CAJ | 학술논문

为提高茶叶风选质量,以空气动力学为基础,将茶叶颗粒简化近似为球形颗粒;通过数值计算,研究不同重量的茶叶颗粒在不同的风道口流场(不同风速分布)作用下的漂移轨迹、水平漂移规律,以及风向角对茶叶风选质量的影响,并进行了相关试验验证.结果表明:在风选室相同情况下,风速按上小下大分布,茶叶颗粒群的有效漂移距离大于其他风速分布方案;风向角α=16.3°,风速分布系数β=0.17为最佳风口流场参数组.本研究为优化设计茶叶风选机提供了理论基础.
위제고다협풍선질량,이공기동역학위기출,장다협과립간화근사위구형과립;통과수치계산,연구불동중량적다협과립재불동적풍도구류장(불동풍속분포)작용하적표이궤적、수평표이규률,이급풍향각대다협풍선질량적영향,병진행료상관시험험증.결과표명:재풍선실상동정황하,풍속안상소하대분포,다협과립군적유효표이거리대우기타풍속분포방안;풍향각α=16.3°,풍속분포계수β=0.17위최가풍구류장삼수조.본연구위우화설계다협풍선궤제공료이론기출.
In order to improve the quality of tea wind-selecting, the tea particles were approximated as spherical particles, and based on aerodynamics, the movement trajectory and horizontal drift of different weight particles under different inlet flow field (different air velocity distributions) of the tea wind-selecting air inlet, and the effect of air velocity angle on quality of tea wind-selecting are investigated through numerical calculation, being combined with experimental verification. The research showed that the effective drift spacing between particles of different weight is greater than the other air velocity distribution program, in the same wind-selecting room, and the air velocity distribution rising from the top to the bottom. The angel of air velocity direction α=16.3° and air velocity distribution coefficient β=0.17 were regarded as the most favorable air inlet flow field parameters. This study provides a theoretical basis for optimization design of tea wind-selecting machine.