本文研究了基于单帧单曝光图像的颗粒多参数测量方法,以同时测量包括颗粒相的粒径、速度、浓度和流量等直接反映颗粒相流动特征的参数.由于镜头景深有限,不在景深范围内的颗粒成像将出现离焦模糊现象,且不同粒径大小的颗粒在同一位置被识别的精度不同,因此需要在现有的单帧单曝光法基础上,对拍摄到的模糊颗粒图像进行粒度修正,以获得颗粒的真实粒径和其它参数.采用背光照明方式对8 mm×8 mm方管内水-A12O3颗粒两相流动过程进行图像法测量,对基于模糊图像处理的颗粒相多参数测量方法进行了验证.
参考文献
| [1] | W. A. S. Kumara;G. Elseth;B. M. Halvorsen;M. C. Melaaen .Comparison of Particle Image Velocimetry and Laser Doppler Anemometry measurement methods applied to the oil-water flow in horizontal pipe[J].Flow Measurement and Instrumentation,2010(2):105-117. |
| [2] | Hadad, T.;Gurka, R..Effects of particle size, concentration and surface coating on turbulent flow properties obtained using PIV/PTV[J].Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics,2013:203-212. |
| [3] | Kundur D.;Hatzinakos D. .Blind image deconvolution[J].IEEE Signal Processing Magazine,1996(3):43-64. |
| [4] | G. Castanet;P. Dunand;O. Caballina;F. Lemoine .High-speed shadow imagery to characterize the size and velocity of the secondary droplets produced by drop impacts onto a heated surface[J].Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow,2013(3):1489-1-1489-17. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%