7050铝合金半连铸超声传播与空化机理研究  

Ultrasonic propagation and cavitation mechanism research of 7050 aluminum alloy D.C.Casting

作　　者：刘荣光[1] 李晓谦[1] 马维策[1] 蒋日鹏[1] 

机构地区：[1]中南大学机电工程学院,长沙410083

出　　处：《机械设计与制造》2008年第5期103-105,共3页Machinery Design & Manufacture

基　　金：国家"973"课题"大铸锭能量传输与宏微观缺陷的产生及控制"(2005CB23707)

摘　　要：论述了超声波在7050铝合金熔体中发生空化效应的根本原因,依照声压分布规律,运用Matlab数学工具,利用差商迭代法,对空化气泡壁运功Rayleigh-Plesset方程进行了数值计算,总结出在不同初始半径下7050铝合金超声半连铸发生空化效应的范围,归纳出空化效应对合金组织的影响规律,为超声波有效应用于7050铝合金半连铸提供一定的理论指导。It analyzed the ultrasonic refraction and reflection when it propagated to liquid cavern curve, figured out ultrasonic sound pressure values at liquid cavern curve, discussed primary causes of ultrasonic cavitations effect in 7050 aluminum alloy molten, according to ultrasonic field regularities of distribution, handled Mat lab mathematical tool, utilized difference quotient iteration, and numerical calculated cavitation bubbles moving Rayleigh-Plesset equation, summarized the range of occurring cavitation effect of 7050 aluminum alloy ultrasonic D.C.casting and effect of ultrasonic to ally organization under different initial radius. It supply definite theory supervise for ultrasonic application on 7050 aluminum alloy ultrasonic D.C.casting availability.

关 键 词：液穴曲线 折反射 空化效应 数值计算 

分 类 号：TH16[机械工程—机械制造及自动化] TB533[理学—物理]