According to the experimental data of droplet size 、 particle spectrum range 、 droplet cone shape 、 flow rate 、 cover area and cover area rate which obtained through changing the pressure of power sprayer and the nozzle diameter in greenhouse ， this paper made comparative analysis on atomizing performance in same pressure and different nozzle type between same nozzle type and different pressure . the conclusion is that : the ejection rate and the droplet cone shape change with the variation of pressure and nozzle diameter ， average particle diameter decreases obviously and particle quantity increases obviously with the increase of pressure and decrease of nozzle diameter . these results will lay experimental foundation for precise spraying 、 low pollution and highly effective operation 本文根据温室内动力喷雾机压力与喷嘴孔径的变化影响雾滴大小、粒谱范围、雾锥形状、流量、覆盖面积及覆盖面积率的试验数据，对相同压力下不同喷嘴型号和相同喷嘴型号时压力不同时的微粒化性能进行对比分析和研究，得到如下结论喷出量与雾锥形状随着压力和喷嘴孔径大小变化而变化；平均粒径随着压力的增加和喷嘴孔径的减小而明显减小；粒数随着压力的增加和喷嘴孔径的减小而明显增多，为精喷量、低污染、高防效的防除作业奠定了实验基础。
The structure of air - blast pipe was improved on . an orienting object was installed based on theoretical analysis , that increase the spraying span . it has been found that both spraying span and droplets uniformity improved , by installing the orienting object . according to the results of a great number of experiments , orderliness of droplets diameter along the spraying span was researched , and rational spraying span of air - assisted sprayer was suggested 通过试验检验喷雾机样机的喷雾性能，并提出对各项参数的优化设计方案。通过正交试验和对比试验对雾滴取样，证明导流器的安装不仅增加了喷幅，而且还提高了雾滴均匀性系数。根据大量试验的结果分析，找出了雾滴直径在喷幅方向上所呈现的变化规律，并提出了合理的喷幅范围。
The fog attenuations at infrared wavelength are computed and analyzed with the fog drop size distribution model of radiation and advection fog , the empirical relation of fog attenuation with water content or visibility are obtained at 10 . 6 urn wavelength , the relation for radiation fog have a good agreement with the relation obtained by experimental results 基于雾滴尺寸分布模型，对雾的红外辐射衰减特性进行了分析和研究，并给出了10 . 6 m红外辐射衰减与雾的含水量或能见度的经验关系，该经验关系与实验结果间有很好的一致性。
The key items influent on the characteristics of spraying have been also studied in the dissertation , we can get a good spraying result by adjusting the related parameters efficiently . ( 3 ) the theoretical model of the dynamical parameters such as temperature , moisture , pressure and contour for hot medium and particle inside the drying chamber were obtained by model , utilized the computational fluid dynamics technique to solve the problem between spraying droplets medium by arranging the double grid dispersing structure and rotary outlet structure and the developed structure improved the drying efficiency and product quality ( 3 )采用-模型实现了压力喷雾干燥塔的温度场、湿度场、流场的理论建模，利用计算流体力学( cfd )技术来解决喷雾干燥过程中热介质与雾滴间的传热传质以及动量传递和湍流扰动等问题，避免了干燥过程中的设计不合理状况；通过增加双格栅均风装置和旋转出风装置，改善了干燥塔内的热质传递，提高了干燥塔的体积蒸发强度。
First , a simple discussion for the mechanism about electrostatic atomization of the liquids has been given ; then the paper theoretically analyzed waving course , liquid drop producing course , and the liquid drop diffusing course in electrostatics atomization process . , gave an analysis about the methods about carrying charges to the liquid drop , and analyzed that liquid with high electrical conductivity can be carried charges and atomized by electric field , while the isolated liquid with low electrical conductivity can be charged