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   雾滴密度 在 农业工程 分类中 的翻译结果: 查询用时:0.063秒
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雾滴密度
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  “雾滴密度”译为未确定词的双语例句
    The experiments were carried out to determine the impact factors and spray distribution pattern of droplet diameter and density of a 9WZCD-25 air-blast sprayer.
    通过一系列正交试验,揭示了9WZCD25型风送式超低量喷雾机的雾滴直径和雾滴密度在喷幅方向上的变化规律及其影响因素。
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    Results showed that the spray span increased from 22% to 46% and the uniformity and density of the droplets obviously improved after installation of the oriented object.
    试验证明,在风筒中安装导流器,不仅使喷幅提高了22%~46%,而且改善了雾滴均匀性和雾滴密度的分布。
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  droplet density
The first cumulant and time evolution of the droplet density correlation function can be quantitatively calculated by assuming the existence of polydispersed fractal clusters formed by the microemulsion droplets due to attraction.
      
Furthermore, if the ions can enter the droplet, a first-order phase transition occurs upon increasing Bjerrum length, surface tension or droplet density, leading to a phase separation.
      
The films are mainly crystallized in the austenitic phase and they have a smooth surface with a low droplet density (0.01?μm-2).
      
The liquid phase is described in Lagrangian form by the overall continuity equation, which reduces to an equation for the droplet size, the equations of motion, the energy equation and a droplet density function transport equation.
      
The conservation equations of mass, momentum, solute, and enthalpy for both phases, and an additional transport equation for the droplet density, were solved.
      
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A centralized spray cooling system for farm buildings was developed and tested under a practical production condition in summer. The inner air passage of its cooling installation was made as the shape of a funnel, gradually enlarged from the bottom to the top, so that the airflow velocity in the cooling installation decreased from the bottom to the top gradually. Higher air velocity near the air inlet at the bottom could resist most drops falling, lower velocity near the top could make the drops which were moving...

A centralized spray cooling system for farm buildings was developed and tested under a practical production condition in summer. The inner air passage of its cooling installation was made as the shape of a funnel, gradually enlarged from the bottom to the top, so that the airflow velocity in the cooling installation decreased from the bottom to the top gradually. Higher air velocity near the air inlet at the bottom could resist most drops falling, lower velocity near the top could make the drops which were moving upward with airflow slow down and fall back to the bottom of the installation, so that the time that spray drops contact with airflow could be prolonged, and a high density of drops in airflow could be kept with a lower water flow. The tests covered the ranges of average airflow velocity from 1.1m/s to 2.8m/s, and spray pressure from 0.06MPa to 0.16MPa, water/air coefficient (the ratio of the mass of sprayed water to airflow) from 0.08 to 0.5. It was showed that the evaporative cooling efficiency of the cooling installation could attain 80 % or more even at lower water/air coefficient from 0.1 to 0.2. In fair weather, the inside air temperature of the greenhouse, in which the centralized spray cooling installation was employed, was 2 ̄5.5 ℃ lower than outside temperature, and 4 ̄7.5 ℃ lower than that by mechanical ventilation only. When the cooling installation was running, the inside air relative humidity was 70 % ̄95 %. The total ventilation pressure loss was 40.3 Pa. In addition, the distribution of drops with different sizes in the cooling installation was surveyed and analyzed.

研究开发了一种用于农业建筑的集中雾化蒸发降温系统,进行了实际生产条件下的夏季降温试验。降温装置内部为过风断面由下而上逐渐扩大的漏斗状,形成下高上低的变风速场,以延长雾滴与气流的接触时间,在较小的喷雾量下维持较高的雾滴密度分布。在装置内平均气流速度1.1~2.8m/s,喷雾压力0.06~0.16MPa,水气比0.08~0.5的条件下进行了试验。试验结果表明该装置在0.1~0.2的较低水气比时其降温效率即可达80%以上,室内平均气温低于室外气温2~5.5℃,比单纯采用机械通风时低4~7.5℃。室内相对湿度为70%~95%,通风总压力损失为40.3Pa。对装置内不同粒径雾滴的分布进行了测定与分析

Under the condition of man_made protective culture, the

在人工栽培设施条件下,鲜切花极易遭受病虫害危害而造成产量和质量损失。根据网络原理,针对温室、大棚等设施内气流较为稳定、种植床分布规则等特点,通过药液集中稀释加压、高压管网分区排列、小孔径喷头分层立体多点定位等系统单元,研制成可自动调压,任意接驳的网络式农药细雾立体撒布系统。当撒布单元平移速度V=0.2m/s、喷片孔径=0.8mm、系统工作压力P=0.3MPa时,其2m处的雾粒直径均小于50μm;垂直高度1m处的叶片正面和背面捕获的雾粒密度分别达到44.0个/cm2和20.5个/cm2。与长江10-A型手动药械相比,其雾粒直径缩小近4倍,叶片正、背面捕获的平均雾滴密度分别增加4.8倍和5.6倍,工作效率则提高了10多倍。

By using 91WDC 150 Air assisted sprayer, three factors and three levels experiments were designed with bumping droplets collection. It was found through analysis of variance that the diameter of nozzle was the main factor affecting droplets uniformity, discharge rate and pressure in pesticide box were less important factors. The bast parameter combination was verified that the trend of droplets density and droplets size along spray were analyzed.

利用 91WDC 15 0型风送式喷雾机的样机 ,采用撞击雾滴采集法 ,通过三因素三水平的正交试验和方差分析得出 :喷嘴直径是影响雾滴均匀性的主要因素 ,其次是药液流量和药箱压力 ,并找出了最佳参数组合。分析和总结了雾滴密度和雾滴直径在雾流轴线方向上的变化规律。

 
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