Axial flow turbine one-dimensional performance direct problem evaluation method based on variable specific heat calculation

The invention provides an axial flow turbine one-dimensional performance positive problem evaluation method based on variable specific heat calculation. Turbine section calculation is divided into three key section calculation, turbine inlet section calculation and turbine movable blade inlet and outlet section calculation. In order to achieve axial flow turbine one-dimensional characteristic positive problem calculation of variable specific heat calculation, firstly, variable specific heat is analyzed, and three turbine key sections are calculated based on a variable specific heat relation. According to the method, the variable specific heat factor can be effectively utilized to calculate each section parameter of the turbine, the accuracy of one-dimensional performance positive problem evaluation of the axial flow turbine is improved, and the method has practical engineering value. 本发明提供一种基于变比热计算的轴流涡轮一维性能正问题评估方法，涡轮截面计算分为三个关键截面计算，涡轮进口截面计算与涡轮动叶进口与出口截面计算；为了实现变比热计算的轴流涡轮一维特性正问题计算，首先对变比热进行分析，基于变比热关系，对三个涡轮关键截面进行计算