Multi-objective Optimization of Inlet Duct of Water-jet Propulsion Based on Response Surface Method

doi:10.3969/j.issn.1000-1093.2020.10.017

Abstract

Abstract: The key structural parameters of inlet duct are optimized to improve the flow performance of inlet duct of water-jet propulsion. The inclination angle α and radius R_T are optimized for higher efficiency η of inlet duct, higher weighted average angle θ of outlet velocity and non-uniformity coefficient ξ of lower outlet velocity in the cases of given diameter D, height H, and overall length L of inlet duct. There are 35 sets of sample points in design space selected by using central composite design and Latin hypercube sampling design method. Quadratic polynomials are employed to construct a response surface model based on the sample points, which reflects the relationship between design and target variables. The Pareto optimal solution set is obtained by the multi-objective genetic algorithm during the optimization process. Good optimization was obtained.The research results show that the efficiency of duct is increased from 91.2% to 94.1%, the outlet velocity weighted average angle is increased from 82.5° to 87.1°, and the non-uniformity coefficient of outlet velocity is decreased from 0.152 to 0.068.

Key words: water-jetpropulsion, inletduct, optimizationdesign, responsesurfacemethod, multi-objectivegeneticalgorithm

CLC Number:

U664.34

ZHANG Fuyi, WU Qin, ZHAO Xiaoyang, LIU Ying, WANG Guoyu. Multi-objective Optimization of Inlet Duct of Water-jet Propulsion Based on Response Surface Method[J]. Acta Armamentarii, 2020, 41(10): 2071-2080.

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