Effect of Impeller Geometry and Tongue Shape on the Flow Field of Cross Flow Fans

作     者：M.Govardhan G.Venkateswarlu 

作者机构：Department of Mechanical EngineeringIndian Institute of Technology MadrasChennai 600 036IndiaDepartment of Mechanical EngineeringIndian Institute of Technology MadrasChennai 600 036India 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2003年第12卷第2期

页      面：118-125页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

主　　题：Impeller tongue circumferential position flow coefficient eccentric vortex total pressure coefficient static pressure coefficient. 

摘      要：Experiments were conducted to investigate the effect of impeller geometry and tongue shape on the flow field of cross flow *** impellers(Ⅰ，Ⅱ，Ⅲ）having same outer diameter,but different radius ratio and blade angles were employed for the *** impeller was tested with two tongue *** survey was carried out for each impeller and tongue shape at two flow *** for each flow coefficient at different circumferential *** flow is two-dimensional along the blade span except near the *** total pressure developed by the impellers in each case is found to be maximum at a circumferential position of around 270°.The total and static pressures at the inlet of impellers are more or less same regardless of impeller and tongue geometry,but they vary considerably at exit of the *** Ⅲ with tongue T2 develops higher total pressure and efficiency where as impeller Ⅱ with tongue T2 develops minimum total *** diffusion and smaller vortex size are the reasons for better performance of impeller Ⅲwith tongue T2。