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Numerical simulation and experiment research of radiation performance in a dish solar collector system

Yong SHUAI, Xinlin XIA, Heping TAN

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 488-495 doi: 10.1007/s11708-010-0007-z

Abstract: The Monte Carlo ray-tracing method is applied and coupled with optical properties to predict the radiation performance of solar concentrator/cavity receiver systems. Several different cavity geometries are compared on the radiation performance. A flux density distribution measurement system for dish parabolic concentrators is developed. The contours of the flux distribution for target placements at different distances from the dish vertex of a solar concentrator are taken by using an indirect method with a Lambert and a charge coupled device (CCD) camera. Further, the measured flux distributions are compared with a Monte Carlo-predicted distribution. The results can be a valuable reference for the design and assemblage of the solar collector system.

Keywords： Monte Carlo method     solar energy     radiation performance     cavity receiver    

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Simulation experiment of pumped sand on immersed tunnel

Zheng Aiyuan,Tan Zhongsheng,Li Zhiguo

Strategic Study of CAE 2009, Volume 11, Issue 7,   Pages 81-85

Abstract:

Based on the similarity theory and simulation experiment, main constructionThe following items related with the simulation experiment are introduced, which include the model design, experiment process, important points for attention and the technical requirements.A large of the immediate data is obtained by the experiment.The achievement of the experiment can be used to provide reference for the future engineering construction

Keywords： immersed tunnel     foundation pumped sand     simulation experiment    

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Analysis and experiment of controllability of magnetorheological fluids based on micro-pipeline

Yongqing SU, Yikuan SONG, Jiguang YUE

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 339-344 doi: 10.1007/s11465-009-0048-3

Abstract: The controllability of the magneto-rheological fluid (MRF) flowing through a micro-pipeline is analyzed. The coupled formulas for MRF are deduced by analyzing the property of the flow field and magnetic field. Then, the relationship between the flow speed of MRF and the special shear stress under the effect of the magnetic field is founded. The model of the MRF and micro-pipeline is established by using multi-physics software of Comsol, the curve of - in an ideal condition is attained by modifying parameters, and by adding the boundary condition of the model. This paper provides a theoretical proof of the controllability of MRF flowing through the micro-pipeline and explores MRF’s application on the micro-drive and control field.

Keywords： Magneto-rheological fluids (MRF)     micro-pipeline     coupled model     multi-physics simulation    

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Simulation and experimental improvement on a small-scale Stirling thermo-acoustic engine

Mao CHEN,Yonglin JU

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 37-45 doi: 10.1007/s11708-015-0390-6

Abstract: Based on the numerical simulation, a small-scale Stirling thermo-acoustic engine were constructed and

Keywords： thermo-acoustic Stirling engine     small-scale     simulation     experiment    

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Simulation of flow excursion and thermal siphon under natural circulation condition with lower pressure

WANG Jianjun, YANG Xingtuan, JIANG Shengyao

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 169-173 doi: 10.1007/s11708-008-0044-z

Abstract: The simulation of flow excursion was conducted under HRTL-5 condition.The mechanism analysis and the simulation of thermal siphon process were also performed.computer code can be used to simulate the static instability of a natural circulation system and the simulationof flow excursion almost conforms to the experiment result.

Keywords： HRTL-5     experiment     circulation     simulation     thermal    

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materials for controlling phosphorus and nitrogen release from contaminated sediment using a static simulationexperiment

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 3, doi: 10.1007/s11783-021-1463-x

Abstract:

• Lanthanum modified bentonite (LMB) can effectively absorb phosphorus (P).

