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Effects of critical geometric parameters on the optical performance of a conical cavity receiver

Hu XIAO, Yanping ZHANG, Cong YOU, Chongzhe ZOU, Quentin FALCOZ

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 673-683 doi: 10.1007/s11708-019-0630-2

Abstract: , the commercial software TracePro was used to investigate the effects of some factors on a conical cavityaffect the optical efficiency, the maximum heat flux density, and the light distribution in the conical cavityTo make a reliable simulation, the helical tube was attached to the inner wall of the cavity in the proposedThe conical cavity receiver had an optimal optical performance when the focal point of the collector

Keywords： parabolic collector     conical cavity receiver     critical geometric parameters     optical performance    

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Effect of cavity defect on the triaxial mechanical properties of high-performance concrete

Yanbin ZHANG; Zhe WANG; Mingyu FENG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 5,   Pages 600-614 doi: 10.1007/s11709-022-0821-5

Abstract: The stress concentration of pipe structure or cavity defect has a great effect on the mechanical propertiesIn this experiment, the pressurized liquid can only contact the surface of the sample in the cavity,intact samples without a cavity.always secondary tensile fractures initiating from the cavity sidewall.in which the cavity size is added as an impact factor to predict the strength of the sample.

Keywords： high-performance concrete     cavity     conventional triaxial compression     pressurized liquid     modified power-law    

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Numerical simulation of the heat flux distribution in a solar cavity receiver

Yueshe WANG, Xunwei DONG, Jinjia WEI, Hui JIN

Frontiers in Energy 2011, Volume 5, Issue 1,   Pages 98-103 doi: 10.1007/s11708-010-0019-8

Abstract: In the design of the receiver, the heat flux distribution in the cavity should be considered first.numerical simulation using the Monte Carlo Method has been conducted on the heat flux distribution in the cavityBy tracing every solar ray, the distribution of heat flux density in the cavity receiver was obtainedThese results provide necessary data for the structure design of cavity receiver and the local thermal

Keywords： solar cavity receiver     Monte Carlo method     heat flux distribution    

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―Summary of investigations on rotating cavity at IDG, RWTH Aachen University

Dieter BOHN, Jing REN,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 489-497 doi: 10.1007/s11708-009-0040-y

Abstract: of Steam and Gas Turbines, RWTH Aachen University, to analyze the flow structure inside the rotating cavitythe experimental and numerical results show that the whole flow structure rotating slower than the cavityIt is suggested that the vortices inside the cavity are created by the gravitational buoyancy force in

Keywords： rotating cavity     buoyancy     unsteady flow    

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Geometric optimization model for the solar cavity receiver with helical pipe at different solar radiation

Chongzhe ZOU, Huayi FENG, Yanping ZHANG, Quentin FALCOZ, Cheng ZHANG, Wei GAO

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 284-295 doi: 10.1007/s11708-019-0613-3

Abstract: geometric parameters, several researches have already optimized the thermal efficiency of the cylindrical cavityThis study constructed a 3-D numerical model of cylindrical cavity receiver with DNI variation.In the model of a cylindrical cavity receiver containing a helical pipe, the heat losses of the cavity400 W/m to 800 W/m , there exists a best design for achieving a highest thermal efficiency of the cavity

Keywords： cylindrical cavity receiver     3-D numerical simulation     geometric optimization     direct normal irradiation    

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Influence of boundary conditions and turntable speeds on the stability of hydrostatic oil cavity

Zhaomiao LIU, Chengyin ZHANG, Feng SHEN

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 359-368 doi: 10.1007/s11465-011-0222-2

Abstract:

The flow, bearing, and carrying capacity of the cycloidal hydrostatic oil cavity in hydrostatic turntableHowever, the increase in inlet speed, depth, and inlet radius of the oil cavity causes the vortex effectto increase and the stability of oil cavity to reduce.With the increase in the oil film thickness, the carrying capacity of the oil cavity diminishes.With the increase in turntable speed, the location and size of the vortex scope in the oil cavity flow

