In order to correct the gas turbine parameter and eliminate the influence of environmental temperature and pressure when assessing the gas turbine engine performance

an empirical method was proposed. The correction exponents were determined by the slope of regression line to the ambient temperature (or ambient pressure)

the average of ambient temperature (or ambient pressure) and the average of target parameter

to correct the target parameter. The test data analyses showed that the proposed empirical correction method can more effectively eliminate the influence of ambient temperature and ambient pressure compared with regular correction method

and the correlation coefficient of empirical corrected performance parameter and the ambient temperature (or ambient pressure) was close to zero. The empirical corrected parameters can reflect the state change trend of gas turbine itself well

making it convenient for performance assessment.