期刊论文

Simulation optimization of water spray velocities of on-line quenching system for extruded aluminum profiles

Li, Luoxing(llxly2000@163.com)

中文

哈尔滨工业大学学报

0367-6234

2019

51

1

191-200

10.11918/j.issn.0367-6234.201804191

国家自然科学基金（U1664252,51605234）； 湖南大学汽车车身先进设计制造国家重点实验室开放基金（31715011）；

本校为第一机构

为制定最优的在线淬火系统喷嘴流速方案,基于Fluent和Workbench软件平台建立了π字形大断面铝型材挤压在线淬火过程的有限元模型.为了准确确定仿真模型中的热边界条件,采用末端淬火实验和反热传导相结合的方法,获得了不同喷水流量下的界面换热系数.系统分析了3种不同喷嘴流速方案铝型材实际挤压在线淬火冷却过程中的流速场、温度场、应力场和残余变形.结果表明:随着喷水流量的增大,淬火介质与型材的界面换热系数增加且到达峰值的时刻越晚.有限元模拟的特征点温度与试验测量的温度变化趋势一致,相对误差范围为-1.1%～7.8%,验证了所建立的淬火有限元模型是准确的.初始方案一型材挤压在线淬火过程中...

To obtain the optimal water spray velocities of on-line quenching system, a finite element model for simulating the on-line quenching process of large section π-shaped aluminum profiles was established based on Fluent and Workbench software platform. To determine the thermal boundary conditions in the simulation, methods in spray quenching experiments combined with inverse heat conduction were used to get the heat transfer coefficients under different spray water fluxes. The velocity, temperature, stress fields and residual deformation of extr...