Results 21 to 30 of about 628,564 (131)
Numerical study of the wake evolution behind a shaftless pump-jet propulsor
Applied Ocean ResearchTo identify the evolution of the vortices hidden in the wake behind a shaft-less pump-jet propulsor, the delayed detached eddy simulation is performed on a computational domain comprising 22.8 million cells to analyze the wake evolution behind a ...
Peng Li +3 more
doaj +2 more sources
Applied SciencesThe potential value of the new type of vector propulsor in submarine movement has been confirmed. However, some key mechanical issues are not fully understood, especially the hydrodynamic characteristics during oblique motion.
Tongqing Xue +5 more
doaj +2 more sources
Research on cavitation performance of a pump-jet propulsor and its interaction with vortexes
Results in EngineeringThe pump-jet propulsor (PJP) has become a key propulsion system for underwater vehicles due to its high efficiency and low noise characteristics. However, its cavitation issues under high-speed or non-uniform inflow conditions severely threaten its ...
Sijie Zheng +7 more
doaj +2 more sources
Influence of Blade Hub Diameter Ratio on the Acoustic Performance in a Shaftless Pump-jet Propulsor [PDF]
Journal of Applied Fluid MechanicsThe complex internal structure of a shaftless pump-jet propulsor presents significant challenges for reducing flow-induced noise and improving hydrodynamic performance.
Y. Zhao, H. Liu, X. Wu, M. Tan, Z. Lu
doaj +2 more sources
International Journal of Naval Architecture and Ocean EngineeringPump-jet propulsors are widely used in marine applications because of their advantages in propulsive efficiency, cavitation performance, and low noise performance.
Jinghan Su +3 more
doaj +2 more sources
Numerical Study of Scale Effects of Tip Clearance Flow Field of Pump-Jet Propulsor
Shanghai Jiaotong Daxue xuebaoDue to the tip clearance of the pump-jet propulsor (PJP), the flow field characteristics in the PJP are more complicated. To explore the influence of scale effects on the tip clearance flow field of PJP, the unsteady Reynolds-averaged Navier-Stokes ...
YANG Chun, GUO Chunyu, SUN Cong, WANG Chao, YUE Qihui
doaj +2 more sources
4D Printing of Humidity‐Driven Seed Inspired Soft Robots
Advanced Science, Volume 10, Issue 9, March 24, 2023., 2023 The internal structure and biomechanics of Pelargonium appendiculatum (L.f.) wild seeds are investigated to develop a model for the design and 4D printing of a soft robot. The robot mimics the movement and performances of the natural seed. Driven by environmental humidity, the artificial seed can explore a sample soil, adapting its morphology to ...
Luca Cecchini +5 more
wiley +1 more source
A Review of Progress and Hydrodynamic Design of Integrated Motor Pump-Jet Propulsion
Applied Sciences, 2022 The integrated motor pump-jet (IMP) propulsion system is a form of modern underwater vehicle propulsion that uses a modular design paradigm. The integrated motor propulsor is a compact construction consisting of a permanent magnet (PM) and a pump-jet ...
Qiao Li +2 more
doaj +1 more source
Design, build, test and flight of the world's fastest electric aircraft
IET Electrical Systems in Transportation, Volume 12, Issue 4, Page 380-402, December 2022., 2022 Project ACCEL pushed the limits of energy management, thermal management, and mass saving, while maintaining measured safety for the pilot and crew to ultimately achieve world record‐breaking flights. The blank sheet design of the ESS and powertrain allowed for an appropriately optimised solution, swiftly moving into physical testing allowed for rapid ...
Timothy Bingham +3 more
wiley +1 more source
Journal of Marine Science and Engineering, 2021 Reducing the noise of the underwater propulsor is gaining more and more attention in the marine industry. The pump-jet propulsor (PJP) is an extraordinary innovation in marine propulsion applications.
Han Li +4 more
doaj +1 more source