Direct Sailing Variable Acceleration Dynamics Characteristics of Water-Jet Propulsion with a Screw Mixed-Flow Pump
Han, Wei1,2; Shang, Ting1; Su, Min3; Gong, Chengyong1; Li, Rennian1,2; Meng, Bin4
2019-10
Source PublicationAPPLIED SCIENCES-BASEL
Volume9Issue:19
AbstractStrong nonlinearity and the relevance of time-varying dynamic parameters in the maneuverable process of water-jet propulsion were major problems encountered in the prediction of variable acceleration dynamics characteristics. The relationships between the thrust and rotation speed of a screw mixed-flow pump, drag and submerged speed of water-jet propulsion were obtained from flume experiments and numerical calculations, based on which a dynamic model of pump-jet propulsion was established in this paper. As an initial condition, the numerical solution of the submerged speed with respect to time was inputted to computational fluid dynamics (CFD) for unsteady calculation based on a user-defined function (UDF). Thus, the relationships between the acceleration, drag, net thrust, propulsion torque and efficiency with respect to time were revealed. The results indicate that the relationship between the thrust and rotational speed of a water-jet propeller is a quadratic function, which agrees well with the experimental values. The variation of submerged speed with respect to time satisfies a hyperbolic tangent function distribution. The acceleration increases sharply at the beginning and then decreases gradually to zero, especially at high rotation speeds of the water-jet pump. The variations in drag and propulsion efficiency with respect to time coincide with the step response of a second-order system with critical damping. The method and results of this study can give a better understanding of the changes in dynamic parameters such as velocity, acceleration, thrust, and drag during the acceleration of a pump-jet submersible and helped to estimate the effects of pump performance on water-jet propulsion kinetic parameters.
Keywordwater-jet propulsion screw mixed-flow pump variable acceleration dynamics characteristics
DOI10.3390/app9194194
Indexed BySCI
Language英语
Funding ProjectNational Key RAMP;D Program Projects of China[2018YFB0606100] ; National Natural Science Foundation of China[51669012][51579125]
WOS Research AreaChemistry ; Engineering ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Engineering, Multidisciplinary ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000496258100252
PublisherMDPI
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64141
Collection能源与动力工程学院
电气工程与信息工程学院
Corresponding AuthorShang, Ting; Su, Min
Affiliation1.Lanzhou Univ Technol, Dept Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China
2.Lanzhou Univ Technol, Key Lab Fluid Machinery & Syst, Lanzhou 730050, Gansu, Peoples R China
3.Lanzhou Univ Technol, Dept Elect & Informat Engn, Lanzhou 730050, Gansu, Peoples R China
4.Gansu Diantou Jiudianxia Water Conservancy Hinge, Dinxi 730500, Peoples R China
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
GB/T 7714
Han, Wei,Shang, Ting,Su, Min,et al. Direct Sailing Variable Acceleration Dynamics Characteristics of Water-Jet Propulsion with a Screw Mixed-Flow Pump[J]. APPLIED SCIENCES-BASEL,2019,9(19).
APA Han, Wei,Shang, Ting,Su, Min,Gong, Chengyong,Li, Rennian,&Meng, Bin.(2019).Direct Sailing Variable Acceleration Dynamics Characteristics of Water-Jet Propulsion with a Screw Mixed-Flow Pump.APPLIED SCIENCES-BASEL,9(19).
MLA Han, Wei,et al."Direct Sailing Variable Acceleration Dynamics Characteristics of Water-Jet Propulsion with a Screw Mixed-Flow Pump".APPLIED SCIENCES-BASEL 9.19(2019).
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