Numerical simulation of fouling deposition in compressor rotor

Three-dimensional numerical simulation to study the influence of fouling deposition on compressor rotors was carried out.As a representative of realistic compressor rotor,the NASA Rotor 37 was considered to perform a numerical investigation and by comparing with the experimental data available from literature,the reliability of commercial CFD(computational fluid dynamcics) computational code was validated.The results show that computed performance maps achieve a good agreement with the experimental data,so it’s practicable using the means of numerical simulations on the study.Then the influence of different fouling deposit degree on compressor rotor performance was simulated by adding surface roughness and thickness on the blade and end-wall.The results indicated that increasing surface roughness and thickness on the blade can make total pressure ratio and isentropic efficiency decrease,and increasing wall roughness can make flow reduce,rotor stable operating range transfer to small flow.Also,increasing blade thickness can make stable operating range decreased obviously,the flow reduced observably at the blockage point,which lead to increase on the deterioration degree of rotor performance.