Research On The Blade Design Method Base On The S1S2Flow Field Theory

This paper developed a rapid leaf design software, to solve the flow field flow surface S1/S2solve the problem using the streamline curvature method in the design, while using the NewtonRaphson algorithm for solving the two-dimensional cascade.According to initial conditions is calculated separately for each station solving speed, thereby toobtain parameters for the entire flow field. S2stream surface computing stations set up only betweenthe blades, calculable inlet/outlet flow angle distribution of radial along the stream surface accordingto S2stream surface calculations. S2stream surface calculations by comparison with numericalexample, static transfer surface of the rotor flow angle and pressure distribution can fit well. S1calculated inlet/outlet flow angle calculation are given in S2, and taking into account the flow angle,Cascades and front/trailing edge calculate the effect of S1stream surface grid, the grid needs to bepretreated.The Newton Raphson method is applied to two-dimensional inverse problem of airfoil design.Firstly, giving a target pressure distribution, then we can quickly design a two-dimensionalcompressor cascade after several iterations of inverse problems. The pressure distribution of cascadesurface is similar to the target distribution.Applied S1, S2computing software and S1design software, developed a semi-inverse problemof compressor blade design software. It designs compressor blades quickly. Compared with E3compressor test results the maximum efficiency difference of3%and the highest efficiency pointpressure ratio difference of0.11%.