喷雾粒径测试方法分析及比较

Analysis and Comparison of Spray Particle Size Measurement Methods

喷雾粒径是对喷雾效果评价的重要参数,雾滴效果的好坏对于农业喷洒灌溉、内燃机的效率、航空航天有着重要的意义。因此针对不同喷雾测试方法得到的喷雾数据分析比较,分别以水敏纸法、油盘法和激光粒度仪法在0.3MPa喷雾压力的条件下对5种喷头分别进行雾滴粒径测定的数据比较;液滴评判系统和马尔文测量法在相同孔径不同压力下测得的雾化特性参数比较。分析结果表明:户外的喷雾场测试中使用水敏纸法是较好的选择;随着数字图像处理技术的发展而诞生的液滴尺寸判读系统可以作为实验室喷雾场测试方法的一种很好的补充。

Spray particle size is an important parameter for the evaluation of spray effect.The effect of droplets is of great significance for agricultural spraying irrigation,the efficiency of internal combustion engine and aerospace.Therefore,for the analysis and comparison of spray data obtained by different spray testing methods,water sensitive paper method,oil pan method and laser particle size analyzer were used to compare the data of droplet size measurement of five nozzles under the condition of 0.3MPa spray pressure.Comparison of atomization characteristic parameters measured by droplet evaluation system and Malvern method under the same aperture and different pressures.The analysis results show that water sensitive paper method is a better choice in outdoor spray field test.With the development of digital image processing technology,the droplet size interpretation system can be used as a good supplement to the laboratory spray field testing method.