Vibrations of simplified rudder induced by propeller wake

Zhang, Weipeng; Ning, Xiaoshen; Li, Fugeng; Guo, Hang; Sun, Shuzheng

doi:10.1063/5.0058968

Cited by 24 publications

(3 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This visualization reveals the evolution of the propeller wake vortex structures from their genesis in the near field to their dispersion in the far field. The wake vortex system is primarily composed of four robust tip vortices along with a central hub vortex [57][58][59][60][61][62]. In the near field, the tip vortex exhibits a well-ordered topological structure marked by strong coherence.…”

Section: Results and Analysismentioning

confidence: 99%

Influence of Load Conditions on the Propeller Wake Evolution

Yu,

Wang,

Liu

et al. 2023

JMSE

View full text Add to dashboard Cite

The present work presents numerical research on the wake flows behind a propeller operating under three advance coefficients. Large eddy simulations are adopted to obtain the viscous flow information behind the propeller. In particular, the study highlights the comparison of the evolution characteristics and the flow physics within the propeller wakes with three advance coefficients. The predicted global force and moment coefficients and phase-average statistics of streamwise velocity agree well with the available experimental data. Compared to all other flow structures in the wake, the tip vortices are found to play the most significant role according to the results. During the pairing process of adjacent tip vortices, the tip vortices diffuse circumferentially, leading to enhanced mutual-induction effects. When the advance coefficient is low, the wake becomes distorted, and the pairing process takes place in the middle region of the flow field. As a result of their unstable motion, the four tip vortices generated by the propeller cannot be distinguished individually in the far field. Instead, they break down into smaller vortices and tend to distribute themselves uniformly in the azimuthal direction. The increase in the advance coefficient delays the pairing process. This study offers valuable insights for the design and optimization of marine propellers.

show abstract

Section: Results and Analysismentioning

confidence: 99%

Influence of Load Conditions on the Propeller Wake Evolution

Yu,

Wang,

Liu

et al. 2023

JMSE

View full text Add to dashboard Cite

show abstract

“…2021; Zhang et al. 2021) and its variants, including detached DES (DDES) (Zhang & Jaiman 2019; Shi et al. 2022) and improved DDES (IDDES) (Qin et al.…”

Section: Introductionmentioning

confidence: 99%

Effects of a nozzle on the propeller wake in an oblique flow using modal analysis

et al. 2023

View full text Add to dashboard Cite

The effect of a nozzle on the wake dynamics of a four-bladed propeller operating in an oblique flow is investigated via modal decomposition and flow visualization of the results obtained from numerical simulations using delayed detached eddy simulations. The wake characteristics and destabilization mechanisms of a non-ducted propeller (NP) and ducted propeller (DP) in axisymmetric and oblique flow conditions are systematically analysed. The wake characteristics on the windward side are very different from those on the leeward side in an oblique flow, and the nozzle has a crucial role in mitigating the asymmetry and weakening the wake deflection. More destabilization mechanisms are present in an oblique flow than in an axisymmetric flow, including the asymmetric evolution and destabilization of the helixes on the windward and leeward sides of the NP wake, the interaction between the vortex shedding and the helixes in the DP leeward region, and the generation of a tube-shaped wake envelope around the nozzle and its rolling-up. Moreover, the effect of the nozzle on wake meandering is discussed based on modal analysis.

show abstract

“…17 In addition, some of the research works are carried out to study the wake instability of a propeller, 18,19 a submarine, 20 and the wake-structure interaction between the propeller and rudder. [21][22][23] To the authors' best knowledge, the study of PJP with a different number of blades has not been carried out.…”

Section: Introductionmentioning

confidence: 99%

Effect of the odd and even number of blades on the hydrodynamic performance of a pre-swirl pumpjet propulsor

et al. 2022

View full text Add to dashboard Cite

A numerical study based on detached eddy simulations is conducted to investigate the effects of the odd and even number of rotor/stator blades, that is, nr/ ns, on the hydrodynamic performance of a pre-swirl pumpjet propulsor (PJP). In this paper, six PJPs, the PJP 6-4 ( ns– nr), 8-6, 10-8, 7-5, 9-7, and 11-9, are created. The hydrodynamic performance, the unsteady force of blades, and the wake structure of the PJPs are compared. The results show that the frequency of the fluctuating force of the whole rotor highly depends on the number or, more specifically, the parity of nr. When the parameter nr is the even number, it can be found that the total unsteady force of the rotor blades will be strengthened at the k-order stator-blades-passing frequency ([Formula: see text]). Moreover, it indicates that the superposition-enhancement coefficient (is defined as [Formula: see text]) at [Formula: see text] equals to nr, at least from the present tests. In terms of both the rotor and stator numbers are even, a phenomenon of the rotor–stator resonance occurs at [Formula: see text], where fn represents the hub rotational frequency. This work is expected to give some insight in the design of a PJP.

show abstract

Vibrations of simplified rudder induced by propeller wake

Cited by 24 publications

References 44 publications

Influence of Load Conditions on the Propeller Wake Evolution

Influence of Load Conditions on the Propeller Wake Evolution

Effects of a nozzle on the propeller wake in an oblique flow using modal analysis

Effect of the odd and even number of blades on the hydrodynamic performance of a pre-swirl pumpjet propulsor

Contact Info

Product

Resources

About