| Influence on the hydrodynamic performance of a variable vector propeller of different rules of pitch angle change |
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| 作者姓名： | CHANG Xin ZOU Jing-xiang HUANG Sheng GUO Chun-yu |
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| 作者单位： | CHANG Xin1，2，ZOU Jing-xiang1，HUANG Sheng2 and GUO Chun-yu2 1. Research Station on Mechanics for Postdoctoral Fellows，Harbin Institute of Technology，Harbin 150001，China2. College of Shipbuilding Engineering，Harbin Engineering University，Harbin 150001，China |
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| 摘 要： | To design a more effective blade pitch adjustment mechanism,research was done on changes to the hydrodynamic characteristics of VVPs(Variable Vector Propeller) caused by different rules for changing pitch angle. A mathematical method for predicting the hydrodynamic characteristics of a VVP under unsteady conditions is presented based on the panel method. Mathematical models for evaluation based on potential flow theory and the Green theorem are also presented. The hydrodynamic characteristics are numerically predicted. To avoid gaps between panels,hyperboloidal quadrilateral panels were used. The pressure Kutta condition on the trailing edge of the VVP blade was satisfied by the Newton-Raphson iterative procedure. The influence coefficients of the panels were calculated by Morino's analytical formulations to improve numerical calculation speed,and the method developed by Yanagizawa was used to eliminate the point singularity on derivation calculus while determining the velocities on propeller surfaces. The calculation results show that it's best for the hydrodynamic characteristics of the VVP that pitch angle changes follow the sine rule.
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| 关 键 词： | 可变向量推进器 板块法 不稳定性 水推动力 |
| 文章编号： | 1671-9433（2007）04-0032-05 |
| 收稿时间： | 2007-04-29 |
Influence on the hydrodynamic performance of a variable vector propeller of different rules of pitch angle change |
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| CHANG Xin ZOU Jing-xiang HUANG Sheng GUO Chun-yu.Influence on the hydrodynamic performance of a variable vector propeller of different rules of pitch angle change[J].Journal of Marine Science and Application,2007,6(4):32-36. |
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| Authors: | Xin Chang Jing-xiang Zou Sheng Huang Chun-yu Guo |
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| Institution: | (1) Research Station on Mechanics for Postdoctoral Fellows, Harbin Institute of Technology, Harbin, 150001, China;(2) College of Shipbuilding Engineering, Harbin Engineering University, Harbin, 150001, China |
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| Abstract: | To design a more effective blade pitch adjustment mechanism,research was done on changes to the hydrodynamic characteristics of VVPs(Variable Vector Propeller) caused by different rules for changing pitch angle. A mathematical method for predicting the hydrodynamic characteristics of a VVP under unsteady conditions is presented based on the panel method. Mathematical models for evaluation based on potential flow theory and the Green theorem are also presented. The hydrodynamic characteristics are numerically predicted. To avoid gaps between panels,hyperboloidal quadrilateral panels were used. The pressure Kutta condition on the trailing edge of the VVP blade was satisfied by the Newton-Raphson iterative procedure. The influence coefficients of the panels were calculated by Morino's analytical formulations to improve numerical calculation speed,and the method developed by Yanagizawa was used to eliminate the point singularity on derivation calculus while determining the velocities on propeller surfaces. The calculation results show that it's best for the hydrodynamic characteristics of the VVP that pitch angle changes follow the sine rule. |
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| Keywords: | variable vector propeller panel method unsteady uneven in-flow distribution |
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