冲洗式气体置换的流场分析及其结构优化  

Flow Field Analysis and Structure Optimization of Gas Flushing Replacement

作　　者：刘琳 卢立新 王利强 刘志刚 

机构地区：[1]江南大学,无锡214122 [2]中国包装总公司食品包装技术与安全重点实验室,无锡214122

出　　处：《包装工程》2009年第8期16-18,共3页Packaging Engineering

基　　金：教育部科学技术研究重点项目(108066);国家"863"高技术研究发展计划资助项目(2007AA100408)

摘　　要：结合现有气调包装装置气孔结构,采用RNG k-ξ湍流模型进行气流流场数值模拟,设置不同充气出射角度,建立其分析模型。分析充气孔出射角度对盒内气体置换率的影响,并利用气体流线图观察气流流动过程。研究获得出射角度对流动特性与气体置换效果的影响,并优化其充气孔角度,结果表明充气孔出射角度显著影响气流流动和盒内气体置换精度。According to the existing pore structure in modified atmosphere packaging machine, the RNG k-ξ turbulence model was used for the numerical simulation to analyze the gas flow field, at the different jet injection angles. Effect of the jet injection angles on the gas replacement rate was analyzed. Also, the gas flow field process was observed by using gas flow line graph. The influence of jet injection angle was studied to optimize the angle of filling pore. The result showed that jet injection angles have significant influence on the gas flow and the accuracy of gas replacement.

关 键 词：气体置换 气孔结构 湍流模型 气调包装 

分 类 号：TB486[一般工业技术—包装工程] S229.3[农业科学—农业机械化工程]