厚板射流冲击下淬火冷却的换热系数建模计算  

Model Calculation of Heat Transfer Coefficient of Quenched Cooling under Jet Impingment Plate

作　　者：邓运来[1] 贺有为[1] 曹盛强[1,2] 张新明[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]广西南南铝加工有限公司,南宁530031

出　　处：《航空材料学报》2011年第5期23-28,共6页Journal of Aeronautical Materials

基　　金：国家重点基础研究计划资助项目(2005CB623700)

摘　　要：建立一种多喷嘴同时喷射淬火冷却的数学模型,通过实测冷却曲线分析计算厚板驻点区与紊流区换热系数分布规律,基于ABAQUS模拟软件模拟验证模型。结果表明:驻点与紊流点处的换热系数随时间分布是不均匀的,在10～20 s内出现峰值,随后呈上下波动变化的规律;实测(或计算)试样心部与表面的冷却曲线与模拟的吻合较好,验证了多喷嘴同时喷射下的换热系数分布模型。The quenched cooling heat transfer process of the thick plate by multi-nozzle jet impinging is extremely complicated,thus it is difficult to establish a model of the surface heat transfer coefficient distribution,which reveals the speed of the heat transfer on the jet impinging surface.In this paper,the mathematical model of multi-nozzle jet simultaneously impinging quenched cooling has been established,coefficient distribution law at the stagnation and turbulent zone has been calculated by actual measurement of the cooling curve and has been verified based on the ABAQUS simulation software.The results show that the coefficient distribution at the stagnation and turbulent zone is uneven over time,and the peak appeared within 10 to 20 seconds,and then comes to the variation of the next waves.The actual measurement（or calculation） of the cooling curves at the sample＇s center and surface is at a very good match state with that of simulation,therefore it verifies the heat transfer coefficient distribution model under the multi-nozzle jet simultaneously impinging.

关 键 词：铝合金厚板 换热系数 ABAQUS模拟 射流冲击 

分 类 号：TG249.1[金属学及工艺—铸造] TG146.2[一般工业技术—材料科学与工程]