不同通风方式下热喷涂车间内粉尘运动规律的实验研究

为获取热喷涂工艺过程中微纳米粉尘颗粒的控制措施，根据相似原理，以热喷涂车间为原型，结合气固两相流理论，建立了热喷涂车间相似实验模型，对不同通风除尘条件下热喷涂车间内微纳米粉尘颗粒的运动与扩散规律进行实验研究。研究结果表明：机械通风对降低热喷涂车间微纳米粉尘颗粒浓度具有明显效果；单位时间内通风流量越大，车间呼吸层微纳米粉尘颗粒浓度越低，清除时间越短；通风速率相同的条件下，采用车间底部和侧面组合的通风方式较仅采用侧面强力通风，更利于呼吸层微纳米粉尘颗粒的排除和沉降。

Experimental Study on Moving Regulation of Dusts in Thermal Spraying Workshops with Different Ventilation Patterns

In order to obtain the control measures of ultrafine particles in the thermal spraying processes， the similar model of thermal spraying workshops was established by combining the similarity principle and the gas-solid two-phase flow theory based on the actual thermal spraying workshops. The diffusion regulations of ultrafine particles were studied experimentally under different ventilation conditions. The results show that mechanical ventilation has a significant effect on reducing the concentration of ultrafine particles in thermal spraying workshops. Both of the concentration of ultrafine particles and the time of dust removed entirely decrease with the increase of the ventilation flow per unit time in the workshops. The ventilation combing the bottoms and the sides is suitable to achieve the removal and sedimentation of ultrafine particles compared with the strong ventilation over a single side under the same ventilation rate.