Quasi-3D Aerodynamic Optimization Of Axial Compressor Airfoils

Airfoil design plays an important role in the compressor design process.After verifying the accuracy of the solver,the writer independently writes a Multi-Circle Arc(MCA)parametric program,and builds a rapid optimization design platform to optimize different airfoils.Some satisfactory results were obtained.The main work of this paper is as follows:Firstly,the simulation accuracy of MISES(Multiple blade Interacting Streamtube Euler Solver)is verified.MISES plays a decisive role in the reliability of the optimization results.We take four cascades working at typical conditions as the research objects,which simulated by MISES and Fluent.The simulation results compared with the experimental data show that MISES is in good agreement with Fluent and experimental data at quasi-3D(Q3D)flow field simulation,which verifies the reliability of MISES.Then a rapid optimization design platform for airfoils is built.On the premise of ensuring the optimization quality,the MCA parameterization program with few parameters and flexible modeling is used,and the MISES with fast solution speed is used for rapid optimization design.Genetic algorithm(GA)is used as the optimization algorithm to avoid local optimal solution,and optimization object is set flexibly for different conditions.Three different airfoils were optimized.After optimized,the performance of subsonic airfoil at the design point is improved,the working range is widened,and the performance of the transonic and supersonic airfoil is also improved,which proved the feasibility of the rapid optimization design platform and the working ability of MCA airfoils at full turbulent conditions.Finally,we optimized the airfoil working at low Reynolds number.Taking the V103 cascade as the research object,single-point optimization and multi-point optimization were carried out respectively.The results show the difference between them: after single-point optimization,the performance is improved significantly at low Reynolds number conditions,but the performance rarely changes at high Reynolds number;The performance at high Reynolds number and low Reynolds number is improved after multi-point optimization.The optimization results also show that MCA airfoils have great performance at low Reynolds number.