Journal ArticleDOI
Numerical analysis on the wake dynamics of a ducted propeller
Qin Zhang,Rajeev K. Jaiman +1 more
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TLDR
In this paper, the wake dynamics and instabilities of a ducted propeller are numerically investigated at a Reynolds number of R e n = 1.765 × 10 5, and the numerical simulation is achieved by employing a hybrid RANS/LES model and the transient sliding mesh approach.About:
This article is published in Ocean Engineering.The article was published on 2019-01-01. It has received 48 citations till now. The article focuses on the topics: Ducted propeller & Vortex.read more
Citations
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Experiments and CFD for the propeller wake of a generic submarine operating near the surface
TL;DR: An experimental and computational fluid dynamics (EFD and CFD) study of the appended notional submarine DARPA Suboff fitted with the 7-bladed E1658 propeller and operating near the free surface is presented in this paper.
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The transient prediction of a pre-swirl stator pump-jet propulsor and a comparative study of hybrid RANS/LES simulations on the wake vortices
TL;DR: In this paper, a comparative study on the wake vortices generated by the hybrid RANS/LES family at the design operating condition J = 1. 0 was conducted. And the IDDES, SDES, and SBES showed the prominent resolving ability in vortice motion and evolution than the SAS and DDES.
Journal ArticleDOI
Numerical investigation on noise reduction mechanism of serrated trailing edge installed on a pump-jet duct
Yu Sun,Wei Liu,Tian-yu Li +2 more
TL;DR: In this article, the authors used large eddy simulation (LES) method to predict the hydrodynamic performance of the pump-jet propulsion and added the FW-H acoustic model into the noise performance simulation after the flow stabilization.
Journal ArticleDOI
Transient analysis of the fluid flow on a pumpjet propulsor
Han Li,Guang Pan,Qiaogao Huang +2 more
TL;DR: In this article, the authors discussed the transient characteristic of PJP and gave a comparative analysis between steady and transient simulations using Reynolds-averaged Navier-Stokes equations (RANSE) with a focus on the transient flow field and tip clearance effect.
References
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Journal ArticleDOI
Scale Effects on Open Water Characteristics of a Controllable Pitch Propeller Working within Different Duct Designs
TL;DR: In this article, a detailed investigation of the scale effects on the open water characteristics of a moderately skewed 4-bladed controllable pitch propeller is presented, where the influence of duct design on the flow characteristics, as well as the blade and duct forces in model and full scale conditions, has been studied using three ducts of different design.
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Large-Eddy Simulations of Submarine Propellers
TL;DR: In this article, an immersed boundary formulation is utilized to perform large-eddy simulations of a propeller in open-water conditions and in the presence of an upstream appendage at zero incidence.
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Industrial application of RANS modelling: capabilities and needs
TL;DR: A brief review of turbulence modelling is provided, then applications of increasing complexity involving adverse pressure gradients, separation and complex 3-D systems are presented to illustrate the strengths of RANS and unsteady RANS (URANS) modelling.
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A CFD-based Scaling Approach for Ducted Propellers
TL;DR: In this article, a scaling approach based on systematic CFD calculations performed at different Reynolds numbers is proposed for practical use, where scale effects predicted on the pressure and friction components of propeller thrust and torque coefficients and duct thrust coefficients are compounded into a component-based scaling procedure using individual scaling functions.
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Instantaneous and time-averaged flow fields of multiple vortices in the tip region of a ducted propulsor
Ghanem F. Oweis,Steven L. Ceccio +1 more
TL;DR: In this article, the instantaneous and time-averaged flow fields in the tip region of a ducted marine propulsor are examined, where a primary tip-leakage vortex interacts with a secondary, co-rotating trailing edge vortex and other co-and counterrotating vorticity found in the blade wake.