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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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Experimental research on ductile fracture criterion in metal forming

Song YU, Weiming FENG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 308-311 doi: 10.1007/s11465-011-0233-z

Abstract:

Ductile fracture criterion is key limitation parameter in material forming. Accuracy predicting surface and internal failure in plastic deformation process affects on the technology design of workpiece and die greatly. Tension, compression, torsion and shearing test on 45# steel are utilized for providing the experimental values of the critical values at fracture, and 11 widely used ductile fracture criterion are selected to simulate the physical experiments and their relative accuracy for predicting and quantifying fracture initiation sites are investigated. The comparing results show that metal forming process under high triaxiality can be estimated successively using both Normalized Cockcroft-latham and the Brozzo ductile fracture criteria, but the Ayada and general Rice-Tracey model work very well for the low triaxiality cases.

Keywords： ductile fracture criteria     metal forming process     material experiment     stress triaxiality    

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Research on the equivalent circuit parameter　of single linear induction motor

Xu Wei,Sun Guangsheng

Strategic Study of CAE 2008, Volume 10, Issue 8,   Pages 76-80

Abstract:

The SLIM parameter has clear error to its real value on the base of the RIM parameter measurement method because it has larger air gap and edge effect. This paper proposes a new scheme suited for SLIM parameter detection. It only needs input total power, phase voltage, phase current, frequency, and then computes primary resistance, primary leakage induction, secondary resistance, secondary leakage induction, air induction and iron loss resistance. The performance analysis of SLIM indicates that this method is very effective and valuable.

Keywords： single linear induction motor     open-secondary circuit experiment     blocked-secondary circuit experiment    

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Research on Relationship Between Vibration and Noise of 6203-2RZ Rolling Bearing

Xia Xintao,Wang Zhongyu,Sun Liming,Zhao Lianchun

Strategic Study of CAE 2003, Volume 5, Issue 8,   Pages 64-69

Abstract: The experiment data are comprehensively processed in the light of the theory of mathematical statistics

Keywords： rolling bearing     vibration     noise     relationship     experiment research    

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Experiment study of a quartz tube falling particle receiver

Tianjian WANG, Fengwu BAI, Shunzhou CHU, Xiliang ZHANG, Zhifeng WANG

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 472-479 doi: 10.1007/s11708-017-0502-6

Abstract: This paper presents an experimental evaluation of a specially designed falling particle receiver. A quartz tube was used in the design, with which the particles would not be blown away by wind. Concentrated solar radiation was absorbed and converted into thermal energy by the solid particles flowed inside the quartz tube. Several experiments were conducted to test the dynamic thermal performance of the receiver on solar furnace system. During the experiments, the maximum particle temperature rise is 212°C, with an efficiency of 61.2%, which shows a good thermal performance with a falling distance of 0.2 m in a small scale particle receiver. The average outlet particle temperature is affected by direct normal irradiance (DNI) and other factors such as wind speed. The solid particles obtain a larger viscosity with a higher temperature while smaller solid particles are easier to get stuck in the helix quartz tube. The heat capacity of the silicon carbide gets larger with the rise of particle temperature, because as the temperature of solid particles increases, the temperature rise of the silicon carbide decreases.

Keywords： solar thermal electricity     central receiver     particle receiver     experimental research    

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Shale reservoir network fracturing technology research and experiment

Jia Changgui,Li Shuangming,Wang Haitao, Jiang Tingxue

Strategic Study of CAE 2012, Volume 14, Issue 6,   Pages 106-112

Abstract: practice, in view of Chinese specific characteristics of shale reservoir, it has been doing exploratory researchThe initial shale network fracturing technique is obtained, and it has good effect in field experiment

Keywords： shale     reservoir     network fracturing    

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Development and Experiment Research of the Postprocessor for Parallel Kinematic Machine Tools

Li Tiemin,Ye Peiqing,Wang Jinsong

Strategic Study of CAE 2003, Volume 5, Issue 12,   Pages 80-86

Abstract: Finally, a real machining experiment on the system mentioned above is introduced.

Keywords： parallel kinematic machine tools     postprocessing algorithm     postprocessor    

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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: In this research, a novel soft arm was developed by coupling a rigid origami exoskeleton with soft airbags

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

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Atmospheric heterogeneous reaction of chlorobenzene on mineral -FeO particulates: a chamber experiment

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1734-9

Abstract:

● Photochemical conversion of chlorobenzene (CB) on α-Fe2O3 was evaluated.

Keywords： Photochemical conversion     Chlorobenzene     α-Fe2O3     PCDD/Fs     Mineral particulate    

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Biaxial tensile-compressive experiment of concrete at high temperatures

SONG Yupu, ZHANG Zhong, QING Likun, YU Changjiang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 94-98 doi: 10.1007/s11709-007-0009-z

Abstract: Biaxial tension-compression experiments of concrete of five stress ratios at high temperatures were carried out using the large static-dynamic triaxial test system in the State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology. The stress ratios s1/s3 are 0, 0.1, 0.25, 0.50, and 0.75. The temperatures are 20vH, 200vH, 300vH, 500vH, 600vH. The mechanical behavior of concrete under biaxial tension-compression at high temperatures is analyzed. It is found that both the tensile strength and strain diminished with the increase in temperature under each stress ratio. Based on the test results, the relationship between tensile strengths and stress ratios and temperature is proposed. In addition, the failure criterion of concrete under biaxial stress state of tension-compression at high temperatures is established.

