Results 111 to 120 of about 593 (134)

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

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

Entropy generation analysis of flow fields around a pump-jet propulsor mounted on SUBOFF

Physics of Fluids
A submarine's hydrodynamic performance is critical, as it directly influences its stealth, maneuverability, and endurance. A numerical investigation is conducted on a SUBOFF model equipped with a pump-jet propulsor (PJP) under varying inflow velocities. The numerical results demonstrate strong agreement with those reported by Posa et al.
Shuting Cai, Renfang Huang, Qiang Wu, Yi An, Yiwei Wang, Ning Li   +5 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

Effect of leading edge tubercles bionic blade of high speed pump jet propulsor on cavitation suppression

Physics of Fluids
The occurrence of cavitation in hydraulic machinery is a matter of significant concern, as it presents a substantial risk to the reliable functioning of pump jet propulsors. The point of this study is to find out how well bionic blades with different kinds of leading edge (LE) tubercles distribution stop cavitation in high-speed pump jet propulsors ...
Huairui Li, Gongchang Gan, Yuchen Duan, Rongsheng Zhu, Qiang Fu   +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

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

Influence of asymmetric pre-whirl stator spacing on unsteady characteristics of pump-jet propulsor

Ocean Engineering, 2023
Fuzheng Li, Guanshan Liu, Qiaogao Huang, Guocang Sun, Guang Pan, Denghui Qin   +5 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

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