对气流纵掠不同结构参数的针肋套管换热元件的传热及阻力特性进行了试验研究 ,得到了该种换热元件的传热及阻力性能的实验准则关联式 ,进一步就不同结构参数对针肋套管热力性能的影响进行了比较分析 ,并为该种换热元件的工业应用提供了可靠的试验数据和设计依据 The heat transfer and resistance characteristics of needle-finned tube heat exchangers with different structural parameters of longitudinal sweep were studied. The experimental criteria of the heat transfer and the resistance performance of the heat exchangers were obtained. According to the experimental results, The influence on the thermodynamic performance of the needle bushing was comparatively analyzed, and the reliable test data and design basis were provided for the industrial application of the heat exchange element