高效宽负荷多级小焓降叶型在超超临界汽轮机中的应用

Application of High-efficiency,Wide-load,Multi-stage,Low-enthalpy Falling Blade Type in Ultra-supercritical Steam Turbines

主要对不同叶型在超超临界机组中的应用进行分析,给出小焓降叶型与大焓降叶型的某级段效率对比、攻角变化时级效率的变化,同时依托于超超临界改造机组对采用大焓降叶片及多级小焓降叶片的运行经济性进行对比。

This article mainly analyzes the application of different blade types in ultra-supercritical units,and gives a comparison of the efficiency of a certain stage between the low-enthalpy falling blade type and the large enthalpy falling blade type,and the change in efficiency when the angle of attack changes.In addition,this article relies on the ultra-supercritical retrofit unit to compare the operating economics of using large enthalpy drop blades and multi-stage small enthalpy drop blades.