液滴半径与其侧向散射光通量关系的实验

Experiments on relationship between droplet radius and its lateral scattering luminous flux

为开发基于侧向散射光通量的喷雾液滴直径全场测量方法,搭建了均匀液滴射流发生器和侧向散射光通量测试装置。基于微粒几何散射理论,利用均匀液滴射流发生器实验研究了液滴半径与其侧向散射光通量之间的关系。在不同的侧向散射角下,用数字相机测量了水和0#柴油的单粒径液滴射流在不同粒径下的侧向散射光通量,并分析了它们之间的关系。实验结果表明:液滴半径与其侧向散射光通量之间存在明显的二次函数关系,拟合的相关系数大于0.98;侧向散射角的大小以及液体的种类均不会改变两者之间的二次函数关系,仅影响该关系式系数的大小。结果为基于侧向散射光通量实现喷雾雾滴直径的全场测量提供了重要依据。

To develop a method based on the lateral scattering luminous flux to measure spray droplet diameter distribution,a uniform diameter single droplet stream generator and a measuring equipment for lateral scattering luminous flux were constructed.On the basis of the scattering theory,the relationship between the droplet radius and its lateral scattering luminous flux was researched by using the uniform diameter single droplet stream generator.The lateral scattering luminous fluxes of two different liquids,water and 0 # diesel,were measured under different droplet diameters by a digital camera from different lateral scattering angles,and the relationship between them was analyzed.The experimental results show that a quadratic function relationship exists between the droplet radius and its lateral scattering luminous flux,and the correlation coefficient is greater than 0.98.Furthermore,the lateral scattering angle and the type of the liquid do not change this quadratic function relationship,but they will affect the coefficient of the quadratic function.It provides an important basis for the measurement of spray droplet diameter distribution.