fully with the soakage electrode and inducing charge methods . at last the paper designed and configured the experimental equipment , conducted the atomization experiment to the three liquid medium - kerosene , emulsifier and alcohol under the same environment , handled the experimental results , then summarized the relationship between liquid electrostatic atomization effect and liquid surface tension , electronic conductivity and viscosity , along with the influence of voltage to electrostatic atomization and so on , found out the liquid atomization rule in high voltage electrostatic field 首先,对液体介质的静电雾化机理作了初步的探讨,理论上分析了液体雾化过程中射流区、波纹区、雾滴区和雾滴扩散区;然后对液体荷电方法进行了研究分析,对于高电导率的液体,场致荷电和接触荷电可以使其雾化,而对于电导率较低的绝缘液体,需用浸润电极荷电和感应荷电方法使其充分带电;最后,根据前面的研究分析,设计和组装试验装置,在同一环境下对煤油、乳化剂、酒精三种不同液体介质进行高压静电雾化试验,并对试验结果进行分析处理,总结出液体静电雾化与液体表面张力、电导率和粘度的关系及电压对液体静电雾化的影响等,得出高压静电场中液体雾化的一般规律。
The key dimension of fan have been designed . experimentally analyzed with water spray analyzing the number distribution and mass distribution of drops when use different water volume , the main diameter range is from 20 to 50 u m . the total drop quantity is 90 percent which diameter is less than 40 u m . using proof analyzing , the water volume have litter effluence the evaporative rate , and the whole drops can evaporate fully 对冷风机的射流理论进行分析，研究冷风机的射流直径和射流范围，并对冷风机的安装高度，安装距离进行分析；通过原理设计冷风机通风和喷雾关键部件的结构尺寸，对冷风机的通风和喷雾进行检测，雾滴直径在不同的喷雾量下变化不大，基本保持在20 - 50 m之间，在不同的喷雾直径下，雾滴直径90都在40 m以内，使用数理统计方法分析雾滴粒度分布规律，根据实际数据和参数估计的进行假设检验，结果显示理论和实际数据基本吻合，冷风机的雾滴能充分的蒸发。
The result indicates that for enhancing particle target collection efficiencies , the inertia effect of particle and the coulombic force between particles should be carefully distinguished in different particle size ranges ; and proves that when droplets are weakly charged , it is still effective for the collection of sub - micron charged particles 结果表明，在不同粒径区间内，粒子的惯性效应和雾滴与粒子间的库仑力对强化粒子靶效率的作用需要仔细加以辨认，同时证明?当雾滴弱荷电时，对亚微米带电粒子捕集依然是有效的。
The dehydration time is square of the droplets diameter so the small diameters of the droplets can cut down the drying time then reduce the height of the drying chamber . to the combined spin - flow pressure spray drying , the diameters of droplets are small and the dehydration rate is higher so keeping the qualities of the dried products we can increase the speed of the inlet wind and reduce the temperature of the outlet wind thus can improve the evaporation intensity of the drying chamber and the average energy utilization of the drying equipment 因雾滴的脱水时间与其直径的平方成正比，减小液滴直径有利于缩短干燥脱水时间，可有效降低干燥塔的高度；由于旋流式组合压力喷嘴雾化滴径的减小，脱水速度明显加快，在不影响干燥物料性质的前提下，适当提高进风温度，同时有效地降低排气温度，有利于提高干燥塔的蒸发强度，也有利于提高干燥设备的平均能源利用率。
Experimental constants include : ambient temperature 291k ~ 301k , rh 15 % ~ 21 . 2 % , wind velocity 3 . 2m / s at the nozzle position and horizontal to the spray fan , others are same as the fore experiment . the tendency of the two experiments results is consistent with the tendency from simulation . that indicate the improved shield spray is better than the original shield spray in reducing spray drift , and also more better than conventional spray without shield 风洞试验参数：喷雾药液为含1 bsf的水溶液，风速1 . 4m s ，风向垂直于喷雾扇面，温度281k 288k ，相对湿度rh9 20 ；室内试验参数：喷雾药液为含2 bsf的水溶液，喷头处风速为3 . 2m s ，风向平行于喷雾扇面，温度291k 301k ，相对湿度rh15 21 . 2 ；分别在喷头下风向喷幅外的空中和地面布点收集飘失和飘移沉积的雾滴量，作为评价减少雾滴飘失效果的指标：试验结果表明：改进后的罩盖喷雾减少雾滴飘失的效果好于双圆弧未开口罩盖喷雾，常规无罩盖喷雾的雾滴飘失量大于开口罩盖喷雾。