Keywords： Sediment     Eutrophication     Thin-layer capping     Phosphorus     Nitrogen     Aluminum-based P-inactivation agent    

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Experimental study on concrete box culverts in trenches

Baoguo CHEN, Junjie ZHENG, Jie HAN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 73-80 doi: 10.1007/s11709-009-0008-3

Abstract: In this paper, a full-scale experiment and numerical simulation were conducted to evaluate the variation

Keywords： culvert     vertical earth pressure     soil arch     full-scale experiment     numerical simulation    

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A metadata model for collaborative experiments and simulations in earthquake engineering

Jean-Pierre BARDET, Nazila MOKARRAM, Fang LIU

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2,   Pages 133-153 doi: 10.1007/s11709-010-0036-z

Abstract: Research projects in earthquake engineering yield a very large amount of complex data from experiments and computer simulations. Understanding and exchanging these complicated and voluminous data sets prompted the development of metadata models that document the processes of data generation, and facilitate the collaboration and exchange of information between researchers. The present metadata model was designed to document and exchange a large number of large data files in earthquake engineering, but is applicable to other fields of engineering and science. The model was conceived based on a series of former data models, which were unduly complicated and limited to few types of experiments. Simpler than its predecessors, the present metadata model applies to all kinds of earthquake engineering experiments. It was developed in the object-oriented framework using Protégé. Its applications are illustrated with examples from centrifuge experiments.

Keywords： metadata     data     documentation     experiment     simulation    

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Design approach for single piston hydraulic free piston diesel engines

Wei WU, Shihua YUAN, Jibin HU, Chongbo JING,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 371-378 doi: 10.1007/s11465-009-0069-y

Abstract: The operating characteristics of a single piston hydraulic free piston diesel engine differ significantly from conventional diesel engines and this provides a theoretical basis for controlling and optimizing the design of the engine. The design of the proposed engine intended as a power supply for a hydraulic propulsion vehicle is presented. An engine performance forecast model was generated in AMESim. The performance of the prototype engine is predicted and the predictive results are verified with experiments. The particular features of the engine are discussed. The dynamic characteristics of the prototype engine are analyzed and the results indicate the rationality and feasibility of the engine design parameters. The features of the controllable working frequency and the intermittence output flows are provided. The flow capacity characteristics of the hydraulic valves on the prototype engine are offered. The methods for starting and the operation after misfire are presented.

Keywords： free piston engine (FPE)     diesel engine     hydraulic equipment     simulation     experiment    

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Air bearing center cross gap of neutron stress spectrometer sample table support system

Yang LI,Yunxin WU,Hai GONG,Xiaolei FENG

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 403-411 doi: 10.1007/s11465-016-0405-y

Abstract:

A support system is the main load-bearing component of sample table for neutron stress spectrometer, and air bearing is an important element of a support system. The neutron stress spectrometer sample table was introduced, and the scheme for air bearing combination was selected. To study the performance of air bearing center cross gap, finite element models (FEMs) were established based on air motion and Reynolds equations, effects of air supply pressure, and gap parameters on the overturning moment and bearing capacity of air bearing center cross gap were analyzed. Results indicate that the width, depth, and height differences of the marble floor gap played important roles in the performance of the air bearing. When gap width is lesser than 1 mm and gap depth is lower than 0.4 mm, bearing capacity and overturning moment would vary rapidly with the variation of the width and depth. A gap height difference results in the bearing capacity dropping rapidly. The FEM results agree well with experimental results. Further, findings of the study could guide the design of the support system and marble floor.

Keywords： neutron stress spectrometer     sample table     support system     air bearing     center cross gap     simulation     experiment    

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The Research on Measurement of Drift in the Evaluation Conclusion of Single Method

Chen Guohong,Li Meijuan,Chen Yantai

Strategic Study of CAE 2004, Volume 6, Issue 3,   Pages 58-63

Abstract: drifting nature in the evaluation conclusion of single method is investigated in order to offer the experiment

Keywords： comprehensive evaluation methods     computer simulation experiment     measurement of drift    

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Research and Application of Engineering Water-pressure Blasting for Economizing Energy and Environmental Protection

He Guangyi,Duan Changyan,Jing Shan,Wang Taichao

Strategic Study of CAE 2003, Volume 5, Issue 9,   Pages 43-48

Abstract: In this paper, the theoretic analysis and simulation experiment of the technique have been introduced

Keywords： engineering water-pressure blasting     simulation experiment     energy utilization ratio    

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Environmental and Ecological Protection Equipment in Deep Sea

Feng Jingchun, Liang Jianzhen, Zhang Si, Cai Yanpeng, Yang Zhifeng

Strategic Study of CAE 2020, Volume 22, Issue 6,   Pages 56-66 doi: 10.15302/J-SSCAE-2020.06.008

Abstract: ecological protection are introduced from the aspects of in situ detection, sampling, experimental simulationLarge-scale deep sea environment simulation equipment needs to be improved urgently in China.

