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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental investigation of consecutive water droplets falling down through high-temperature gas zone
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Experimental investigation of consecutive water droplets falling down through high-temperature gas zone

机译：连续水滴从高温气体区落下的实验研究

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摘要

An experimental investigation of the motion of water droplets falling down in series of 2, 3 and 4 through high-temperature gas (about 1100 K) was carried out. Sizes of droplets (radii 1-3 mm), initial distances between them (4-36 mm), initial speeds (0.5-2 m/s), as well as up-flow gas velocities (1.5 m/s) are varied within ranges corresponding to some advanced applications. Velocities and evaporation rates of each droplet were measured by high-speed video camera "Phantom" (up to 10~5 frames per second), associated with the software packages "Tema Automotive" and "Phantom Camera Control" while varying the distance between droplets within wide range. Conditions for coalescence of droplets, their slowing down and acceleration in high-temperature gases were determined. Influence of the initial droplet sizes, the distance between droplets, their temperatures as well as their number during motion in an upstream flux of high-temperature gases on the intensification of evaporation was analyzed. One of the most typical mechanisms of droplet coalescence in high-temperature gas zone was experimentally confirmed.
机译：对通过高温气体（大约1100 K）以2、3和4的顺序下落的水滴的运动进行了实验研究。液滴的大小（半径1-3毫米），它们之间的初始距离（4-36毫米），初始速度（0.5-2 m / s）以及上升气流速度（1.5 m / s）在以下范围内变化范围对应于一些高级应用程序。通过与“ Tema Automotive”和“ Phantom Camera Control”软件包相关联的高速摄像机“ Phantom”（每秒高达10〜5帧）测量每个液滴的速度和蒸发速率，同时改变液滴之间的距离在广泛的范围内。确定了液滴在高温气体中聚结，减慢和加速的条件。分析了初始液滴尺寸，液滴之间的距离，液滴的温度以及在高温气体上游通量中运动过程中液滴的数量对蒸发强度的影响。实验证实了高温气体区液滴聚结的最典型机理之一。

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