Results 101 to 110 of about 593 (134)

Numerical Design Study of Duct and Stator for a Pump-Jet Propulsor

Volume 6B: Ocean Engineering, 2020
Abstract The pump-jet propulsor consists of a duct, a rotor and stators which are installed upstream of the rotor to provide pre-swirl flow or downstream of rotor to absorb the kinetic energy in the flow. The strong interactions between the three components and the vehicle are closely related to their design and exert great effect on ...
Chen-Jun Yang, Xiaoqian Dong, Xueqin Ji
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The scale effects on the open water performance of a pump-jet propulsor

Journal of Marine Science and Technology, 2021
In this work, the scale effects on the open water performance of a pump-jet propulsor (PJP) with pre-swirl stator are considered and implemented based on systematic numerical calculations. With considering the effects of mesh density and time-step size, the unsteady open water performance at the design advance coefficient both in full scale and model ...
Han Li, Qiaogao Huang, Guang Pan, Xinguo Dong   +3 more
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Transient velocity field prediction and uncertainty quantification of pump-jet propulsor using variational Bayesian neural networks

Ocean Engineering, 2023
Chengcheng Qiu, Qiaogao Huang, Guang Pan
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Wake flow characteristics and unsteady performance of a pump-jet propulsor under hull condition

Physics of Fluids, 2022
The propulsor is one of the main noise sources of an underwater vehicle. The pump-jet operating under hull condition is in a typical non-uniform strong anisotropic turbulent flow field. In this paper, the wake flow characteristics and unsteady performance of a pump-jet propulsor under hull condition are numerically investigated.
Shuaikang Shi, Wanghao Tang, Xiuchang Huang   +2 more
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Tip-clearance pressure fluctuations between conventional pump-jet propulsor and pump-jet propulsor with rotor blade crown in non-uniform inflow

Physics of Fluids
The suppression of the pressure fluctuations in the tip clearance of the pump-jet propulsor is of great significance in improving its noise radiation level. This study considers adding rotor blade crown structure to propose a new type of pump-jet propulsor.
Lin Xue, Donglin Zou, Chunxiao Jiao, Xiaoqian Dong, Zhongli Zhang, Na Ta, Zhushi Rao   +6 more
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Dynamic mode decomposition and reconstruction of the transient pump-jet propulsor wake

Physics of Fluids
Comprehensively grasping the wake dynamics of pump-jet propulsor (PJP) lies at the core of developing and fine-tuning future PJP design, particularly the exciting forces suppression and noise reduction. In this work, a pre-swirl stator PJP is considered to investigate its wake dynamics and evolution mechanics.
Xinming Li, Han Li, Sijie Zheng, Xing He, Guang Pan, Qiaogao Huang   +5 more
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Numerical analysis of unsteady hydrodynamic performance of pump-jet propulsor in oblique flow

2019
In this study, the SST k-omega turbulence model and the sliding mesh technology based on RANS method has been adopted to simulate the exciting force and hydrodynamics of a pump-jet propulsor in different oblique flow angles (0°, 10°, 20°, 30°) and different advance ratio (J=0.95, J=1.18, J=1.58). The full structured grid and full channel model has been
Qiu, Chengcheng, Pan, Guang, Shi, Yao
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Numerical calculation method of a co-rotating two-stage pump-jet propulsor

Physics of Fluids
Vibration, noise, and cavitation remain challenges for underwater propulsors. Besides blade design, a multi-stage structure is one of the ways to solve these problems. Based on the concept above, this paper proposes a co-rotating two-stage pump-jet propulsor.
Jianwei Zhang, Ning Liang, Yongle Ding, Jian Li, Linlin Cao, Dazhuan Wu   +5 more
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Radiated noise from cavitation bubble volume pulsation in a shaftless pump-jet propulsor

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
The radiated noise resulting from cavitation bubble volume pulsations is a critical component of cavitation-induced noise during propulsor operation. This paper investigates the radiated noise generated by cavitation bubble volume pulsations in a shaftless pump-jet propulsor.
Houlin Liu, Yang Zhao, Minggao Tan, Runan Hua, Xianfang Wu   +4 more
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Unsteady flow structures and noise characterization under stator skew in pump-jet propulsors

Physics of Fluids
This study explores how stator skew affects pump-jet propulsor (PJP) performance. A hybrid Reynolds-averaged Navier–Stokes/large eddy simulation strategy is utilized to analyze the flow, and the Ffowcs Williams–Hawkings equation is applied for noise calculation.
Fuzheng Li, Qiaogao Huang, Jingyang Li, Guang Pan, Wenqian Hao   +4 more
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