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Chunyun Shen, Jiahao Zhang, Chenglin Ding and Shiming Wang
By combining computational fluid dynamics (CFD) and surrogate model method (SMM), the relationship between turbine performance and airfoil shape and flow characteristics at low flow rate is revealed. In this paper, the flow velocity tidal energy airfoil ...
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Tingbo Zhou, Zhengke Zhang, Yongqiang Tian, Zhongxiang Xi, Xiaomu Dou, Weidong Liu, Guobiao Zhang and Chao Gao
Aimed at addressing the difficult problems existing in extremely low speed calibration facilities for hot-wire anemometers, where calibration accuracy is often insufficient and vulnerable to the contamination from temperature and humidity discrepancies b...
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Qikai Zhuang, Peijie Yue, Kai Li, Xin Guo and Xiaoquan Cheng
Coal-based carbon foam (CCF) has been widely used in the hypersonic vehicles? thermal protection system (TPS) due to its good thermal insulation and mechanical properties. In addition, CCF can absorb large quantities of energy when crushed so that the CC...
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Shahab Khakpour, Petri Tanska, Amir Esrafilian, Mika E. Mononen, Simo Saarakkala, Rami K. Korhonen and Timo Jämsä
The results of this study can be used in designing prevention strategies for low-energy acetabular fractures. Also, it could help to cut the huge associated costs imposed on the health sector annually for managing acetabular fractures among the elderly p...
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Hang Zhao, Jia Zhang, Honghan Chen, Liyang Wang and Zhuze Yang
The localization of groundwater contaminant sources is the first and most fundamental step when dealing with site contamination problems. This paper presents a novel approach for groundwater pollution source identification in a site with low-velocity gro...
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Longxiang Huang and Feng Lyu
A compact low-velocity ocean current energy harvester (LOCH) is developed to power undersea instrument platforms for long-term scientific seafloor observation. Noncontact magnetic couplings are used in the LOCH to eliminate friction and achieve reliable ...
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Job Immanuel Encarnacion, Cameron Johnstone and Stephanie Ordonez-Sanchez
Existing installations of tidal-stream turbines are undertaken in energetic sites with flow speeds greater than 2 m/s. Sites with lower velocities will produce far less power and may not be as economically viable when using ?conventional? tidal turbine d...
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Mariana Ribas-Ribas, Gianna Battaglia, Matthew P. Humphreys and Oliver Wurl
Carbon dioxide (CO2) fluxes between the ocean and atmosphere (FCO2) are commonly computed from differences between their partial pressures of CO2 (?pCO2) and the gas transfer velocity (k). Commonly used wind-based parameterizations for k imply a zero int...
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Djilali Beida Maamar, Ramdane Zenasni
Pág. 218 - 225
This work deals with the application of the genetic algorithm to the determination of optimal safety factor of layered structure subjected to low velocity impact damage. These genetic algorithms are optimization algorithms based on the techniques derived...
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Hongjian Zhang, Mingming Wang, Weidong Wen, Ying Xu, Haitao Cui and Jinbo Chen
The failure and residual strength after low-velocity impact of stitched composites are very important in their service and maintenance phases. In order to capture the failure and residual strength more accurately, a full-process numerical analyzing metho...
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Djilali Beida Maamar, Ramdane Zenasni
Pág. 140 - 145
The main purpose of the present investigation was to determine the damages generated by the low velocity impact by mean of the finite element method. The commercial transient finite element package LS-dyna used to model the effect of slug impactor induce...
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Djilali Beida Maamar, Zenasni Ramdane
Pág. 142 - 151
The main purpose of the present investigation was to determine the damages generated by the low velocities with the help of the experimental method (Impact by a drop test) and the finite element method. The commercial transient finite element package LS-...
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Muhammad Yousaf and Chuwei Zhou
Indentation is an effective indication of LVI damage in PMCs. However, indentation can rebound partly with time. Thus, a good understanding of the rebound behavior of the impacted pit is helpful in damage assessment for composites. In this paper, a trans...
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Kseniya Chetverikova, Jørgen Arendt Jensen, Marie Sand Traberg and Matthias Bo Stuart
A method for volumetric Tensor Velocity Imaging employing row-column (RC) addressed array with low computational complexity is investigated in simulations. An interleaved and non-interleaved sliding aperture sequence with 11 rows and 11 columns emissions...
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Jun-Hua Chen, Xian-Cheng Wang, Hao Li, Chu-Hua Jiang and Ling-Jie Bao
The blade is the key component for energy capture in horizontal axis tidal current turbine, and the blade?s design is directly related to the efficiency of the power generation device. The seawater flow velocity is a crucial parameter for blade design. S...
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Amine Smahat, Abdelkader Megueni
Pág. 113 - 120
This paper analyzes the behavior of a functionnally graded plate subjected to impact force at a low velocity by adopting the Hertz law. The differential equation which governs the impact phenomenon is used to calculate the contact force, indentation and ...
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Martin Ottersten, Hua-Dong Yao and Lars Davidson
In this study, unsteady low-frequency characteristics in a voluteless low-speed centrifugal fan operating at a high mass flow rate are studied with improved delayed detached eddy simulation (IDDES). This study is motivated by a recent finding that the no...
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Andrea Sellitto, Salvatore Saputo, Francesco Di Caprio, Aniello Riccio, Angela Russo and Valerio Acanfora
Numerical investigation on the damage behavior of CFRP laminates subjected to low velocity impacts.
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Muhammad Yousaf, Chuwei Zhou, Yu Yang and Li Wang
Impact indentation is believed to be an effective indication of low-velocity impact (LVI) damage for polymer matrix composites. However, it has been discovered that an indentation can partially rebound over time. Impact indentation and its rebound behavi...
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Weixiang Yao, Yubin Lan, W. Clint Hoffmann, Jiyu Li, Shuang Guo, Huihui Zhang and Juan Wang
To investigate the spray atomization characteristics of aerial nozzles adapted to manned agricultural helicopters under medium-low airflow velocity (0 to 27.8 m/s) conditions, the droplet size test was carried out in both wind tunnel and field tests. In ...
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