摘要
醋酸纤维丝束是目前卷烟过滤嘴的重要原材料,生产工艺中进行高温雾化处理能显著提升丝束物理特性,其工作温度一般集中在65~90℃之间,对高压精细雾化喷嘴的内流场特性进行研究,重点研究了不同温度对雾化压力的影响,利用FLUENT软件对喷嘴的流场以及不同温度下喷嘴内流场进行了数值模拟。根据流场的状态,仿真为瞬态模拟,其仿真结果表明,高压精细雾化喷嘴在旋流室内形成绕中心旋转的涡旋运动,且不断向前运动,直至到喷嘴出口高速喷出;不同温度下其压力与黏温特性相关,在60℃以下,基本接近水的黏性系数变化趋势,但在60℃时出现了拐点,出口压力受黏温特性影响更加明显,出口压力呈指数形式下降。
Acetate fiber tow is an important raw material for cigarette filters at present. High temperature atomization treatment in the production process can significantly improve the physical properties of the tow, its working temperature is generally between 65 ℃ and 90 ℃.The characteristics of the flow field were studied, focusing on the effect of different temperatures on the atomization pressure. The FLUENT software was used to numerically simulate the flow field of the nozzle and the flow field in the nozzle at different temperatures. According to the state of the flow field, the simulation was a transient simulation. The simulation results show that the high-pressure fine atomizing nozzle forms a vortex motion around the center in the swirl chamber, and moves forward continuously until it sprays out at a high speed at the nozzle outlet.At different temperatures, the pressure is related to the viscosity-temperature characteristics. Below 60 ℃, it is basically close to the change trend of the viscosity coefficient of water, but an inflection point appears at 60 ℃. The outlet pressure is more obviously affected by the viscosity-temperature characteristics, and the outletpressure decreases exponentially.
作者
张嘉丽
李浩
梁文宏
Zhang Jiali;Li Hao;Liang Wenhong(School of Mechatronic Engineering,Xi'an Technological University,Xi'an 710021,China)
出处
《机电工程技术》
2023年第2期63-67,共5页
Mechanical & Electrical Engineering Technology
基金
陕西省西安市未央区科技局资助项目(编号:202112)。
关键词
精细雾化
不同温度介质
速度场
压力场
fine atomization
different temperature medium
velocity field
pressure field
