In order to optimize the internal structure of the Venturi steam trap and improve its adaptive adjustment performance,the Central-Composite response surface model and genetic algorithm were used to optimize the internal structure of the Venturi steam trap,aiming at the maximum hydrophobic range ratio of Venturi steam trap.The structure was analyzed before and after optimization.The results show that the optimization design by proxy model greatly reduces the amount of finite element calculation and improves the optimization efficiency.The optimal structural parameters obtained by genetic algorithm are as follows:the contraction angle is 20.8°,the throat length is 4.3 mm,and the diffusion angle is 4.6°.The three geometric parameters of contraction angle,throat length and diffusion angle are interrelated.The diffusion angle is the most effective parameter affecting the hydrophobic range ratio.The diffusion Angle has a negative effect on the hydrophobic range ratio.Throat length and contraction Angle have nonlinear influence on the hydrophobic range ratio.The contraction Angle is the smallest parameter affecting the hydrophobic range ratio.
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