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通过试验研究掌握单排管换热器流动和传热规律,对于空冷技术的国产化具有重要的意义。详细介绍了试验台架系统和测量方案。在深入分析了单排管换热器流动和传热过程的基础上,利用传热风洞对单排管换热器进行了热工水力试验研究。采用保持空气入口温度不变,同时固定初始温差的方法,综合考察了单排管换热器的流动阻力和空气侧传热系数等关键参数,得到了在不同空气迎面风速下流动阻力和传热的关联方程式,为工程优化设计提供依据。另外,还分析了不凝结气体对单排管换热器传热性能的影响。
Through the pilot study to grasp the single-row heat exchanger flow and heat transfer law, for the localization of air-cooled technology is of great significance. The test bench system and measurement plan are introduced in detail. Based on the analysis of the flow and heat transfer process of the single-row heat exchanger, the heat and hydraulic test of the single-row heat exchanger was carried out by using the heat transfer wind tunnel. Adopting the method of keeping the air inlet temperature constant and fixing the initial temperature difference, the key parameters such as the flow resistance of the single-row tube heat exchanger and the air-side heat transfer coefficient are comprehensively investigated. The flow resistance and heat transfer at different air frontal velocities are obtained. Related equations to provide the basis for engineering design optimization. In addition, the influence of non-condensing gas on the heat transfer performance of single-row heat exchangers was also analyzed.