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Jinwu Wang, Zhe Liu, Mao Yang, Wenqi Zhou, Han Tang, Long Qi, Qi Wang and Yi-Jia Wang
Weeds compete with rice for sunlight and nutrients and are prone to harboring pathogens, leading to reduced rice yields. Addressing the issues of low weeding efficiency and weed mortality rates in existing inter-row weeding devices, the study proposes th...
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Jin Zhang, Min Xia, Wei Chen, Dong Yuan, Chongyou Wu and Jiping Zhu
The desirable sowing period for winter wheat is very short in the rice-wheat rotation areas. There are also lots of straw left in harvested land. Deep rotary tillage can cover rice straw under the surface to increase soil organic matter. Clarifying the e...
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Ali Khosravani, Jacky M. A. Desbiolles, John M. Fielke, Mustafa Ucgul and Chris Saunders
There is a rising interest amongst Australian farmers to use disc seeders due to their ability to operate in high residue conditions and at higher speeds, commonly in the range of 12 to 15 km h-1. This paper reports on developing an analytical and discre...
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Han Lin, Jin He, Hui Li, Hongwen Li, Qingjie Wang, Caiyun Lu, Yanjie Li and Shaomei Jiang
Soil organic cover technology is an effective way to solve agricultural productivity and agro-environmental issues. However, some factors limit the widespread adoption of its application, including unclear soil organic cover effects and the lack of high-...
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Abdallah Samad, Gitsuzo B. S. Tagawa, François Morency and Christophe Volat
Calculating the unsteady convective heat transfer on helicopter blades is the first step in the prediction of ice accretion and the design of ice-protection systems. Simulations using Computational Fluid Dynamics (CFD) successfully model the complex aero...
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Phillip Burgers
The capability of flapping wings to generate lift is currently evaluated by using the lift coefficient ??????????
C
¯
L
, a dimensionless number that is derived from the basal equation that calculates the steady-state lift coefficient CL for fixed wings....
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Min-Soo Jeong, In Lee, Seung-Jae Yoo and Kwang-Choon Park
Aeroelastic instability problems have become an increasingly important issue due to the increased use of larger horizontal axis wind turbines. To maintain these large structures in a stable manner, the blade design process should include studies on the d...
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Xin Cai, Jie Zhu, Pan Pan and Rongrong Gu
This paper presents an optimization method for the structural design of horizontal-axis wind turbine (HAWT) blades based on the particle swarm optimization algorithm (PSO) combined with the finite element method (FEM). The main goal is to create an optim...
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Jiahao Guo and Zhou Zhou
In order to improve the design accuracy of the blade design method of a ducted fan based on the blade element momentum theory, the design was modified by the CFD calculation with higher accuracy to propose an integrated and efficient design method for th...
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Anton Hadar, Andrei-Daniel Voicu, Florin Baciu, Daniel Vlasceanu, Daniela-Ioana Tudose and Stefan-Dan Pastrama
This paper describes the transition towards a composite structure, with the same overall aerodynamic characteristics, for a tail rotor blade of an IAR330 helicopter. The newly proposed structure of the composite blade is made of a carbon-roving spar embe...
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Jixin Man, Beirao Xue, Xiangde Bian, Wengao Yan, Da Qiao and Wu Zeng
Friction dampers are widely employed to reduce blade resonance vibration amplitude in turbomachinery. In this paper, a study was performed on the forced response of two blades with dual friction dampers. Numerical simulation and experimental testing were...
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Jörg R. Riccius and Evgeny B. Zametaev
A numerical turbine-blade fatigue-life analysis method is suggested. This method comprises a stationary thermal 3D finite element (FE) analysis of the hot run for the combined high-cycle fatigue (HCF) and creep analysis, and a follow-on (one-way coupled)...
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Tao Wang, Zhengdao Liu, Xiaoli Yan, Guopeng Mi, Suyuan Liu, Kezhou Chen, Shilin Zhang, Xun Wang, Shuo Zhang and Xiaopeng Wu
Due to a lack of an accurate model in finite element simulation of mechanized harvesting of wild chrysanthemum, the stem of wild chrysanthemum in the harvesting period is taken as the research object. ANSYS Workbench 19.0 software and LS-DYNA software (L...
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Pieter Maljaars, Laurette Bronswijk, Jaap Windt, Nicola Grasso and Mirek Kaminski
In the past several decades, many papers have been published on fluid?structure coupled calculations to analyse the hydro-elastic response of flexible (composite) propellers. The flow is usually modelled either by the Navier?Stokes equations or as a pote...
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Pieter Maljaars, Laurette Bronswijk, Jaap Windt, Nicola Grasso and Mirek Kaminski
In the past several decades, many papers have been published on fluid–structure coupled calculations to analyse the hydro-elastic response of flexible (composite) propellers. The flow is usually modelled either by the Navier–Stokes equations ...
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Bin Wu, Jiewei Lin, Anshun Xie, Ning Wang, Guichang Zhang, Junhong Zhang and Huwei Dai
Bird strikes are a common, serious, and devastating event in aviation accidents, and multi-bird strikes are also frequently reported. A numerical multi-bird-strike simulation was performed to investigate the effect of flocking birds striking on engine bl...
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Yangwei Wang, Jiahuan Lin, Huawei Duan and Jun Zhang
In the natural marine environment, offshore floating wind turbines (OFWTs) inevitably experience yawed inflow conditions, which will make their aerodynamics more complicated than those experiencing uniform inflow conditions and difficult to understand. I...
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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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Rodolfo Bontempo and Marcello Manna
This paper investigates the impact of the standard approximations embodied in the well-known Momentum Theory on its performance prediction capabilities. To this aim, the results of the momentum theory, which is still widely used in all Blade Element/Mome...
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Peng Xue, Qing Li and Guodong Fu
Aiming at the current complex problem of the mechanized high-quality picking of tender tea buds, this paper designs a tender tea bud-picking manipulator. In the picking process, the quality of the petiole and leaf blade of the tender tea bud is crucial, ...
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