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CLC number: TK31

On-line Access: 2013-04-30

Received: 2012-09-13

Revision Accepted: 2013-02-17

Crosschecked: 2013-04-19

Cited: 3

Clicked: 4148

Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2013 Vol.14 No.5 P.377-382

http://doi.org/10.1631/jzus.A1200233


Fundamental research on the size and velocity measurements of coal powder by trajectory imaging*


Author(s):  Xue-cheng Wu1, Ying-chun Wu1, Cong-chang Zhang1, Guo-neng Li2, Qun-xing Huang1, Ling-hong Chen1, Kun-zan Qiu1, Hao Zhou1, Ke-fa Cen1

Affiliation(s):  1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   qiukz@zju.edu.cn

Key Words:  Trajectory imaging, Velocity measurement, Size measurement, Coal powder


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Xue-cheng Wu, Ying-chun Wu, Cong-chang Zhang, Guo-neng Li, Qun-xing Huang, Ling-hong Chen, Kun-zan Qiu, Hao Zhou, Ke-fa Cen. Fundamental research on the size and velocity measurements of coal powder by trajectory imaging[J]. Journal of Zhejiang University Science A, 2013, 14(5): 377-382.

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author="Xue-cheng Wu, Ying-chun Wu, Cong-chang Zhang, Guo-neng Li, Qun-xing Huang, Ling-hong Chen, Kun-zan Qiu, Hao Zhou, Ke-fa Cen",
journal="Journal of Zhejiang University Science A",
volume="14",
number="5",
pages="377-382",
year="2013",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1200233"
}

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%A Xue-cheng Wu
%A Ying-chun Wu
%A Cong-chang Zhang
%A Guo-neng Li
%A Qun-xing Huang
%A Ling-hong Chen
%A Kun-zan Qiu
%A Hao Zhou
%A Ke-fa Cen
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%P 377-382
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1200233

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T1 - Fundamental research on the size and velocity measurements of coal powder by trajectory imaging
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A1 - Ying-chun Wu
A1 - Cong-chang Zhang
A1 - Guo-neng Li
A1 - Qun-xing Huang
A1 - Ling-hong Chen
A1 - Kun-zan Qiu
A1 - Hao Zhou
A1 - Ke-fa Cen
J0 - Journal of Zhejiang University Science A
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SP - 377
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DOI - 10.1631/jzus.A1200233


Abstract: 
A trajectory imaging based method for measuring the velocity and diameter of coal particles was presented. By using an industrial charge-coupled device (CCD) camera and a low power semiconductor laser, the images of coal particles under relatively long exposure time were recorded and then processed to yield both the velocities and sizes. Fundamental research on this method with special attention to recording parameters, e.g., magnification factor and exposure time, was carried out. For most of the test cases, the results agree with those obtained by particle image velocimetry (PIV) and shadow imaging method. Measurements with good accuracy can be obtained when the imaging magnification factor and exposure time are set appropriately, making N be larger than 3.5, and R between 5–7, where N and R are the number of pixels occupied by the average width and the ratio of length to width of particle trajectory on the image, respectively. The work indicates the feasibility and potential application of the present measurement method for online measurement of coal powder in pipes in industrial power plants.

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