Algorithm and experiment on droplet sizing based on DPIV
-
摘要:针对利用传统数字粒子图像测速(DPIV)法测量水雾粒径时粒子影像拉长对测试结果的影响,提出了基于DPIV建立的改进图像法(IIM)。设计了水雾粒径测量试验系统,对细水雾进行实时测试,并对比了采用本文算法与直接等效法测试水雾粒径子半径的差异。结果表明:采用本文的IIM得到的测试结果更为准确。通过最小二乘法对粒径分布进行拟合,发现对数正态分布函数和威布尔函数都可以较好地描述粒径分布。Abstract:When traditional Digital Particle Image Velocimetry(DPIV) is used to measure water spray particles, the elongated image from a common CCD will effect the measuring results. To eliminate the effect of the elongated image of water spray particles, an Improved Image Method(IIM) was built based on DPIV. An experiment system was designed to make a real-time test for the water spray, by which the difference of measured particle sizes obtained by the improved image method and the direct equal method was contrasted. The results show that the algorithm used in this paper is more available to measure the radius of water spray particle. The radius distribution curve is fitted by least square method, which shows that both the lognormal function and Weibull function can describe the radius distribution well.
-
[1] SUFHEER K P,PANDA R K. Digital image processing for determining drop sizes from irrigation spray nozzles[J].Agricultural Water Management,2000,45(2):159-167. [2] 李文凯,吴玉新,黄志民,等. 粒度分析和筛分法测粒径分布的比较[J]. 中国粉体技术,2007,13(5):10-14. LI W K,WU Y X,HUANG ZH M,et.al.. Measurement results comparison between laser particle analyzer and sieving method in particle size distribution[J].China Powder Science and Technology,2007,13(5):10-14.(in Chinese) [3] 杨粉荣,文洪杰,钟勤,等. 几种力度测试方法的比较[J]. 物理实验,2005,23(5):36-39. YANG F R,WEN H J,ZHONG Q,et.al.. Comparison of several measurement methods of particle size[J].Physics Examination and Testing,2005,23(5):36-39.(in Chinese) [4] 卢平,章名耀,陆勇,等. 利用PIV测量水煤雾化粒径的试验研究[J]. 东南大学学报 (自然科学版),2003,33(4):446-449. LU P,ZHANG M Y,LU Y,et.al.. Experimental study on particle size measurement of atomizing coal-water paste with PIV technology[J].J. Southeast University(Natural Science Edition),2003,33(4):446-449.(in Chinese) [5] 祁力钧,胡开群,莽璐,等. 基于图像处理的雾滴检测技术[J]. 农业机械学报,2009,40:48-51. QI L J,HU K Q,MANG L,et.al.. Droplet detection based on image processing[J].T. Chinese Society Agricultural Machinery,2009,40:48-51.(in Chinese) [6] 黄成杰,吴志军,李治龙,等. 粒子图像速度粒度同场测量基础与实验验证[J]. 吉林大学学报 (工学版),2010,40(4):1106-1111. HUANG CH J,WU ZH J,LI ZH L,et. al.. Fundamentals of particle velocity and size measurement in same field and its experimental validation[J].J. Jilin University(Engineering and Technology Edition),2010,40(4):1106-1111.(in Chinese) [7] WILLERT C E,GHARIBM M. Digital particle image velocimetry[J].Experiments in Fluids,1991,10:181-193. [8] 唐朝晖,刘金平,桂卫华,等. 基于数字图像处理的浮选泡沫速度特征提取及分析[J]. 中南大学学报 (自然科学版),2009,40(6):1618-1623. TANG ZH H,LIU J P,GUI W H,et al.. Froth bubbles speed characteristic extraction and analysis based on digital image processing[J].J. Central South University(Science and Technology),2009,40(6):1618-1623.(in Chinese) [9] 刘文洪,万甜,程文娟,等. 基于图像二值化处理的气泡羽流不稳定结构分析[J]. 水利学报,2009,40(11):1369-1373. LIU W H,WAN T,CHENG W J,et.al.. Analysis on steady structure of bubble plume in the basis of image binarization[J].J. Hydraulic Eng.,2009,40(11):1369-1373.(in Chinese) [10] 王喜世,伍小平,廖光煊,等. 扩展的DPIV方法及其在雾滴粒径测量中的应用 [J]. 科学通报,2002,47(4):260-264. WANG X SH,WU X P,LIAO G X,et al.. Extended DPIV method and the application on the spray droplets sizing[J].Chinese Sci. Bull.,2002,47(4):260-264.(in Chinese)
点击查看大图
计量
- 文章访问数:2391
- HTML全文浏览量:238
- PDF下载量:617
- 被引次数:0