船用锅炉方形翅片管经济器的试验与应用

对某船主锅炉经济器更新的必要性进行讨论，分析了方形翅片管的应用情况和优点，在传热风洞试验台上采用恒壁温法对方形翅片管束空气侧流动阻力和传热进行了试验研究。结果表明，风速大于25m/s时，应通过试验对换热系数进行修正，最后根据试验结果经过多方案优化比较得到了方形翅片管经济器的合理设计方案。

Experimental and Applied Research of the Square Finned-tube Economizer of a Marine Boiler

A discussion is conducted regarding the necessity to upgrade a marine main boiler economizer along with the analysis of the application circumstances and merits of square finned tubes. On a heat-transfer wind tunnel test rig an experimental research of the air-side flow resistance and heat transfer was performed of square finned tube banks. The results of the research indicate that in case of air speed greater than 25 m s it is necessary to revise heat transfer factors through tests. Finally, a rational design scheme was decided for the economizer with square finned tubes on the basis of the test results.