Numerical study on variation characteristics of the unsteady bearing forces of a propeller with an external transverse excitation
| Autor: | Ren-feng Wang, Minhua Shu, Yunxiang You, Tianqun Hu, Ke Chen |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Frequency response Bearing (mechanical) Turbulence Mechanical Engineering Propeller 020101 civil engineering 02 engineering and technology Mechanics Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas 0201 civil engineering law.invention Transverse plane Amplitude Mechanics of Materials law Modeling and Simulation Frequency domain 0103 physical sciences Excitation |
| Zdroj: | Journal of Hydrodynamics. 31:400-412 |
| ISSN: | 1878-0342 1001-6058 |
| Popis: | The unsteady bearing forces of a propeller can be significantly affected by external transverse excitations. This paper numerically studies the unsteady variation characteristics of the bearing forces of a three-blade conventional propeller with external transverse excitations or without excitations. The dynamic mesh method combined with the RANS turbulence model is employed. The numerical simulation shows the frequency response in the frequency domain of KT, KQ under external transverse excitations. The frequency of the response is found always equal to twice of the excitation frequency. If the amplitude of the external transverse excitation keeps constant, the amplitude of the response increases with the increase of the excitation frequency. If the excitation frequency keeps constant, the amplitude of the response increases with the increase of the excitation amplitude, in a power-law relationship. The pressure distribution can be significantly affected by the external transverse excitation, leading to a high irregularity of the flow field. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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