摘要
形状记忆合金(SMA)丝驱动器的冷却时间直接影响驱动器的响应速度。提出了一种以压缩空气为冷却气源的套管式强制空气对流冷却方案,可在不影响其他SMA丝的情况下实现对单根SMA丝的快速冷却。建立了自然冷却换热和强制对流换热的数值分析理论模型,并且对直径为1mm的NiTi合金SMA丝分别进行了自然对流和强制对流换热实验,实验结果验证了数学模型的准确性。
For the purpose of shortening cooling time of SMA actuators and the ultimate goal of improving the response speed,a novel cooling system was designed to amplify heat transfer coefficient by utilizing forced convection between a SMA wire and cooling pipe.Using compressed air as a cooling air supply,airflow through the annulus channel driven by pressure drop achieved rapid cooling of a single wire without affecting the others.The numerical analysis of natural cooling and forced convection heat transfer theoretical models were established to provide help for system design,and experiments of natural cooling and forced convection were carried out on a SMA wire of 1mm in diameter.Contrastive analyses of the theoretical solutions and experimental results indicate that the theoretical models are accurate.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2015年第15期2075-2080,共6页
China Mechanical Engineering
基金
国家自然科学基金资助项目(90716003)
江苏高校优势学科建设工程资助项目
关键词
形状记忆合金
冷却
强制对流
换热模型
shape memory alloy（SMA）
cooling
forced convection
heat transfer model
