压力式螺旋型喷嘴二次雾化特性的试验研究
发布时间：2019-05-24 03:24
【摘要】：空气与液滴之间良好的接触是增湿室增湿换热的关键技术,因此有必要对喷嘴进行雾化特性试验研究。该研究选用工程上常用的压力式螺旋型喷嘴TF6进行雾化特性试验,TF6喷嘴雾化特性的研究包括喷嘴背压对雾化液滴尺寸的影响,分析距离TF6喷嘴下方不同位置各种液滴直径、比表面积、分布跨度值的变化。研究发现,雾化液滴的直径随喷雾压力的增大而减小,但喷雾压力有其临界范围。通过对距离喷嘴下方不同位置雾化特性的分析得到二次雾化的发生位置,该位置更有利于空气与液滴的热质交换。在二次雾化区内,利用最小二乘法拟合出喷嘴雾化液滴的经验关联式,整理成韦伯数和雷诺数的函数关系,可用来预测喷嘴出口粒子的直径。
[Abstract]:Good contact between air and droplets is the key technology of humidification and heat transfer in humidifying chamber, so it is necessary to study the atomization characteristics of nozzles. In this study, the pressure spiral nozzle TF6, which is commonly used in engineering, is used to carry out the atomization characteristic test. The atomization characteristics of TF6 nozzle include the influence of nozzle back pressure on the atomization droplet size, and the analysis of various droplet diameters at different positions below the TF6 nozzle. The change of specific surface area and distribution span. It is found that the diameter of atomized droplets decreases with the increase of spray pressure, but the spray pressure has its critical range. Through the analysis of the atomization characteristics at different positions below the nozzle, the occurrence position of secondary atomization is obtained, which is more beneficial to the heat and mass exchange between air and droplets. In the secondary atomization zone, the empirical correlation of nozzle atomization droplets is fitted by least square method, and the functional relationship between Weber number and Reynolds number is sorted out, which can be used to predict the diameter of nozzle outlet particles.
【作者单位】： 南京工程学院能源与动力工程学院;同济大学暖通空调及燃气研究所;
【基金】：国家自然科学基金资助项目(51408302) 南京工程学院校基金资助项目(YKJ201406)
【分类号】：O35
本文编号：2484509
[Abstract]:Good contact between air and droplets is the key technology of humidification and heat transfer in humidifying chamber, so it is necessary to study the atomization characteristics of nozzles. In this study, the pressure spiral nozzle TF6, which is commonly used in engineering, is used to carry out the atomization characteristic test. The atomization characteristics of TF6 nozzle include the influence of nozzle back pressure on the atomization droplet size, and the analysis of various droplet diameters at different positions below the TF6 nozzle. The change of specific surface area and distribution span. It is found that the diameter of atomized droplets decreases with the increase of spray pressure, but the spray pressure has its critical range. Through the analysis of the atomization characteristics at different positions below the nozzle, the occurrence position of secondary atomization is obtained, which is more beneficial to the heat and mass exchange between air and droplets. In the secondary atomization zone, the empirical correlation of nozzle atomization droplets is fitted by least square method, and the functional relationship between Weber number and Reynolds number is sorted out, which can be used to predict the diameter of nozzle outlet particles.
【作者单位】： 南京工程学院能源与动力工程学院;同济大学暖通空调及燃气研究所;
【基金】：国家自然科学基金资助项目(51408302) 南京工程学院校基金资助项目(YKJ201406)
【分类号】：O35
【相似文献】
相关期刊论文 前3条
1 刘联胜,吴晋湘,傅茂林,王恩宇;气泡雾化喷嘴雾化特性实验[J];燃烧科学与技术;2001年01期
2 师照峰;王德俊;;疲劳剩余损伤规律分析及其试验验证[J];机械强度;1988年04期
3 李生娟,毕明树,丁信伟;可燃气云爆炸的试验研究现状及发展趋势[J];化学工业与工程;2003年03期
相关硕士学位论文 前1条
1 郭无双;基于激光测量技术的喷雾雾化特性研究[D];浙江大学;2017年
，本文编号：2484509
本文链接：https://www.wllwen.com/kejilunwen/lxlw/2484509.html
