基于CFD数值模拟的蒸汽喷射器结构研究.pdf

ww. urutu
化工进展
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS2013年第32卷第12期
cesececeseパ
研究开发
基于CFD数值模拟的蒸汽喷射器结构硏究
王立慧,赵龙,张学建,张裕中
(江南大学食品装备工程研究中心,江苏无锡214122)
摘要:比较分析了管式换热器、板式换热器和刮板式换热器的应用及区别,对用于高黏稠物料蒸煮杀菌的蒸
汽喷射装置的原理及应用进行了探讨。基于计算流体动力学( computational fluid dynamics,CFD)的数值模拟方
法对不同结构蒸汽喷射装置的速度场、温度场和压力场分布情况进行研究。结果表明,螺旋爭柱结构对蒸汽喷
射器内部速度、温度场分布有较大影响,螺旋导柱位于混合区中闯时喷射器内部温度、速度分布情况优于其位
于混合区内部和外部时,蒸汽喷射孔的位置分布对消除原有蒸汽喷射器内部“死区”有明显作用,解决“死区”问题
会导致物料流泵送功率有少量增加,但喷射器效率提升相比泵送功率増加更具有实用意义。研究结果为进一步
改进蒸汽喷射器结构和提升喷射器的工作效率可提供必要的理论依据
关键词:蒸汽喷射器;螺旋导柱;数値模拟;杀菌
中图分类号:TK172
文献标志码
文章编号:1000-6613(2013)12-2852-07
DOI:10.39695jisn.1000-6613.2013,12.011
Research on structure of steam injector based on CFD numerical
simulation
WANG Lihui, ZHAO Long, ZHANG Xuejian, ZHANG Yuzhong
Research Center of Food Equipment, Jiangnan University, Wuxi 214122, Jiangsu, China
Abstract: This paper discussed the applications of paper tube heat exchanger, plate heat exchanger and
scraping plate heat exchanger, in order to explore the principles and applications of steam jet device in
thermal sterilization for high viscous materials. The velocity field, temperature field and stress field in
different steam jet devices were analyzed using Computational Fluid Dynamics(CFD )numerical
simulation method. The results showed that the helical guide pillar had a big confluence on the
distribution of the velocity field and temperature field in the steam injector. The velocity field and
temperature field would have a bctter distribution when the helical guide pillar was in the center of the
dilution zone. Changing the location of the spray-hole was visible to eliminate the dead zone" in the
customary steam injector. The resolving of dead zone will lead to a little increase in transporting power
of pump, but the improvement of jet efficiency was more significant than the increase in transporting
power of pump. The results could provide necessary theoretical steam injector structure and ejector
efficiency improvement
Key words: steam injector; the helical guide pillar; numerical simulation: sterilization
进入21世纪以来,随着消费意识增强和消费温瞬时灭菌(UHT)装置有板式换热器、管式换热
水平的提高,人们对食品质量与食品安全也有了更收稿日期:2013062:修改稿日:201
高的要求。食品安全是食品科学研究与食品生产中基金项目:江苏省科技型创新资金项目(BC2010031)
关注的重要问题。热力杀菌技术ー直是一种最为重
第一作者:王立慧(1987-),男,硕士研究生,研究方向为食品加工
装备技术。 E-mail sunwanglihui(@163com。联系人:张裕中,教授
要的食品安全控制技术。工业化生产中常见的超高主要从事食品装备技术方面的研究。E。mna309om