STABILITY OF A LIQUID JET IN AIR FLOW NORMAL TO THE JET AXIS
STABILITY OF A LIQUID JET IN AIR FLOW NORMAL TO THE JET AXIS
复制标题
垂直于喷射轴的气流中液体射流的稳定性
DOI：
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发表时间：
1976
期刊：
影响因子：
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通讯作者：
Teruo Takahashi
中科院分区：
文献类型：
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作者：
Y. Kitamura;Teruo Takahashi
研究了垂直于射流轴的气流中液体射流破碎的空气动力学效应。假设液体中的扰动关于射流轴对称，而周围空气中的扰动是非对称的，则从理论上推导出扰动增长率的特征方程。方程的数值分析预测最大增长率随着基于空气密度的韦伯数的增加而增加。通过从喷嘴喷射水、乙醇和甘油水溶液来测量破裂长度，喷嘴的轴线垂直于气流方向。在空气速度小于 500 cm/sec 的区域，实验破碎长度与理论破碎长度一致，在该区域观察到对称扰动引起的射流分解，并且射流垂直于气流的假设似乎是合理的。
Aerodynamic effects on the breakup of liquid jets in the air flow normal to the jet axis have been studied. A characteristic equation for the growth rate of disturbances is theoretically derived on the assumption that disturbances in the liquid are symmetric about the jet axis and those in the surrounding air are non-symmetric. The numerical analysis of the equation predicts that the maximum growth rate increases with the Weber number based on the density of air. The breakup length was measured by the ejection of water, ethanol and aqueous glycerol solution from a nozzle, whose axis was normal to the direction of air flow. The experimental breakup length agrees with the theoretical one in the region of air velocities less than 500 cm/sec, where the disintegration of jets by symmetric disturbances is observed and the assumption of the jet normal to the air flow appears reasonable.