摘要
取料装置能耗占设备总能耗的70%以上,直接影响设备的能耗和物理性能。为有效评估设备取料装置取料能力对设备物理性能的影响,研究了由于粉尘堆积造成的设备取料装置堵塞对取料装置性能的影响。采用粒子图像测速技术,在马赫数和雷诺数相似的环境下对不同工况的表面气流速度分布进行了实验测量,观测了激波结构,并计算了涡量、Q值等参数。根据实验测得的速度分布情况和力矩平衡公式,计算了不堵塞与堵塞工况下取料装置能耗变化情况。结果表明,取料装置堵塞后的取料装置头部产生的激波位置发生改变,激波位置后移2~3 mm,激波仍为典型的弓形曲线激波形式,但激波中段激波角变化大约5°,涡量值减小约50%。法向速度梯度明显减小,流动性质发生一定程度的改变。堵塞后能耗增加3~5 W,取料装置前端激波后温度已经超过100℃,不利于取料装置长期使用和设备长期稳定运行。取料装置出口气流相对压力不大于0.7,才能保证物理性能满足要求,同时设备稳定运行。
The material fetching device exerts direct influence on the energy consumption and physical properties of equipment,as its total energy consumption accounts for over 70%of the total energy consumed by the equipment.This paper studies the influence of dust that accumulates on and blocks the material fetching device on its properties in order to evaluate the influence of fetching capacity of the physical performance of the device.The surface airflow speed was tested and measured under different working conditions in an environment where the Mach number and Reynolds number are similar by virtue of the particle image velocimetry.The impact wave structure was observed and parameters,such as vorticity and Q value,were calculated.The speed distribution and moment balance formula were measured through testing,calculating the changes of the device's energy consumption under blocking and non-blocking status.According to the results,the position of shock wave generated at the head of the device after it is blocked is moved backward 2~3 mm;the shock wave is still a typical curve shock wave,but the angle in the middle section is altered by about 5°,and the vorticity is reduced by about 50%.The normal velocity gradient is significantly lower,and the flow property also changes.After blocking,the energy consumption increases by 3~5 W,and the temperature after the shock wave at the front end of the device exceeds 10o C,which is not beneficial to the long-term use of the device and stable operation of the equipment.Only when the relative airflow pressure at the outlet of the device is no greater than 0.7 can the physical performance satisfy the requirements,and the equipment run stably.
作者
赵君
ZHAO Jun(Research Institute of Physical and Chemical Engineering of Nuclear Industry,Tianjin 300180,China;National Key Laboratory of Particle Transport and Separation Technology,Tianjin 300180,China)
出处
《核科学与工程》
北大核心
2025年第4期704-711,共8页
Nuclear Science and Engineering
基金
天津市教委科研计划项目(No.ZX21012)。
关键词
取料装置
激波
旋涡
能耗
Retaking device
Shock wave
Vorticity
Energy consumption
