摘要
为探明冲击式速冻机中送风孔板对鱼体冻结效率的影响,以小黄鱼为研究对象,通过数值模拟和试验验证,研究了送风孔板的排布方式、送风孔板孔径和鱼体中心距上下送风孔板的距离对鱼体冻结效率的影响,分析了不同送风孔板排布方式、送风孔板孔径及送风距离下鱼体的温度分布及中心温度变化情况。结果显示:上下送风孔板交错排布避免了两侧风的对冲损耗,使得冻结速率最高、冻结时间最短;送风孔板孔径的增加有效减小了第二阶段的鱼体冻结和第三阶段的鱼体降温时间;上下孔板距鱼体中心的距离越短,冻结时间越短。研究表明:筛选出适宜的送风孔板结构和参数,可为水产品冷冻提供新的工艺指导,为冲击式速冻机的优化设计提供技术参考。
To investigate the influence of the orifice plate on the freezing efficiency of fish in the impingement blast freezer,this paper takes yellow croaker as the research object,analyzes the effects of different orifice plate arrangements,hole diameter and air supply distance on the freezing efficiency of fish,and obtains the fish temperature distribution and the evolution of central temperature with time.The results demonstrate that the staggered arrangement of the upper and lower orifice plates avoids wind hedging,so the freezing rate is the highest and the freezing time is the shortest.Increasing of the orifice plate diameter effectively reduces the fish freezing time in the second stage and the cooling time in the third stage.The shorter the distance between the upper and lower orifice plates from the center of the fish body,the shorter the fish freezing time.The study shows that:screening the structure and parameters of the air supply orifice plate with suitable purpose can provide new process guidance for the freezing of aquatic products and provide technical support for the optimal design of the impact freezer.
作者
欧阳杰
沈建
郭文华
孙鑫宇
赵日晶
黄东
OUYANG Jie;SHEN Jian;GUO Wenhua;SUN Xinyu;ZHAO Rijing;HUANG Dong(Fishery Machinery and Instrument Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200092,China;School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shanxi,China;Collaborative Innovation Center of Seafood Deep Processing,Dalian Polytechnic University,Dalian 116034,Liaoning,China)
出处
《渔业现代化》
CSCD
2023年第4期21-29,共9页
Fishery Modernization
基金
国家重点研发计划项目(2019YFD0901802)。
关键词
送风孔板
冻结特性
冲击式速冻
数值模拟
小黄鱼
水产品加工
orifice plate
freezing characteristics
impingement quick-freezing freezer
numerical simulation
yellow croaker
aquatic product processing
