摘要
利用高速气流对物体进行射流冲击,使其快速冻结的设备被称为冲击式速冻设备。其中,设备的喷嘴结构是决定冻结区内流场的重要因素之一,影响着物体与周围环境的传热。文章从冲击式速冻设备喷嘴结构出发,阐述了喷嘴的倾斜角度、排列布置以及形状对冲击式速冻设备内部气流流动和换热特性的影响。板间距与喷嘴直径比(H/d)以及流体雷诺数(Red)对喷嘴倾斜角度和平均努塞尔数之间的关系起到了决定性作用;此外,喷嘴的不同形状以及不同排列方式对系统内部气流组织也有着很大的影响。
The equipment that impinges the object with high velocity airflow and freezes it quickly is called impingement quick freezing e quipment. The nozzle form of the equipment is one of the important factors to determine the flow field in the freezing zone, which affects the heat transfer characteristics between the object and the surround ing environment. Based on the nozzle structure of the impingement quick freezing equipment, the influence of the inclined angle, ar- rangement and shape of the nozzle on the heat transfer characteristics of the flow field in the impingement quick freezing equipment is discussed in this paper. Find that the nozzle to-plate spacing（H/d）and the Reynolds numbers of the fluid play a decisive role in the relation ship between the nozzle inclination angle and the average Nusselt numbers. In addition, the different shapes and arrangement of the nozzles also have a great influence on the airflow organization in the system.
作者
舒志涛
谢晶
杨大章
SHU Zhi-tao;XIE Jing;YANG Da-zhang(Shanghai Engineering Research Center of Aquatic Product Processing fl~ Preservation,.Shanghai 201306,China;Shanghai Professional Technology Service Platform on Cold Chain Equipment Perfbrmance and Energy Saving Evaluation,Shanghai 201306,China;National Experimental Teaching Demonstration Center for Food Science and Engineering ,Shanghai 201306,China 4.College of Food Science and Technology,Shanghai Ocean University,Shanghai 201306,China)
出处
《食品与机械》
CSCD
北大核心
2018年第6期187-191,共5页
Food and Machinery
基金
国家“十三五”重点研发项目(编号：2016YFD0400303)
上海高校青年教师培养资助计划(编号：ZZSHOU16013)
上海海洋大学科技发展专项基金(编号：A2-020317100207)
上海海洋大学博士科研启动基金(编号：A2-020317-100317)
关键词
冲击式
速冻设备
喷嘴
换热特性
impingement quick freezing equipment
nozzle shape
heattransfer characteristics
influence law
