沥青洒布车喷嘴雾化特性数值模拟及参数优化  

Numerical Simulation and Parameter Optimization of Atomization Characteristics of Asphalt Distributor Nozzle

作　　者：同志学[1] 李晨宇 解妙霞[1] TONG Zhi-xue;LI Chen-yu;XIE Miao-xia(School of Mechanical and Electrical Engineering,Xi'an University of Architecture and Technology,Xi'an,Shaanxi 710055)

机构地区：[1]西安建筑科技大学机电工程学院,陕西西安710055

出　　处：《液压与气动》2022年第8期101-107,共7页Chinese Hydraulics & Pneumatics

基　　金：陕西省自然科学基金(2020JM-484)。

摘　　要：针对沥青洒布车横向洒布不均匀现象,对喷嘴的结构参数进行优化,以改善沥青洒布过程中的雾化质量。基于正交试验原理设计以喷嘴半球直径、切槽深度、切槽角为优化参数,以索特尔平均直径D_(32)及分布均匀性指数N为雾化特性指标的仿真方案。将VOF(Volume of Fluid)方法与DPM(Discrete Phase Model)方法进行耦合,通过VOF-to-DPM方法对喷嘴的试验方案进行仿真分析,并结合响应面法建立回归模型,优化求解获得最佳参数组合。结果表明:喷嘴的半球直径、切槽深度、切槽角对雾化特性有显著影响,且半球直径与切槽角之间存在显著的交互作用;喷嘴优化后在雾化质量上有显著提升,D_(32)减小了25.26%,N增加了10.27%。In view of the uneven transverse distribution of asphalt distributor,the structural parameters of nozzle are optimized to improve its atomization quality.Based on the orthogonal test method,the experimental design is completed with the nozzle hemispherical diameter,grooving depth and grooving angle as the optimization parameters,and the SOTER average diameter and distribution uniformity index as the atomization characteristic indexes.The nozzle is simulated and analyzed by VOF to DPM method,and the regression model is established combined with response surface method to obtain the best parameter combination.The results show that the hemispherical diameter,grooving depth and grooving angle have significant effects on the atomization characteristics,and there is a significant interaction between hemispherical diameter and grooving angle;After the nozzle optimization,the atomization quality is significantly improved,sauter mean diameter is reduced by 25.26%,distribution uniformity index is increased by 10.27%.

关 键 词：沥青洒布车 喷嘴 雾化特性 仿真分析 响应面法 

分 类 号：TH137[机械工程—机械制造及自动化] U418[交通运输工程—道路与铁道工程]