TY - JOUR AU - Plis, Marcin AU - Rusinowski, Henryk PY - 2016/10/29 TI - Mathematical modeling of an axial compressor in a gas turbine cycle JF - Journal of Power Technologies; Vol 96 No 3 (2016) KW - Mathematical modelling, Gas turbine, Axial compressor, Empirical functions, Inlet guide vanes of compressor N2 - Contemporary thermal diagnostic systems of power units require advanced computational tools, including mathematical models. These models should have a simple structure and short computing time. These conditions are satisfied by models that include mass and energy balances as well as additional empirical functions whose coefficients are estimated by using the measurement results. This paper presents a simulation model of an axial compressor which forms part of a gas turbine unit with a rated output of 125.4 MW. The model was developed with the use of a generalized compressor map, describing the relationship between corrected air mass flow rate, pressure ratio, isentropic efficiency and corrected rotational speed. The model encompasses the empirical formula for compressor internal efficiency, which additionally considers the effect of variation of the angle of inlet guide vanes. The unknown values of empirical coefficients which appear in this equation were estimated on the basis of operating data. The calculation results obtained were compared with the measurement results. The quality of the model prediction was evaluated and conclusions were drawn. UR - https://papers.itc.pw.edu.pl/index.php/JPT/article/view/951