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Multi-objective optimization of the flush-type intake duct for a waterjet propulsion system
Huang RF(黄仁芳)1; Dai YX2; Luo XW3; Wang YW(王一伟)1; Huang CG(黄晨光)1
Corresponding AuthorLuo, Xianwu( ; Wang, Yiwei(
AbstractThe intake duct is an important component of waterjet propulsion system and its hydraulic performance is directly connected with the capability of the waterjet pump and even the propulsion performance of the system. In order to optimize the flush-type intake duct, the present paper proposes a multi-objective optimization system including Design of Experiments (DOE), Computational Fluid Dynamics (CFD), three-dimensional parametric design, approximate model, the modified Non-dominated Sorting Genetic Algorithm-II (NSGA-II) and a Technique for Ordering Preferences by Similarity to Ideal Solution (TOPSIS). The nonuniformity and perpendicularity of outflow, and hydraulic efficiency for the intake duct are treated as the optimization objectives with four geometrical parameters as the design variables. Local sensitivity analyses indicate that the optimization objectives are significantly affected by the inclination angle and slightly affected by the lip vertical distance of the intake duct. During IVR = 0.3-0.8, the outflow quality and hydraulic efficiency of the optimised intake duct are greatly improved. The nonuniformity after optimization decreases by 27.8% and perpendicularity increases by 3.07% at the design condition of IVR = 0.7 and V-s = 19.49 m/s. Based on the flow at the outlet plane of intake duct, the pressure distribution after optimization is very uniform and the tangential velocity is small without obvious secondary flow. During the application to a mixed-flow waterjet propulsion system at various navigation speeds, the nonuniformity of the optimized intake duct decreases by 20.4% and perpendicularity increases by 4.11% on average, demonstrating that the optimized intake duct performs a better outflow quality. It is also noted that the non-uniform flow from the intake duct mainly affects pressure distribution on the suction surface of impeller blade and causes different shaft power.
KeywordIntake duct Waterjet propulsion Multi-objective optimization
Indexed BySCI ; EI
WOS IDWOS:000487564700031
WOS Research AreaEngineering ; Oceanography
WOS SubjectEngineering, Marine ; Engineering, Civil ; Engineering, Ocean ; Oceanography
Funding ProjectNational Natural Science Foundation of China[51776102] ; National Natural Science Foundation of China[11772340] ; Science and Technology on Water Jet Propulsion Laboratory[61422230103162223004] ; State Key Laboratory of Hydroscience and Engineering[sklhse-2017-E-02]
Funding OrganizationNational Natural Science Foundation of China ; Science and Technology on Water Jet Propulsion Laboratory ; State Key Laboratory of Hydroscience and Engineering
ContributorLuo, Xianwu ; Wang, Yiwei
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China;
2.Sci & Technol Water Jet Prop Lab, Shanghai 200011, Peoples R China;
3.Tsinghua Univ, Dept Energy & Power Engn, Beijing 100084, Peoples R China
Recommended Citation
GB/T 7714
Huang RF,Dai YX,Luo XW,et al. Multi-objective optimization of the flush-type intake duct for a waterjet propulsion system[J]. OCEAN ENGINEERING,2019,187:14.
APA 黄仁芳,Dai YX,Luo XW,王一伟,&黄晨光.(2019).Multi-objective optimization of the flush-type intake duct for a waterjet propulsion system.OCEAN ENGINEERING,187,14.
MLA 黄仁芳,et al."Multi-objective optimization of the flush-type intake duct for a waterjet propulsion system".OCEAN ENGINEERING 187(2019):14.
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