期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
Research on the Teaching Reform of Polymer Materials Foundation Course-Based on the Case Analysis Method
1
作者 Yinjie Wang Jiping Liu +1 位作者 Jia Han Xingyan Xu 《Journal of Contemporary Educational Research》 2021年第10期126-130,共5页
In today's education and teaching reform,the traditional teaching method in the teaching of polymer materials has been gradually replaced with various new teaching methods.Among them,the case analysis method is a ... In today's education and teaching reform,the traditional teaching method in the teaching of polymer materials has been gradually replaced with various new teaching methods.Among them,the case analysis method is a very efective teaching method,which has been applied to the teaching of polymer materials.Through example-based teaching,students 125 participation can be effectively improved,and their theoretical knowledge can be fully utilized.This would have a positive role in promoting the improvement of students'knowledge system and their learning ability.In regard to this,this article analyzes the application of case analysis in the teaching of polymer materials so as to improve its efficiency and quality. 展开更多
关键词 Polymer materials foundation course Case analysis method Classroom teaching Teaching reform
下载PDF
Experimental Investigation and X-Ray Computed Microtomography Simulation on Thermal Physical Properties of Foundation Materials after Molten Salt Leakage in the Storage Tank
2
作者 WANG Zhaowen ZHOU Hao +3 位作者 LUO Jiawei LI Yawei FANG Hao LIU Tianxiao 《Journal of Thermal Science》 SCIE EI CAS CSCD 2024年第2期591-601,共11页
This paper studied the thermal physical properties of foundation materials in the molten salt tank of thermal energy storage system after molten salt leakage by Transient plane source experiment and X-ray computed mic... This paper studied the thermal physical properties of foundation materials in the molten salt tank of thermal energy storage system after molten salt leakage by Transient plane source experiment and X-ray computed microtomography simulation methods.The microstructure,thermal properties and pressure resistance with different particle diameters were addressed.The measured heat conductivities from Transient plane source experiment for three cases are 0.49 W/(m·K),0.48 W/(m·K),and 0.51 W/(m·K),and the porosity is 30.1%,30.7%,and 31.2% respectively.The heat conductivity simulating results of three cases are 0.471 W/(m·K),0.482W/(m·K),and 0.513 W/(m·K).The ratio of difference between the results of simulation and Transient plane source measurement is as low as 1.2%,verifying the reliability of experimental and simulation results to a certain degree.Compared with the heat conductivity of 0.097-0.129 W/(m·K) and porosity of 71.6%-78.9% without leaking salt,the porosity is reduced by more than 50% while the heat conductivity increased by 4 to 5 times after molten salt leakage.This significant increase in heat conductivity has a great impact on security operation,structure design,and modeling of the tank foundation for solar power plants. 展开更多
关键词 heat conductivity X-ray computed microtomography foundation materials three-phase threshold algorithm molten salt leakage
原文传递
Effect of partial elastic foundation on free vibration of fluid-filled functionally graded cylindrical shells 被引量:2
3
作者 Young-Wann Kim 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2015年第6期920-930,共11页
The free vibration characteristics of fluid-filled functionally graded cylindrical shells buried partially in elas- tic foundations are investigated by an analytical method. The elastic foundation of partial axial and... The free vibration characteristics of fluid-filled functionally graded cylindrical shells buried partially in elas- tic foundations are investigated by an analytical method. The elastic foundation of partial axial and angular dimen- sions is represented by the Pasternak model. The motion of the shells is represented by the first-order shear defor- mation theory to account for rotary inertia and transverse shear strains. The functionally graded cylindrical shells are composed of stainless steel and silicon nitride. Material prop- erties vary continuously through the thickness according to a power law distribution in terms of the volume fraction of the constituents. The governing equation is obtained using the Rayleigh-Ritz method and a variation approach. The fluid is described by the classical potential flow theory. Numerical examples are presented and compared with existing available results to validate the present method. 展开更多
