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为研究在顺风流扰动下的喷雾场粒度-速度分布规律,建立了基于相位多普勒激光干涉仪的喷嘴高压雾化实验平台。根据井下喷雾除尘的实际情况,同时结合现有的实验条件,设计了实验测点以及实验风速,并选取了以孔径为2.0 mm含X型导流芯混合喷嘴为主要喷嘴进行实验。得到了在顺风条件下,整个雾场的雾滴速度整体增加,而雾滴粒径整体减小但分布更加均匀。通过数据的比较,得知在4 MPa喷雾压力下,雾场的宏观、微观特性已经足以满足井下降尘的需求。
In order to study the particle size-velocity distribution of the spray field under the disturbance of downwind flow, a high-pressure nozzle atomization experiment platform based on the phase Doppler laser interferometer was established. According to the actual situation of dusting in underground mine, the experimental measuring points and experimental wind speed were designed according to the existing experimental conditions. The experiments were carried out with 2.0 mm orifice containing X-type flow diversion nozzle as the main nozzle. Under the condition of downwind, the droplet velocity of the entire fog field increases as a whole while the particle size of the droplet decreases overall but the distribution is more uniform. Comparing the data, we know that under the pressure of 4 MPa, the macroscopic and microscopic characteristics of the fog field are enough to meet the requirement of downhole dust.