Keywords： hydrostatic oil cavity     flow state     oil cavity pressure     stability     vortex    

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The energesis and depressurization technology of filling solution cavity of high pressure and rich water

Zhang Mei,Zhang Minqing,Zhu Pengfei,Huang Hongjian

Strategic Study of CAE 2009, Volume 11, Issue 12,   Pages 13-19

Abstract:

Filling solution cavity of high pressure and rich water have the characteristicstechnology, adopting the energesis and depressurization technology is advanced to father filling solution cavitydepressurization technology is adopting arranged and purposeful cccurate–blasting to open out solution cavity;s influence by water pressure during the process of construction and to finish farthering solution cavity

Keywords： filling solution cavity of high pressure and rich water     the energesis and depressurization technology    

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Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 937-947 doi: 10.1007/s11709-021-0754-4

Abstract: solution for fracturing pressure in two different concentric regions of soil was presented based on the cavity

Keywords： hydraulic fracturing pressure     layered     cavity expansion theory     triaxial fracturing test     cohesive soil    

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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: applied and coupled with optical properties to predict the radiation performance of solar concentrator/cavitySeveral different cavity geometries are compared on the radiation performance.

Keywords： Monte Carlo method     solar energy     radiation performance     cavity receiver    

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Terahertz time-domain spectroscopy and micro-cavity components for probing samples: a review Special Feature on Precision Measurement and Instr

Lin CHEN, Deng-gao LIAO, Xu-guang GUO, Jia-yu ZHAO, Yi-ming ZHU, Song-lin ZHUANG

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5,   Pages 591-607 doi: 10.1631/FITEE.1800633

Abstract: further improve the signal-to-noise ratio (SNR) and enhance sensitivity, we introduce three general micro-cavity

Keywords： Terahertz (THz) time-domain spectroscopy     Micro-cavity     Metal holes array     Waveguide cavities     Spoof localized    

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Experimental study on enhanced coupling of underground explosions by water-filled cavities

Wang Zhanjiang,Cai Zongyi,Zheng Xuefeng,Zhu Yurong

Strategic Study of CAE 2009, Volume 11, Issue 4,   Pages 46-49

Abstract: There is a cavity of 0.3 m in diameter at the center of the apparatus, the cavity can be filled withThe effect of cavity decoupling in water is not as good as in cement mortar.When the explosive source is detonated in a water-filled cavity, the stress wave coupled into cement

Keywords： underwater explosions     surrounding rocks enhanced coupling     cement mortar     stress waves     cavity decoupling    

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Microcellular injection molding process for producing lightweight thermoplastic polyurethane with customizable properties

Thomas ELLINGHAM, Hrishikesh KHARBAS, Mihai MANITIU, Guenter SCHOLZ, Lih-Sheng TURNG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1,   Pages 96-106 doi: 10.1007/s11465-018-0498-6

Abstract: Two stages of cavity expansion through sequential core retractions and a third expansion in a separate

Keywords： thermoplastic polyurethane     microcellular injection molding     cavity expansion     compressive strength     hysteresis    

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Effect of triethylamine treatment of titanium silicalite-1 on propylene epoxidation

Juan XU,Yaquan WANG,Wenping FENG,Yi LIN,Shuhai WANG

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 4,   Pages 478-487 doi: 10.1007/s11705-014-1453-7

Abstract: Titanium silicalite-1(TS-1) treated with triethylamine (TEA) solution under different conditions was characterized by X-ray powder diffraction (XRD), Fourier-transform infrared spectrum (FTIR), ultraviolet-visible diffuse reflectance spectrum (UV-Vis), nitrogen physical adsorption and desorption, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The characterization results show that many irregular hollows are generated in the TS-1 crystals due to the random dissolution of framework silicon and the volume of the hollow cavities increase with increasing the TEA concentration, and the treatment temperature and time. The modified TS-1 samples improved in varying degrees the catalyst life for the epoxidation of propylene in a fixed-bed reactor probably due to the generation of the hollows to make it easy for the reactants and products to diffuse out of the channels.

