Study on Characteristics of Liquid Flow Field in A^2/O Reactor Based on Laser Velocimetry

Jianjun Zhang ； Tao Zeng

《International Core Journal of Engineering》 7卷5期 (2021/05) Pp. 172-178

https://doi.org/10.6919/ICJE.202105_7(5).0022

摘要

In order to solve the problems of low accuracy and single measuring position in the current method for measuring the flow field characteristics of A^2/O reactor, a laser method for measuring the flow field characteristics of liquid phase in A^2/O reactor was proposed. The system of laser and CCD camera was used to capture the particle displacement in A^2/O reactor at different time periods. The camera divides the captured particle image into several zones, each of which generates the corresponding particle displacement vector. Then, the sub-pixel interpolation method is used to measure the particle velocity in A^2/O reactor to improve the measurement accuracy. The experimental results show that the proposed method can accurately measure the flow characteristics of the internal flow field in A^2/O reactor, and has the advantages of wide detection position, transient and high accuracy.

關鍵字

Laser Velocimetry ； A^2/O Reactor ； Liquid State ； Flow Field Characteristics

參考文獻

Liu Zijun, Cui Lishui, Xie Dailiang. Theoretical analysis and measurement of interference fringes of laser Doppler velocimeter [J]. China laser,2017,44(08):175-182.

DEEN N G. Two-phase PIV bubbly flows :status and trend[J].Experiments in Fluids,2002,25(1):97-101.

Chiu Sung Nok, Ling Leevan, McCourt Michael. On variable and random shape Gaussian interpolations [J]. Applied Mathematics and Computation,2019,377.

Li Yihuan, Zhang Huimin, Wang Yanhong. Application of different water treatment processes in sewage treatment plant [J]. Water treatment technology,2020,46(08):135-140.

Xia Bin, Sheng Xiaolin, Xu Feng. Effect of combined process of A2/O and constructed wetland on rural domestic sewage treatment in Yangtze River delta plain [J/OL]. Journal of Environmental Engineering:1-13[2020-11-08].