Keywords： increase     Offshore Engineering     temperature     relationship     addition    

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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

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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Centrifuge experiment and numerical analysis of an air-backed plate subjected to underwater shock loading

Zhijie HUANG, Xiaodan REN, Zuyu CHEN, Daosheng LING

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1350-1362 doi: 10.1007/s11709-019-0559-x

Abstract: In this study, systematic centrifuge experiments and numerical studies are conducted to investigate the effect of shock loads due to an underwater explosion on the dynamic responses of an air-backed steel plate. Numerical simulations with three different models of pressure time history generated by underwater explosion were carried out. The first model of pressure time history was measured in test. The second model to predict the time history of shock wave pressure from an underwater explosion was created by Cole in 1948. Coefficients of Cole’s formulas are determined experimentally. The third model was developed by Zamyshlyaev and Yakovlev in 1973. All of them are implemented into the numerical model to calculate the shock responses of the plate. Simulated peak strains obtained from the three models are compared with the experimental results, yielding average relative differences of 21.39%, 45.73%, and 13.92%, respectively. The Russell error technique is used to quantitatively analyze the correlation between the numerical and experimental results. Quantitative analysis shows that the simulated strains for most measurement points on the steel plate are acceptable. By changing the scaled distances, different shock impulses were obtained and exerted on the steel plate. Systematic numerical studies are performed to investigate the effect of the accumulated shock impulse on the peak strains. The numerical and experimental results suggest that the peak strains are strongly dependent on the accumulated shock impulse.

Keywords： underwater explosion     centrifuge experiment     shock load     dynamic response     accumulated shock impulse    

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New stage of the research and application of the technology about engineering blasting energy conservation

Liu Youping,Li Yi,Zhang Pijie,He Guangyi

Strategic Study of CAE 2008, Volume 10, Issue 9,   Pages 39-46

Abstract: The result was analyzed and proved its correct through the stimulant experiment strain tests.

Keywords： engineering water-pressure blasting     energy conservation environmental protection     stimulant experiment    

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Physics model experimental research on the bearing capability of the middle tower caission foundation

Ruan Jing and Hu Feng

Strategic Study of CAE 2012, Volume 14, Issue 5,   Pages 57-61

Abstract:

The foundation of the middle pylon of Taizhou Bridge is located above the overlying deposit with the height of 200 m in the water. The round rectangular caisson foundation with the plane dimension of 58 m×44 m and the height of 76 m is employed. To verify the safety and stability of the middle pylon of Taizhou Bridge, a physics model with the scale of 1∶100 to the real structure is built up. The ultimate bearing capacity of the caisson foundation and the influence of sinking depth, soil moisture content, and the side wall friction on the bearing capacity are obtained.

Keywords： bearing capability of caission foundation     Taizhou Bridge     physics model experiment    

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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

Experimental research on ductile fracture criterion in metal forming

Song YU, Weiming FENG

Journal Article

Research on the equivalent circuit parameter　of single linear induction motor

Xu Wei,Sun Guangsheng

Journal Article

Research on Relationship Between Vibration and Noise of 6203-2RZ Rolling Bearing

Xia Xintao,Wang Zhongyu,Sun Liming,Zhao Lianchun

Journal Article

Experiment study of a quartz tube falling particle receiver

Tianjian WANG, Fengwu BAI, Shunzhou CHU, Xiliang ZHANG, Zhifeng WANG

Journal Article

Shale reservoir network fracturing technology research and experiment

Jia Changgui,Li Shuangming,Wang Haitao, Jiang Tingxue

Journal Article

Development and Experiment Research of the Postprocessor for Parallel Kinematic Machine Tools

Li Tiemin,Ye Peiqing,Wang Jinsong

Journal Article

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

Journal Article

Atmospheric heterogeneous reaction of chlorobenzene on mineral -FeO particulates: a chamber experiment

Journal Article

Biaxial tensile-compressive experiment of concrete at high temperatures

SONG Yupu, ZHANG Zhong, QING Likun, YU Changjiang

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

He Guangyi,Duan Changyan,Jing Shan,Wang Taichao

Journal Article

Centrifuge experiment and numerical analysis of an air-backed plate subjected to underwater shock loading

Zhijie HUANG, Xiaodan REN, Zuyu CHEN, Daosheng LING

Journal Article

New stage of the research and application of the technology about engineering blasting energy conservation

Liu Youping,Li Yi,Zhang Pijie,He Guangyi

Journal Article

Physics model experimental research on the bearing capability of the middle tower caission foundation

Ruan Jing and Hu Feng

Journal Article