A New Algorithm Method of Gas Turbine Gas Path Diagnosis

To increase the accuracy of linear gas path analysis(GPA) method,a new method to evaluate the partial differential equations was presented.With recent research,parameter deviations caused by re-matching procedure is the main reason in the inaccuracy of simultaneous differential equations.Therefore,matching coefficients are introduced to isolate and eliminate these matching deviations with delta pressure ratios.The ICM yielded by the new method can both increase the accuracy of measurements prediction and parameter deviations estimation.By utilizing the computer model of the PG9171E engine,the new method is demonstrated.