本文从实验的角度出发,对正弦型剖面的纵槽管进行了研究。找出了局部换热量与纵向坐标的关系。在拟合准则方程时,文中引进了一个新的特征参数L_c。并以此得到无量纲纵坐标z/L_c替代其他学者用实验段管长L来得到无量纲纵坐标z/L。且指出了原方法的不足之处。 In this paper, from the experimental point of view, the sinusoidal section of the longitudinal groove tube was studied. Find out the relationship between local heat exchange and longitudinal coordinate. In fitting the criteria equation, a new feature parameter L_c is introduced in this paper. And the dimensionless ordinate z / L_c is substituted for other scholars to obtain the dimensionless ordinate z / L by using experimental segment length L. And pointed out the deficiencies of the original method.