Effects of transition turbulence modeling on the hydrodynamic performance prediction of a rim-driven thruster under different duct designs

Liu, Bao; Vanierschot, Maarten; Buysschaert, Frank

doi:10.1016/j.oceaneng.2022.111142

Cited by 16 publications

(9 citation statements)

References 24 publications

(27 reference statements)

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“…The MRF method is a steady-state approximation for the analysis of situations involving domains that are rotating relatively to each other. Previous work showed that it gave similar results compared to the sliding-mesh method, which is computationally much more expensive [17]. The governing equations for the flow in the selected rotating zone are solved in a relative rotating frame.…”

Section: γ − Re θ Transition Modelmentioning

confidence: 93%

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Comparison Study of the k − kL − ω and γ − Reθ Transition Model in the Open-Water Performance Prediction of a Rim-Driven Thruster

Liu,

Vanierschot,

Buysschaert

2024

IJTPP

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The present work examines the capabilities of two transition models implemented in ANSYS Fluent in the open-water performance prediction of a rim-driven thruster (RDT). The adopted models are the three-equation k−kL−ω and the four-equation γ−Reθ models. Both of them are firstly tested on a ducted propeller. The numerical results are compared with available experimental data, and a good correlation is found for both models. The simulations employing two transition models are then carried out on a four-bladed rim-driven thruster model and the results are compared with the SST k−ω turbulence model. It is observed that the streamline patterns on the blade surface are significantly different between the transition and fully turbulent models. The transition models can reveal the laminar region on the blade while the fully turbulent model assumes the boundary layer is entirely turbulent, resulting in a considerable difference in torque prediction. It is noted that unlike the fully turbulent model, the transition models are quite sensitive to the free-stream turbulence quantities such as turbulent intensity and turbulent viscosity ratio, as these quantities determine the onset of the transition process. The open-water performance of the studied RDT and resolved flow field are also presented and discussed.

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Section: γ − Re θ Transition Modelmentioning

confidence: 93%

“…Liu and Vanierschot [7] and Liu et al [13] compared the hydrodynamic performance of an RDT and a ducted propeller with the same configuration at a model scale and investigated the transitional flow on the propeller blades. The influence of the gap flow on the propeller performance was investigated by Cao et al [14].…”

Section: Introductionmentioning

confidence: 99%

Comparison Study of the k − kL − ω and γ − Reθ Transition Model in the Open-Water Performance Prediction of a Rim-Driven Thruster

Liu,

Vanierschot,

Buysschaert

2024

IJTPP

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“…The results also showed that the duct design has an impact on the hydrodynamic performance of the thruster, with the presence of a stator blade enhancing the performance at low advance coefficients. Overall, the article highlights the importance of considering transition turbulence modeling in predicting the hydrodynamic performance of rim-driven thrusters, which can aid in their design and optimization for various applications [100]. Liu et al delve into the prediction of hydrodynamic performance for a rim-driven thruster, considering different duct designs (as depicted in Figure 9) and incorporating modeling for transition turbulence.…”

Section: Fea and Cfdmentioning

confidence: 99%

Advancements and Applications of Rim-Driven Fans in Aerial Vehicles: A Comprehensive Review

Kasaei,

Yang,

Wang

et al. 2023

Applied Sciences

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As the aviation industry seeks sustainable propulsion solutions, innovative technologies have emerged, among which rim-driven fan (RDF) systems hold notable promise. This comprehensive review paper deeply investigates RDF technology, uncovering its principles, benefits, and transformative potential for aviation propulsion. Amid escalating concerns about greenhouse gas emissions, the aviation sector’s shift towards electric propulsion has gained impetus. RDF technology has emerged as a beacon of optimism, heralding the prospect of energy-efficient and eco-conscious air travel. Navigating the slower development pace of RDF technology for aerospace applications, this paper draws insights from analogous marine technologies and relevant literature. Merging these realms, this paper meticulously examines RDF systems, spotlighting their unique attributes, with particular emphasis on the rim-driven configuration and its fundamental design principles. This review delves into the progressive strides accomplished in RDF’s evolution, encompassing the spectrum from evolving electric motor variants to intricate design considerations, strategic noise and vibration management, innovative control methodologies, advancements in bearing technology, and the strategic integration of finite element analysis (FEA) and computational fluid dynamics (CFD) for comprehensive performance optimization. In the context of aviation’s electrification journey, the exploration of RDF technology marks a pivotal inflection point. This paper concludes by succinctly encapsulating pivotal insights, accentuating RDF technology’s central role in reshaping aviation’s propulsion paradigm. As the aviation sector charts a course towards sustainable progress, the lessons gleaned from RDF technology are poised to chart the trajectory of aviation’s environmental transformation.

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“…1,2 Many studies have been carried out on the motor of RDT, including its bearing design, 3 numerical simulation and practical verification. [4][5][6] Compared with the initial design, the average electromagnetic torque of the optimized model was improved by 16.591% and the fluctuation ratio was reduced to 3.18%, 7 which became the premise of RDT development. 8,9 Ojaghlu and Vahedi 10 presented a method to determine electric motor specifications according to hull and propeller.…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al 16 studied three different forms of catheters for RDTs, two modified 19A and 37 ducts, and one symmetric duct design often seen in RDT designs. The results demonstrate that the γ− Re θ transition model can better capture the transitional flow on the blade’s surface, and substantial discrepancies are observed between both turbulence models with regard to the streamline patterns near the blades on the one hand and skin friction profiles on the other.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the effect of the blade number on the hydrodynamic performance of shaftless rim-driven thruster

Jiang

Shen

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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In this work, numerical investigations were performed to the study the effect of blade number on the hydrodynamic performance of shaftless Rim-driven Thruster (RDT) with certain blade area ratio and pitch ratio. The work investigated and compared the thrust coefficient, torque coefficient and efficiency of the RDTs with different blade numbers. Additionally, this work detected and analyzed the pressure distribution on the blade surface and velocity distribution around the blade and in the wake. The results demonstrate that for a certain advance coefficient, the thrust coefficient and torque coefficient of the RDT increase with the blade number, however the efficiency of the RDT decreases with the increase of blade number. For the same cross-section and advance coefficient, the 7-blade RDT has higher thrust and torque than the 3-blade RDT due to the large friction and pressure difference between the suction and pressure surfaces. The high velocity of both RDTs appears at the junction between each blade and the duct, and the 7-blade RDT has higher velocity in the wake and in the cross-section than the 3-blade RDT. The 3-blade RDT has the high pressure at the leading edge on the suction surface of each blade. However, the 7-blade RDT has not only the high pressure at the leading edge, but also the high negative pressure at the blade root on the suction surface of each blade, so 7-blade RDT has higher torque that 3-blade RDT.

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Effects of transition turbulence modeling on the hydrodynamic performance prediction of a rim-driven thruster under different duct designs

Cited by 16 publications

References 24 publications

Comparison Study of the k − kL − ω and γ − Reθ Transition Model in the Open-Water Performance Prediction of a Rim-Driven Thruster

Comparison Study of the k − kL − ω and γ − Reθ Transition Model in the Open-Water Performance Prediction of a Rim-Driven Thruster

Advancements and Applications of Rim-Driven Fans in Aerial Vehicles: A Comprehensive Review

Numerical analysis of the effect of the blade number on the hydrodynamic performance of shaftless rim-driven thruster

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