压力式螺旋型喷嘴雾化特性实验研究

液体雾化是两相流研究中非常重要的课题，在能源动力及环境工程中具有广泛的应用，进行系统的研究具有重要意义。螺旋型喷嘴是压力式的一种，能提供细密的液雾，用途比较广泛。本文用因次分析的方法建立了螺旋型喷嘴液滴直径的准则关系式，用最小二乘法回归了TF型喷嘴雾化粒子几种直径（D32D0.1D0.5、D0.9）的经验公式。结果表明，回归的经验公式具有比较好的相关性，可以通过它们预测喷嘴出口粒子的直径，并为螺旋型喷嘴的设计及应用提供理论依据。

An Experimental Study of Pressure-type Spiral Nozzle Atomization Characteristics

Liquid atomization represents a most important scientific issue playing a key role in the study of two-phase flows.Being widely used in energy and power supply units as well as in environmental engineering projects,it is of major significance to conduct a systematic study of the liquid atomization.A kind of pressure type nozzles,the spiral nozzles can provide a fine and dense liquid mist and have found relatively widespread applications.A criterion relationship featuring the liquid droplet diameters of spiral nozzles has been established by using a dimensional analytic method.An empirical formula applicable to several kinds of diameters(D_(32),D_(0.1),D_(0.5),D_(0.9)) of TF-type nozzle atomized particles were regressed by utilizing a least square method.The results show that the empirical formula thus regressed is characterized by a comparatively good correlation.Through the formula one can predict the diameters of particles at the nozzle outlet, thus providing a theoretical basis for the design and application of spiral type nozzles.