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运用粘性液膜气动不稳定概念,并考虑了初始液膜厚度的确定和液膜厚度的沿程变化,建立了气动喷嘴的喷雾理论模型和平均滴径的计算方法。计算了喷雾滴径随工作条件(包括空气速度和气油比)的变化规律。根据试验结果,整理出计算值与试验值之比随空气速度、气油比和空气旋流角变化的关联式,计算与试验值的量级相同,且空气旋流器角度较小时,二者符合较好。
The concept of aerodynamic instability of viscous liquid film and the determination of the initial liquid film thickness and the change of the film thickness are taken into account. The theoretical model of spray nozzle and the method of calculating the average droplet diameter are established. The variation of spray droplet diameter with working conditions (including air velocity and gas-oil ratio) was calculated. According to the test results, the correlation between the calculated value and the experimental value is plotted as a function of air velocity, gas-oil ratio and swirling angle of air. When the calculated magnitude is the same as the experimental value and the angle of the air swirler is small, In line with the better.