Keywords： deep sea，environmental andecological protection，in situ experiment，truth-preserving sampling，in situsimulation    

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Design and experiment of a novel pneumatic soft arm based on a deployable origami exoskeleton

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 4, doi: 10.1007/s11465-023-0770-2

Abstract: Soft arms have shown great application potential because of their flexibility and compliance in unstructured environments. However, soft arms made from soft materials exhibit limited cargo-loading capacity, which restricts their ability to manipulate objects. In this research, a novel soft arm was developed by coupling a rigid origami exoskeleton with soft airbags. The joint module of the soft arm was composed of a deployable origami exoskeleton and three soft airbags. The motion and load performance of the soft arm of the eight-joint module was tested. The developed soft arm withstood at least 5 kg of load during extension, contraction, and bending motions; exhibited bistable characteristics in both fully contracted and fully extended states; and achieved a bending angle of more than 240° and a contraction ratio of more than 300%. In addition, the high extension, contraction, bending, and torsional stiffnesses of the soft arm were experimentally demonstrated. A kinematic-based trajectory planning of the soft arm was performed to evaluate its error in repetitive motion. This work will provide new design ideas and methods for flexible manipulation applications of soft arms.

Keywords： pneumatic soft arm     soft airbag     deployable origami exoskeleton     bistable characteristics     cargo-loading capacity    

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Title Author Date Type Operation

Numerical simulation and experiment research of radiation performance in a dish solar collector system

Yong SHUAI, Xinlin XIA, Heping TAN

Journal Article

Simulation experiment of pumped sand on immersed tunnel

Zheng Aiyuan,Tan Zhongsheng,Li Zhiguo

Journal Article

Analysis and experiment of controllability of magnetorheological fluids based on micro-pipeline

Yongqing SU, Yikuan SONG, Jiguang YUE

Journal Article

Simulation and experimental improvement on a small-scale Stirling thermo-acoustic engine

Mao CHEN,Yonglin JU

Journal Article

Simulation of flow excursion and thermal siphon under natural circulation condition with lower pressure

WANG Jianjun, YANG Xingtuan, JIANG Shengyao

Journal Article

materials for controlling phosphorus and nitrogen release from contaminated sediment using a static simulationexperiment

Journal Article

The application of VR and AR to simulation experiment

28 Nov 2020

Conference Videos

Experimental study on concrete box culverts in trenches

Baoguo CHEN, Junjie ZHENG, Jie HAN

Journal Article

A metadata model for collaborative experiments and simulations in earthquake engineering

Jean-Pierre BARDET, Nazila MOKARRAM, Fang LIU

Journal Article

Design approach for single piston hydraulic free piston diesel engines

Wei WU, Shihua YUAN, Jibin HU, Chongbo JING,

Journal Article

Air bearing center cross gap of neutron stress spectrometer sample table support system

Yang LI,Yunxin WU,Hai GONG,Xiaolei FENG

Journal Article

The Research on Measurement of Drift in the Evaluation Conclusion of Single Method

Chen Guohong,Li Meijuan,Chen Yantai

Journal Article

Research and Application of Engineering Water-pressure Blasting for Economizing Energy and Environmental Protection

He Guangyi,Duan Changyan,Jing Shan,Wang Taichao

Journal Article

Environmental and Ecological Protection Equipment in Deep Sea

Feng Jingchun, Liang Jianzhen, Zhang Si, Cai Yanpeng, Yang Zhifeng

Journal Article

Design and experiment of a novel pneumatic soft arm based on a deployable origami exoskeleton

Journal Article