中文摘要：

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。

英文摘要：

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.