基于推力功势的航空燃气轮机故障性能研究

利用热力学第二定律的功势转化指标之一的推力功势转化性能指标,对航空燃气轮机在性能故障下进行了数学建模,采用了小偏差的方法推导出了故障性能系数矩阵,从推力功势转化性能和传统的效率表示的性能对比、各部件之间的推力功势转化性能比较、燃气轮机系统推力功势转化性能这三个方面进行了分析研究.结果表明:推力功势转化性能指标从能源转化为有用功的角度更好地衡量燃气轮机的故障性能.为进一步研究各种故障下燃气轮机的能源转化和利用的性能趋势,奠定基础. 

Research on aero gas turbine performance in the condition of fault based on thrust work potential

The mathematical model of the gas turbine performance in the condition of fault was established by using the thrust work potential transfer function,which is a figure of merit of the work potential based on the second law of thermodynamics.The performance matrix of fault model was derived by using the small deviation method.The thrust work potential transfer function was compared with the efficiency,which was the traditional function.The thrust work potential transfer function among the components was compared.The thrust work potential transfer function of the gas turbine system was analyzed.The results show that the thrust work potential transfer function can express the gas turbine performance wonderfully in the point of view of transferring the work potential contained in fuel into useful thrust work.This lays a foundation for the future study of the capability of the gas turbine under the conditions of all kinds of faults.