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Yong Liang Ma

Bio: Yong Liang Ma is an academic researcher from Harbin Engineering University. The author has contributed to research in topics: Turbine & Normal distribution. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper , the authors used the Taguchi method to optimize the typical parameters of the vertical axis turbine, i.e., airfoil (NACA), pitch angle (β), enwinding ratio (ϖ), solidity ratio (σ), and small shaft position (O).

6 citations

Journal ArticleDOI
TL;DR: In this article, the adaptive kernel method is employed to establish the probabilistic random stress model and the probability-based cyclic stress-strain curve considering entire material constants as random variable is proposed.
Abstract: A fatigue reliability method has been developed for strain-based fatigue under random loading. The adaptive kernel method is employed to establish the probabilistic random stress model. The probability-based cyclic stress-strain curve considering entire material constants as random variable is proposed. The probabilistic model of cyclic strain life relations is established by introducing a standard normal distribution. Based on these probabilistic models, the random characteristic value of fatigue life is obtained by Monte Carlo method. According to the mean value first order second moment reliability method, the probability of failure can be given out. The example of application is demonstrated.

1 citations

Journal ArticleDOI
TL;DR: In this paper , a fully coupled aero-hydro-servo-elastic method is presented to simulate floating offshore wind turbines (FOWTs) based on Modelica language and AeroDyn co-simulations.

Cited by
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BookDOI
28 Apr 2017
TL;DR: In this paper, a series of static and dynamic characterization tests on the as built catamaran model was conducted to provide a reliable and well identified physical model before the towingtank tests were carried out for giving key insights into the wetdeck load and responses as well as an FSI validation dataset for numerical solvers.
Abstract: The investigation of wetdeck slamming phenomenon is a challenging Fluid-Structure Interaction (FSI) problem for both experimental and numerical analysis, requiring detailed design and structural assessment of the physical model. The focus of this paper is to document the design approach and the testing effort devoted to provide a reliable and well identified physical model before the towingtank tests were carried out for giving key insights into the wetdeck load and responses as well as an FSI validation dataset for numerical solvers. Thus, one of the main objectives is reducing the uncertainty linked to the modeling of the multi-hull structure by performing a series of both static and dynamic characterization tests on the as built catamaran model. The insight gained from this test campaign will be used to update the structural models coupled within the FSI solvers to increase the accuracy of the predicted hydrodynamic loading. Among FSI problems still receiving positive attention in ship and offshore engineering, the accurate prediction of complex loading and responses on multi-hull vessels is particularly demanding, since it involves two-way coupling of the deck structure with the flow impinging on it. Currently, there is a gap in available experimental FSI data related to this problem that can be used for numerical solver validation. Current FSI data sets are severely limited by the uncertainties associated with the experimental setups. Furthermore, though segmented model tests have become more feasible and popular for monohulls, not many experimental campaigns (Hermundstad et al. 1995, Kyyro & Hakala 1997, Cheng, F. 1997) exist for segmented catamarans that provide both global and local loads and hull responses. The only systematic investigation on elastically scaled catamarans was carried out by Lavroff et al. (2007, 2013). Dessi et al. (2016) have already illustrated the preliminary experimental results on an elastically scaled model of a SWATH aimed to accurately depict the wave loading and structural response from seakeeping tests. In the present paper the focus is instead on the structural tests performed for the physical model qualification with an extended account of the dry and wet vibration mode identification of the entire catamaran.

43 citations

Journal ArticleDOI
02 Aug 2022-Energies
TL;DR: In this article , a drag-lift hybrid type wind turbine structure based on an NACA0018 symmetrical airfoil was proposed, which can adaptively change the blade shape under static and low speed conditions.
Abstract: In recent years, with the continuous development of new energy, how to efficiently use wind energy has received more and more market attention. Due to cost advantages, the development of small wind turbines is accelerating. Among them, the design and research of the airfoil design and research of the lift vertical axis wind turbine has matured, but because of the aerodynamic characteristics of the lift airfoil structure, it is impossible to start itself at low wind speed, resulting in the waste of low wind speed energy. Although the drag wind turbine has good self-starting performance, the wind energy utilization efficiency in the high-speed state is inefficient. Each has its own unique shortcomings, which directly affects the marketization of small wind turbines. In order to solve these problems, this paper presents a drag-lift hybrid type wind turbine structure based on an NACA0018 symmetrical airfoil, which can adaptively change the blade shape. This design can keep the blade in the drag shape under static and low speed conditions, and adaptively change the lift shape with the increase of speed. In addition, through the research method of CFD numerical simulation combined with physical experiments, the proposed wind turbine design is studied and analyzed from multiple angles. At the same time, the “6DOF + dynamic grid” setting is used to study the influence of the opening angle factor of the drag-lift hybrid blade on the self-starting performance, and the study shows that the design of the drag-lift hybrid blade proposed in this paper has a higher self-starting torque and lower starting wind speed than the traditional lifting blade, and it is observed that the drag-lift hybrid blade has the best self-starting performance when the opening angle of the blade is 80°. At the same time, the problem of switching the blade morphology of the drag-lift hybrid blade is also analyzed, along with how to use the spring to control all this adaptively. In order to better analyze the advantages of the drag-lift hybrid design proposed in this paper, a wind tunnel test was also carried out using the physical model, and the relationship between the leaf tip speed ratio and the wind energy utilization rate was obtained, which intuitively showed the improvement of the wind energy utilization rate of the drag-lift hybrid design compared with the traditional lift blade.

2 citations

Journal ArticleDOI
TL;DR: Agarwal et al. as mentioned in this paper presented a design and analysis of garlov helical hydro turbine on index of revolution for a micro-hydropower system, where nine 3D-GHT's with a diameter and height of 0.600 m were modelled based on varying indices of revolution.

2 citations

Journal ArticleDOI
TL;DR: In this paper , two surrogate models, i.e., Kriging and artificial neural networks (ANN), were adopted for the performance prediction of a twin-VAWT with a close staggered arrangement.

2 citations

Journal ArticleDOI
TL;DR: In this article , the performance comparison of straight and helical-bladed lift-based VAHTs and the influence of design and operating conditional parameters was made and the potential research areas that need to be addressed in future studies were also found and presented.

2 citations