CAJ | 학술논문

通过搭建内螺纹扭曲椭圆管复合强化管换热器传热与压降性能测试平台，对内螺纹扭曲椭圆管复合强化管换热器的管程传热和流阻性能进行了实验研究，以实验数据为基础拟合得到其对流传热系数和流动摩擦阻力系数与管内流体Reynolds数的计算准则关系式，将内螺纹扭曲椭圆管与光滑圆管、内螺纹圆管、光滑扭曲管的管程传热、流阻以及综合性能进行对比分析，结果显示内螺纹扭曲管流动阻力略高于其他类型的换热管，传热效果和综合性能明显优于其他类型换热管。内螺纹扭曲管作为一种内螺纹和扭曲扁管强化传热技术的叠加技术，强化传热效果明显，具有重要的工程应用价值。
통과탑건내라문뉴곡타원관복합강화관환열기전열여압강성능측시평태，대내라문뉴곡타원관복합강화관환열기적관정전열화류조성능진행료실험연구，이실험수거위기출의합득도기대류전열계수화류동마찰조력계수여관내류체Reynolds수적계산준칙관계식，장내라문뉴곡타원관여광활원관、내라문원관、광활뉴곡관적관정전열、류조이급종합성능진행대비분석，결과현시내라문뉴곡관류동조력략고우기타류형적환열관，전열효과화종합성능명현우우기타류형환열관。내라문뉴곡관작위일충내라문화뉴곡편관강화전열기술적첩가기술，강화전열효과명현，구유중요적공정응용개치。
By building a platform for testing heat transfer and pressure drop performance, the thermal performance and flow resistance on the tube side of an internally ribbed twisted tube heat exchanger are examined. Based on the experimental result, correlations for the heat transfer coefficient and friction factor with tube side Reynolds number are obtained. This paper compares and analyzes the heat transfer, pressure drop and comprehensive performance of internally ribbed twisted tube, smooth twisted tube, internally ribbed circular tube, and general smooth tube with similar geometric parameters. The results show that although the internally ribbed twisted tube gives slightly higher flow resistance, it presents the highest heat transfer coefficient and comprehensive performance among these tubes. The coupled enhancement effects for heat transfer resulted from internal rib and twisted tube are obvious, and this structure will be widely used in the industry.