查询结果:   王立文,袁振华,龚淼,杜凯歌,卢晶.TC4叶片MPAW焊接修复强化散热过程模拟仿真[J].计算机应用与软件,2019,36(7):50 - 54,132.
中文标题
TC4叶片MPAW焊接修复强化散热过程模拟仿真
发表栏目
应用技术与研究
摘要点击数
275
英文标题
SIMULATION OF TC4 BLADE MPAW WELDING REPAIR FORCED COOLING PROCESS
作 者
王立文 袁振华 龚淼 杜凯歌 卢晶 Wang Liwen Yuan Zhenhua Gong Miao Du Kaige Lu Jing
作者单位
中国民航大学航空工程学院 天津 300300     
英文单位
School of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China     
关键词
强化散热 移动热源 热流耦合 仿真模拟
Keywords
Forced cooling Moving heat source Heat flow coupling Analogue simulation
基金项目
国家自然科学基金项目(U1633104)
作者资料
王立文,教授,主研领域:机电液相关。袁振华,硕士生。龚淼,副教授。杜凯歌,硕士生。卢晶,硕士生。 。
文章摘要
TC4钛合金叶片高温下极易与空气中杂质发生反应。针对TC4焊接堆焊修复过程,采用双椭圆移动热源;通过COMSOL软件建立夹具及焊件的动态传热分析模型,并实验验证热源的正确性。通过仿真结果分析模型的传热规律,提出氩气间接强化散热方法;建立氩气流场及夹具温度场的耦合模型,选取焊件上表面的三个截点对比分析高温冷却时间。仿真结果表明,当氩气流速为12 cm/s,温度为20 ℃时,三个截点的冷却时间平均缩短0.123 s,占总冷却时长4.6%,提高了散热效果。
Abstract
The TC4 titanium alloy blade reacts easily with airborne impurities under high temperature. For the TC4 welding surfacing repair process, we used a dual-elliptical moving heat source. The dynamic heat transferring analysis model of the fixture and weldment were established by COMSOL software, and the heat source was verified by experiments. The heat-transferring rule of the model was analyzed by simulation results, and the indirect enhanced heat dissipation method of argon was proposed. In addition, we established the coupling model of argon flow field and fixture temperature field. Three points on the upper surface of the weldment were selected to compare and analyze the high-temperature cooling time. The results show that when the flow rate of argon gas is 12 cm/s and the temperature is 20 ℃, the cooling time of three intercept points is shortened by 0.123 s on average, accounting for 4.6% of the total cooling time, which improves the heat dissipation effect.
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