关键词 Functionally graded material· Fluid-filledshell· Pasternak elastic foundation · Vibration
下载PDF
Analysis of Flowing and Heat Transfer of Commercial Molten Nitrate in Porous Foundation Material
4
作者 SHI Hua ZHOU Hao +4 位作者 MENG Hanxiao LV Laiquan LIU Tianxiao ZUO Yuhang CEN Kefa 《Journal of Thermal Science》 SCIE EI CAS CSCD 2023年第4期1455-1465,共11页
The leakage accident of molten salt in the thermal storage tank will cause the shutdown and enormous economic losses of Concentrated Solar Power plants.This study investigates the heat transfer and flow characteristic... The leakage accident of molten salt in the thermal storage tank will cause the shutdown and enormous economic losses of Concentrated Solar Power plants.This study investigates the heat transfer and flow characteristic of commercial molten nitrates leaking in the thermal state porous foundation material.The migration width and depth of three molten nitrates,Solar Salt(60 wt%NaNO_(3)-40 wt%KNO_(3)),Hitec XL(7 wt%NaNO_(3)-45 wt%KNO_(3)-48 wt%Ca(NO_(3))_(2))and Hitec(7 wt%NaNO_(3)-53 wt%KNO_(3)-40 wt%NaNO_(2)),are obtained at different operating temperatures.Experimental results indicate that the temperature rising rate of foundation material in the nitrate leaking process has a trend of first increasing rapidly and then decreasing,and then it increases slightly as the depth increases.The temperature rising rate increases obviously with increasing operating temperature of the molten salt.With the increase of the operating temperature,the distances from the storage tank bottom to solid salt in foundation and the total migration depths both increase obviously,while the average migrating widths change slightly.At the same operating temperature,the temperature rising rate of the foundation material where Hitec XL and Hitec salt leak is significantly greater than that with Solar Salt,which is closely related to the melting points of molten salts.The migration depth of Hitec is 95.03%greater than that of Solar Salt and 19.11%larger than that of Hitec XL at the operating temperature of 300℃.Compared with Hitec XL,the leakage of Hitec with a smaller viscosity has a larger temperature rising rate and a wider and deeper transporting range during the leakage process.This work could guide the installation locations of the leak detection devices for high temperature storage tank and the environmental treatment of leaking accident. 展开更多
关键词 NITRATE foundation material leaking flow heat transfer
原文传递
Experimental investigation of migration and solidification of molten salt leaking through tank cracks
5
作者 Hua SHI Hao ZHOU +4 位作者 Peng-nan MA Jian-kang WANG Hao FANG Jia-wei LUO Kun-zan QIU 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2021年第12期979-991,共13页
Molten salt is often used for heat transfer and thermal energy storage in concentrated solar power.Molten salt leakage and migration is a significant issue in its application.Molten salt migration and solidification i... Molten salt is often used for heat transfer and thermal energy storage in concentrated solar power.Molten salt leakage and migration is a significant issue in its application.Molten salt migration and solidification in thermal porous foundation materials through cracks are experimentally investigated.The impact of factors,including crack length and width,operation temperature,and leakage mass of molten salt,are studied through an experimental device modeling the leakage of the actual molten salt storage tank.Experimental results show that the crack width and length slightly affect the migration depth,but directly affect the shape of the agglomeration of solidified salt and porous foundation material.The most important factor affecting the migration depth of molten salt leaking through cracks is the tank operating temperature.The molten salt migration depth when the operating temperature is 500℃ is 95.8% higher than that with an operating temperature of 300℃.As the leakage molten salt mass reached 400 g,the average migration width increased by 23.6%,but the migration depth only increased by 5.2%.It is found that the foundation material temperatures after leakage accidents increase with an increase in the mass of leaked molten salt. 展开更多
关键词 Molten salt Leaking MIGRATION CRACK foundation material
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部