Holographic measurement of atomization characteristics of fan-shaped air-blast atomization SNCR nozzle

LEI Lan; CAO Na; CAO Liang; XU Qing; HAN Chang-cai; DUAN Bao-jun

doi:10.3788/OPE.20162413.0028

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Holographic measurement of atomization characteristics of fan-shaped air-blast atomization SNCR nozzle

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- Holographic measurement of atomization characteristics of fan-shaped air-blast atomization SNCR nozzle
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 28-34(2016)
- 作者机构：
  
  西北核技术研究所激光与物质相互作用国家重点实验室,陕西西安,710024
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0028
  CLC： TQ051.73;X701.3;TK223.26
- Received：12 June 2016，
  
  Revised：02 July 2016，
  
  Published：14 November 2016
- 稿件说明：
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雷岚*, 曹娜, 曹亮等. 扇形气力雾化SNCR喷嘴雾化特性的全息测量[J]. 光学精密工程, 2016,24(10s): 28-34

LEI Lan*, CAO Na, CAO Liang etc. Holographic measurement of atomization characteristics of fan-shaped air-blast atomization SNCR nozzle[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 28-34
雷岚*, 曹娜, 曹亮等. 扇形气力雾化SNCR喷嘴雾化特性的全息测量[J]. 光学精密工程, 2016,24(10s): 28-34 DOI： 10.3788/OPE.20162413.0028.

LEI Lan*, CAO Na, CAO Liang etc. Holographic measurement of atomization characteristics of fan-shaped air-blast atomization SNCR nozzle[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 28-34 DOI： 10.3788/OPE.20162413.0028.

摘要

基于微粒场全息术设计了一种粒子场离轴全息测量系统，用以获得扇形气力雾化（SNCR）喷嘴的液滴粒径及粒度分布等雾化特性。首先介绍了该全息测息系统的基本原理和组成，然后通过单次实验获得了

70 mm圆形区域的雾化场全息图，对全息图进行再现采集及图像处理后获得了指定区域的索特平均直径（SMD）和不同粒径的液滴数量占位比。实验结果表明：该喷雾场的雾化粒度

在50~170

m之间，中心雾化粒度大，向边缘方向逐渐减小，是理想的SNCR喷嘴雾化形式；在液体流量固定的情况下，雾化粒度

会随着气耗率的上升而下降。该结果是评估SNCR喷嘴雾化性能的主要数据，对喷嘴在实际运行中的控制技术和雾化机理的理论研究具有指导意义。

Abstract

An off-axis pulsed particle holographic system was established based on micro particle holography

for measuring the spray characteristics such as particle size and distribution of the fan-shaped air-blast atomization nozzle. The principle and composition of the optical holographic system was introduced firstly

by which the atomization field hologram for the Φ70 mm circular area was recorded. After collection of the hologram reproduction and image processing

the Sauter Mean Diameter (SMD) and the occupation ratio of droplets with different diameters were acquired. The experimental results show that droplet size

of the atomization field is between 50

m and 170

with larger droplet size in middle part and gradually diminishing towards the edge. It is an ideal atomization mode for the SNCR nozzle; where there is a fixed liquid flow

the atomization droplet size

will decrease as the gas loss rate goes up. It indicates that the main evaluation data for atomization property of the SNCR nozzle is of great guiding significance to the theoretical research on control technology and atomization mechanism of the nozzle in practical operation.

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references

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