高压脉冲电场杀菌多物理场特性研究  

A performance study of multilevel physical field on pulsed electric fields

作　　者：颜文旭 张姗姗 公群 

机构地区：[1]江南大学轻工过程先进控制教育部重点实验室,江苏无锡214122

出　　处：《食品与机械》2016年第2期1-6,共6页Food and Machinery

基　　金：中央高校基本科研计划项目(编号:JUSRP51406A)

摘　　要：高压脉冲电场(pulsed electric fields,PEF)杀菌技术是当今备受关注的非热杀菌技术之一。处理室作为高压脉冲电场的重要组成单元,其主要功能是利用强电场力作用,在食品物料通过处理室时,使其中微生物的细胞结构在极短时间内遭到破坏,菌体死亡,从而达到杀菌效果。处理室中电场强度和温度分布是影响系统杀菌效果和食品质量的主要因素,通过对处理室内流体动力学与电场和温度场的耦合数值模拟对其进行有效解析。数值模拟的主要目的是优化处理室的几何结构,进而改善电场强度和温度分布的均匀性,从而避免局部食品物料的过处理、欠处理以及介质击穿等现象。文章总结数值模拟方法在高压脉冲电场性能研究中的应用,重点分析说明数值模拟方法在处理室内流体动力学、电场强度和温度场等方面的研究,并对该方法在高压脉冲电场应用中的进一步研究进行展望。Pulsed electric field sterilization technology is one of the main concerned non-thermal sterilization technologies.One of its key components is treatment chamber,when the food material went the treatment chamber,in a very short period of time microorganisms endured strong electric field force,the cell structure was destructed,so the cell died.The electric field strength and the temperature distribution in the treatment chamber is the main factor of affecting the system bactericidal effect and food quality,the numerical simulation of theuid dynamics coupled with the electric and thermaleld inside the treatment chamber can provide detailed analysis.The main purpose of the numerical simulation is optimizing the geometry of the treatment chamber,thereby improving the uniformity of the electric field intensity and the temperature distribution,so avoiding the phenomenon such as localized over-processed or less processing and dielectric breakdown.This article reviews numerical investigations performed on the pulsed electriceld process and presents numerical results of a treatment chamber optimization and the solution of coupleduid dynamical,electrical and thermal problems.

关 键 词：数值模拟 高压脉冲电场 处理室 

分 类 号：TS205.9[轻工技术与工程—食品科学]