Results 31 to 40 of about 593 (134)

Research on Optimization Design of Fully Parameterized Pump-Jet Propulsion [PDF]

, 2022
A pump-jet propulsion system is composed of rotor, stator, and duct. The stator has the front stator type and the rear stator type; the conduit also has the acceleration conduit and the deceleration conduit two forms.
Gu, Zhuhao, Li, Chuang, Li, Zhiyuan, Liu, Shewen, Lu, Yu, Shao, Wu, Wu, Chunxiao   +6 more
core   +1 more source

Studying the Impact of the Load Distribution Ratio on the Unsteady Performance of a Dual-Stage Pump-Jet Propulsor

Journal of Marine Science and Engineering
This study investigated the impact of different load distribution ratios between two rotors on the unsteady performance of dual-stage pump-jet propulsors using Computational Fluid Dynamics (CFDs) and experimental methods. The Shear Stress Transport (SST)
Jiansheng Zhang, Ning Liang, Jianwei Zhang, Linlin Cao, Dazhuan Wu, Wei Zhao, Hanqiao Han   +6 more
doaj   +1 more source

Comparative study on the wake dynamics of pump-jet and ducted propeller based on dynamic mode decomposition [PDF]

, 2023
A comparative study on the wake dynamics of a pump-jet propulsor (PJP) and a ducted propeller (DP) is conducted to investigate the effects of the pre-swirl stator and corresponding stator-rotor interaction on the wake evolution and destabilization ...
Geng, Linlin, Shen, Xi, van Esch, B.P.M. (Bart), Zhang, Desheng, Zhao, Xutao   +4 more
core   +1 more source

Experimental evaluation of pumpjet propulsor for an axisymmetric body in wind tunnel

International Journal of Naval Architecture and Ocean Engineering, 2010
Design of a Pump Jet Propulsor (PJP) was undertaken for an underwater body with axisymmetric configuration using axial flow compressor design techniques supported by Computational Fluid Dynamics (CFD) analysis for performance prediction.
Ch. Suryanarayana, B. Satyanarayana, K. Ramji, A. Saiju   +3 more
doaj   +1 more source

Cavitation Inside Enlarged And Real-Size Fully Transparent Injector Nozzles And Its Effect On Near Nozzle Spray Formation [PDF]

, 2011
The effect of string cavitation in various transparent Diesel injector nozzles on near nozzle spray dispersion angle is examined. Additional PDA measurements on spray characteristics produced from real-size transparent nozzle tips are presented ...
Arcoumanis, C., Gavaises, M., Mitroglou, N., Nouri, J. M.   +3 more
core  

Study on noise reduction of pump-jet propulsors based on porous media stator leading edges

Zhongguo Jianchuan Yanjiu
ObjectiveTo suppress hydrodynamic noise at the source, a noise reduction method for pump-jet propulsors based on porous media is proposed.MethodsBy replacing the metallic leading edges of the stator blades of the pump-jet propulsor with porous materials,
Jianguo ZHENG, Hao WEN, Yijun MAO
doaj   +1 more source

Experimental and numerical investigation of the impacts of rotor tip-rake on excitation forces of pump-jet propulsors

Journal of Hydrodynamics, 2023
Abstract The tip-clearance flow in a pump-jet propulsor exerts great impacts on the fluctuating pressures and resultant unsteady forces, which are important sources of structural vibrations and radiated noise underwater. The blade geometry close to the tip is an important factor determining the vortex strength in the tip-clearance flow.
Xue-Qin Ji, Xiao-Song Zhang, Chen-Jun Yang, Xiao-Qian Dong   +3 more
openaire   +1 more source

Computational Fluid Dynamics (CFD) Simulation of Mesh Jet Devices for Promising Energy-Saving Technologies [PDF]

, 2022
This paper discusses the development of mesh jet devices for hybrid turbines, including developing Euler's ideas, and considers a new patented version of a mesh jet device designed to create guiding devices for turbines. The research methods are based on
Balaka, Nikolay N., Frankov, Mikhail A., Gryaznova, Inna V., Mokhov, Mikhail A., Sazonov, Yuri A., Tumanyan, Khoren A., Voronova, Victoria V.   +6 more
core   +1 more source

Experimental investigation of unsteady force suppression in a pump-jet rotor using oscillating stator trailing edge

Zhongguo Jianchuan Yanjiu
ObjectiveUnsteady forces generated by pump-jet rotors are a key factor affecting the vibration and noise levels of underwater vehicles. These forces not only induce structural vibrations through coupling between the propeller, shafting, and hull systems,
Wanghao TANG, Junjie XU, Xiuchang HUANG
doaj   +1 more source

Development of a standard series for pump-jet propulsors and data-driven regression for performance prediction

International Journal of Naval Architecture and Ocean Engineering
Pump-jet propulsors are widely used in marine applications because of their advantages in propulsive efficiency, cavitation performance, and low noise performance.
Jinghan Su, Youjiang Wang, Fang Li, Li Zhou   +3 more
doaj   +1 more source