Universitat Dresden 01062 Germany 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2019年第26卷第8期

页      面：2068-2076页

核心收录：

学科分类：0810[工学-信息与通信工程] 080704[工学-流体机械及工程] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Project(51676211) supported by the National Natural Science Foundation of China Project(2017SK2253) supported by the Key R&D Plan of Hunan Province of China Project(2015zzts044) supported by Fundamental Research Funds for the Central Universities,China Project(201606370092) supported by the China Scholarship Council 

主　　题：submerged gas injection nozzle geometry hydraulic diameter pressure drop modified Euler number 

摘      要：Submerged gas injection into liquid leads to complex multiphase flow, in which nozzle geometries are crucial important for the operational expenditure in terms of pressure drop. The influence of the nozzle geometry on pressure drop between nozzle inlet and outlet has been experimentally studied for different gas flow rates and bath depths. Nozzles with circular, gear-like and four-leaf cross-sectional shape have been studied. The results indicate that, besides the hydraulic diameter of the outlet, the orifice area and the perimeter of the nozzle tip also play significant roles. For the same superficial gas velocity, the average pressure drop from the four-leaf-shaped geometry is the least. The influence of bath depth was found negligible. A correlation for the modified Euler number considering the pressure drop is proposed depending on nozzle geometric parameter and on the modified Froude number with the hydraulic diameter of the nozzle do as characteristic length.