Keywords： titanium silicalite-1     triethylamine     hollow cavity     epoxidation of propylene     catalyst life    

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Three-dimensional numerical simulation for plastic injection-compression molding

Yun ZHANG, Wenjie YU, Junjie LIANG, Jianlin LANG, Dequn LI

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1,   Pages 74-84 doi: 10.1007/s11465-018-0490-1

Abstract: However, the melt flow process in a closed cavity becomes more complex because of the moving cavity boundaryThe melt flow and pressure distribution in the cavity were investigated by using the proposed simulationResults reveal that the fountain flow effect becomes significant when the cavity thickness increasesThe back flow also plays an important role in the flow pattern and redistribution of cavity pressure.

Keywords： injection-compression molding     simulation     injection molding     melt flow     cavity pressure    

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Principle of Laser Nano-meter Measurement Ruler

Zhang Shulian

Strategic Study of CAE 2005, Volume 7, Issue 3,   Pages 27-34

Abstract: The principle is based on the frequency splitting, mode competition, cavity tuning, etc., of laser, whichThe configuration is that employing an inter — cavity birefringence element to split a laser frequencyfrequencies, ⊥light and // light; alternately occurring of strong and medium mode competition as the cavityThe cavity mirror of movement is joined with the object to be measured by a guide.

Keywords： displacement measurement     HeNe laser     mode competition     frequency splitting     cavity tuning     longitudinal mode    

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Title Author Date Type Operation

Effects of critical geometric parameters on the optical performance of a conical cavity receiver

Hu XIAO, Yanping ZHANG, Cong YOU, Chongzhe ZOU, Quentin FALCOZ

Journal Article

Effect of cavity defect on the triaxial mechanical properties of high-performance concrete

Yanbin ZHANG; Zhe WANG; Mingyu FENG

Journal Article

Numerical simulation of the heat flux distribution in a solar cavity receiver

Yueshe WANG, Xunwei DONG, Jinjia WEI, Hui JIN

Journal Article

―Summary of investigations on rotating cavity at IDG, RWTH Aachen University

Dieter BOHN, Jing REN,

Journal Article

Geometric optimization model for the solar cavity receiver with helical pipe at different solar radiation

Chongzhe ZOU, Huayi FENG, Yanping ZHANG, Quentin FALCOZ, Cheng ZHANG, Wei GAO

Journal Article

Influence of boundary conditions and turntable speeds on the stability of hydrostatic oil cavity

Zhaomiao LIU, Chengyin ZHANG, Feng SHEN

Journal Article

The energesis and depressurization technology of filling solution cavity of high pressure and rich water

Zhang Mei,Zhang Minqing,Zhu Pengfei,Huang Hongjian

Journal Article

Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil

Journal Article

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

Yong SHUAI, Xinlin XIA, Heping TAN

Journal Article

Terahertz time-domain spectroscopy and micro-cavity components for probing samples: a review

Lin CHEN, Deng-gao LIAO, Xu-guang GUO, Jia-yu ZHAO, Yi-ming ZHU, Song-lin ZHUANG

Journal Article

Experimental study on enhanced coupling of underground explosions by water-filled cavities

Wang Zhanjiang,Cai Zongyi,Zheng Xuefeng,Zhu Yurong

Journal Article

Microcellular injection molding process for producing lightweight thermoplastic polyurethane with customizable properties

Thomas ELLINGHAM, Hrishikesh KHARBAS, Mihai MANITIU, Guenter SCHOLZ, Lih-Sheng TURNG

Journal Article

Effect of triethylamine treatment of titanium silicalite-1 on propylene epoxidation

Juan XU,Yaquan WANG,Wenping FENG,Yi LIN,Shuhai WANG

Journal Article

Three-dimensional numerical simulation for plastic injection-compression molding

Yun ZHANG, Wenjie YU, Junjie LIANG, Jianlin LANG, Dequn LI

Journal Article

Principle of Laser Nano-meter Measurement Ruler

Zhang Shulian

Journal Article