摘要
在工程应用中,泡沫沥青的流量需根据不同的施工条件而变化,因此必须有效控制泡沫沥青的流量。由沥青发泡机理可知,泡沫沥青流量主要由沥青流量决定。根据小孔流量公式,沥青流量可通过控制沥青喷口前后压力或调节沥青喷口有效截面积实现,结合沥青发泡的特点选择后者控制沥青流量,在发泡腔结构上设计沥青流量控制机构,通过改变与喷口配合的锥形杆的位移来实现。运用Fluent软件模拟锥形杆不同位移下腔体内部的耦合流场,进而分析沥青流量与锥形杆位移之间的关系,通过对数值结果的曲线拟合,获得泡沫沥青流量的控制规律。
In engineering application, the flow of foamed bitumennedsto be changed according to the different construction conditions ,sathe flow of foamed bitumenmust be controlledeffectively.The bitumen foaming mechanism shows that the flow of foamed bitumendepends largely on the flow of b itumen.A ccarding to the formula of small hole flow, the flow of bitumen can be adjusted in two ways, one way is to control the pressure gap between two sides of bitumensprayer, the other is to adjust the effective sectional area of bitumen sprayer, combining with the characteristics of bitumen foaming, and the latter way is chosento control the flow of bitumen. A driving device of bitumen sprayer is designed, whichis realized by changing the displacement of conical rod that working withsprayer. The Fluent is used to simulate the coupling flow fieldwhen the conical rod has different displacement, then the relationshipbetweenthe flow of bitumen and the dplacement of conical rodcan be analyzed, finally, by matching the numerical result, the control lawcan be concluded.
出处
《机械设计与制造》
北大核心
2015年第4期123-125,共3页
Machinery Design & Manufacture
基金
国家自然科学基金资助项目(51265033)
内蒙古自然科学基金(2012MS0702)
关键词
泡沫沥青
沥青发泡装置
流量控制
流场模拟
Foamed Bitumen
Bitumen Foaming Device
Flow Control
Flow Field Simulation
