Imam Hussein University Aerospace Mechanics 2645-5323 19 4 2023 08 23 Thermodynamic Simulation of Fouling and Erosion in an Industrial Gas Turbine for Power Generation Applications Thermodynamic Simulation of Fouling and Erosion in an Industrial Gas Turbine for Power Generation Applications 53 69 208114 FA Ali Nekoonam Ph.D. Student, Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran 0000-0002-7616-2378 Morteza Montazeri Corresponding author: Professor, Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran 0000-0001-7003-903X Journal Article 2023 03 04 In this research, the performance deterioration caused by the degradation of the main gas path components is simulated for the IGT25 industrial gas turbine. To this aim, after developing a thermodynamic model of IGT25 and verifying the model with real data it is applied to simulate the performance deterioration of the gas turbine. Considering the fouling and erosion as two common gas path faults, these two faults are simulated by deviating the flow capacity and isentropic efficiency and their effects on the performance parameters in the power turbine speed control mode are investigated. The results reveal that the occurrence of fouling on the compressor blade in the investigated control mode leads to a decrease in the gas generator turbine speed, fuel flow, compressor exhaust temperature, gas generator turbine inlet temperature, power turbine inlet temperature and exhaust gas temperature contrarily an increase occurs in air mass flow, compressor exit pressure and power turbine inlet pressure. According to the results, the maximum deviation from the normal condition due to fouling and erosion of the compressor blades observed in the exhaust gas temperature, which is 3.8% and 2.2%, respectively. It is found that the operating conditions of the gas turbine affect the amount of deviation of the performance parameters when a gas path fault occurs. In this research, the performance deterioration caused by the degradation of the main gas path components is simulated for the IGT25 industrial gas turbine. To this aim, after developing a thermodynamic model of IGT25 and verifying the model with real data it is applied to simulate the performance deterioration of the gas turbine. Considering the fouling and erosion as two common gas path faults, these two faults are simulated by deviating the flow capacity and isentropic efficiency and their effects on the performance parameters in the power turbine speed control mode are investigated. The results reveal that the occurrence of fouling on the compressor blade in the investigated control mode leads to a decrease in the gas generator turbine speed, fuel flow, compressor exhaust temperature, gas generator turbine inlet temperature, power turbine inlet temperature and exhaust gas temperature contrarily an increase occurs in air mass flow, compressor exit pressure and power turbine inlet pressure. According to the results, the maximum deviation from the normal condition due to fouling and erosion of the compressor blades observed in the exhaust gas temperature, which is 3.8% and 2.2%, respectively. It is found that the operating conditions of the gas turbine affect the amount of deviation of the performance parameters when a gas path fault occurs. https://maj.ihu.ac.ir/article_208114_a0bee23844abe6ffa41f9687448186cf.pdf