基于Mie散射理论的水滴平均直径测量

常士楠; 管章杰; 王超; 庄伟亮

基于Mie散射理论的水滴平均直径测量

北京航空航天大学航空科学与工程学院, 北京 100191

基金项目: 国家自然科学基金资助项目(11072019)

详细信息

作者简介:
常士楠(1968-),女,山西榆次人,教授,sn_chang@buaa.edu.cn.

中图分类号: V219
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- 文章访问数: 1515
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- 被引次数: 0
出版历程
- 收稿日期: 2012-09-26
- 网络出版日期: 2013-09-30

Application of Mie-scattering theory in measurement of mean droplet diameter

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 冰风洞实验时,为了更精确地模拟实验环境,需要精确测量喷头喷出水滴的直径,为此,开发了一套激光束发射装置并基于Mie散射理论编制了水滴直径计算程序.在水滴流场的环境中,激光束发生散射,间隔Δt的时间反复实验获得多个时刻的散射光强分布图.应用自行开发的计算程序对已获得的多组散射光强分布图进行计算处理,得到同一截面不同时刻的多组水滴平均直径.利用Newton插值法对上述多组水滴平均直径进行插值,拟合出不同时刻水滴直径的连续变化曲线,对该曲线求积分平均值,获得该截面水滴的平均直径.为检验实验装置和计算程序的准确性,对某加湿器喷水系统进行实验测量,测量结果与产品说明中提供的数据吻合良好,表明该测量装置和计算程序可行.
- 冰风洞 /
- 水滴直径 /
- Mie散射理论 /
- 测量
Abstract: In an ice wind tunnel experiment, in order to simulate the experimental environment more accurately, the diameter of droplets jetted from the nozzle need to be measured accurately accordingly. A set of laser device and drop diameter calculation program based on Mie-scattering theory were developed. In the environment of droplet flow field, the laser beam became scattered, experiments were repeated to obtain multiple moments of the scattering intensity distribution figures in interval of. The calculation program developed was applied to calculate the scatter intensity distribution of the figures. The mean diameters of water droplets in the same section but at different time were obtained. The Newton interpolation method was applied to interpose the data of multiple sets of the mean droplet diameters and based on the curves obtained by fitting the diameter data of the cross at different time, the average value of the integration which was considered to be the mean droplet diameter would be obtained. A humidifier was used to investigate the feasibility of the code. Good agreement between the prediction and the data provided by the product description show that the measurement device and calculation program is feasible.
- icing wind tunnel /
- droplet diameter /
- Mie-scattering theory /
- measurement

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[1] Lawson J R,Walton W D,Evans D D.Measurement of droplet size in sprinkler sprays[R].NBSIR 88-3715,1988 [2] Prosperetti A,Oguz H N.The impact of drops on liquid surfaces and the underwater noise of rain[J].Anual Review of Fluid Mechanics,1993,25(1):577-602 [3] Villermaux E, Bassa B.Single drop fragmentation distribution of raindrops[J].Nature Physics,2009(5):697-702 [4] Fan Xueliang,Jia Zhihai,Zhang Jingjing,et al.A video probe measurement system for coarse water droplets in LP steam trubine[J].Journal of Physics,2009,147(1) [5] Liu Z,Kim A.A review of water mist fire suppression systems—fundamental studies[J].Journal of Fire Protection Engineering,1999,10(3):32-50 [6] 李修亁,洪延姬,何国强,等.水滴激光辐照效应研究现状[J].激光杂志,2007,28(4):70-72 Li Xiuqian,Hong Yanji,He Guoqiang,et al.Status of study on the effect of laster radiation to water droplet[J].Laser Journal,2007,28(4):70-72(in Chinese) [7] 汪继文,陆和军,张妍妍.基于粒子系统的水滴溅落模拟[J].科学技术与工程,2010,10(6):1547-1550 Wang Jiwen,Lu Hejun,Zhang Yanyan.Water droplet splashign down simulation based on particle system[J].Science Technology and Engineering,2010,10(6):1547-1550(in Chinese)[8] 陈养喟.天然水体中激光衰减的现场测量[J].舰船科学技术,2000(1):3-7 Chen Yangkui.Field measurements of laser aattenuation in natural waters[J].Ship Science and Technology,2000(1):3-7(in Chinese) [9] Toyoaki Tanaka.The method for measuring water droplets by means of polyvinyl alcohol film[J].Meteorological Research Institute,1972,23(4):287-306 [10] Vivekananda J,Zhang G,Politovich M K.Estimation of cloud droplet size and liquid water content using dual-wavelength radar measurements[C]//Transactions on Geoscience and Remote sensing.Extremadura:IEEE,2000:1813-1816 [11] Zama Y,Kawahashi M,Hirahara H.Development of simultaneous measurement of droplet size and 3D velocity in spray[R].2003 [12] 王君,何俊发.简易Mie散射数值计算方法的研究[J].应用光学,2005, 26(4) :13-16 Wang Jun,He Junfa.The implementation of straightforward Mie scattering numerical calculation[J].Applied Optics,2005,26(4):13-16(in Chinese) [13] 沈建琪,刘蕾.经典Mie散射的数值计算方法改进[J].中国粉体技术,2005,11(4):1-5 Shen Jianqi,Liu Lei.An improved algotithm of classical Mie scattering calculation[J].China Powder Science and Technology,2005,11(4):1-5(in Chinese) [14] 黄竹青,杨继明,孙春生,等.激光散射理论在汽轮机蒸汽湿度及水滴直径测量中的应用[J].动力工程学报,2006, 26(2) :241-04(in Chinese) Huang Zhuqing,Yang Jiming,Sun Chunsheng,et al.Application of the laser scattering theory for monitoring steam wetness and droplet size in steam turbines[J].Journal of Power Engineering,2006,26(2):241-04 [15] 黄竹清,曹小玲,杨继明,等.基于CCD的蒸汽湿度及水滴直径测量[J].光电工程,2010,37(4):39-43 Huang Zhuqing,Cao Xiaoling,Yang Jiming,et al.Application of CCD in mesauring steam moisture and droplet size[J].Opto-electronic Engineering,2010,37(4):39-43(in Chinese)

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