Results 101 to 110 of about 628,564 (131)

On the space-time decomposition and reconstruction of the pump-jet propulsor flow field

Ocean Engineering, 2023
Shizhong Li, Fuzheng Li, Qiaogao Huang, Guang Pan, Shixian Wang, Xushun Tian   +5 more
openaire   +1 more source

Study on rotor–stator interaction in a pump-jet propulsor based on dynamic mode decomposition

Physics of Fluids
For a pre-swirl pump-jet propulsor (PJP), the stator inevitably induces the problem of rotor–stator interaction (RSI). In this paper, the mechanism of RSI in a PJP is analyzed through dynamic mode decomposition (DMD). The coherent flow structures and corresponding frequencies have been decomposed and analyzed.
Huiyao Li, Jiaqi Wang, Junyue Zhang, Zhenguo Zhang, Hongxing Hua   +4 more
openaire   +1 more source

Effects of propeller boss cap fins on hydrodynamics and flow noise of a pump-jet propulsor

Physics of Fluids
As an underwater thruster, the pump-jet propulsor (PJP) exhibits low radiation noise but generates significant line spectral noise in the low-frequency band. In this paper, we equipped the PJP hub with two types of propeller boss cap fins (PBCF): one fixed and the other rotating with the rotor.
Sijie Zheng, Qiaogao Huang, Li Zhou, Han Li, Xing He, Xinming Li   +5 more
openaire   +1 more source

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
openaire   +1 more source

Transient analysis of the pre-whirl pump-jet propulsor with different blade numbers

Ships and Offshore Structures, 2022
Fuzheng Li, Qiaogao Huang, Guang Pan, Bilin Wu, Han Li   +4 more
openaire   +1 more source

Cavitation evolution and radiation noise of a pre-swirl pump-jet propulsor in oblique flow

Physics of Fluids
During the submarine's surfacing process, the rotor of the pump-jet propulsor (PJP) is subjected to nonuniform hydrodynamic loads and cavitation, inducing cavitation-induced noise. In this paper, the hybrid Reynolds Averaged Navier–Stokes/Large Eddy Simulation method, the Schnerr–Sauer model and Ffowcs Williams–Hawkings equations are adopted to explore
Sijie Zheng, Qiaogao Huang, Han Li, Xing He, Xinming Li, Bo Lu, Li Zhou   +6 more
openaire   +1 more source

Sources and mechanisms of flow loss and hydroacoustics in a pre-swirl stator pump-jet propulsor

Physics of Fluids
Accurately identifying sources of flow loss and hydroacoustics and clarifying the mechanism of their generation are crucial for directing the optimal design of efficient and quiet pump-jet propulsors (PJPs). In this paper, numerical simulations of steady and unsteady flow are performed for a PJP equipped with pre-swirl stationary vanes, based on which ...
Chen Xu, Zhongyuan Du, Yijun Mao, Yanjie Zhao, Wei Zhao, Mengjie Li   +5 more
openaire   +1 more source

Numerical Radiated Noise Prediction of a Pre-Swirl Stator Pump-Jet Propulsor

Journal of Marine Science and Application, 2023
Han Li, Qiaogao Huang, Guang Pan
openaire   +1 more source

Serration of the duct trailing edge to affect the hydrodynamics and noise generation for a pump-jet propulsor

Physics of Fluids
Inspired by the silent gliding feather of owl wings, the trailing edge of the duct of a pump-jet propulsor was designed with a similar serrated structure in order to reduce noise generation. Two distinct serrated structures were proposed and evaluated using the detached eddy simulation method with the shear stress transport k−ω turbulence model.
Chun Yang, Cong Sun, Chao Wang, Hua-Dong Yao, Chunyu Guo, Qihui Yue   +5 more
openaire   +1 more source

Prediction of steady hydrodynamic performance of pump jet propulsor considering vessel body influence

Ocean Engineering, 2022
Cong Sun
exaly