Results 21 to 30 of about 1,446 (153)
Numerical simulation study on the effect of gas extraction in one face and four lanes on the spontaneous combustion of coal remains in the mining area [PDF]
In order to study the “three zones” of spontaneous combustion in gob under different gas treatment conditions of high gas prone to spontaneous combustion and the change law of temperature field distribution, combined with the actual conditions of a high ...
Lixin WANG +3 more
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Analysis of crack evolution in large-volume concrete based on thermal mechanical coupling finite element method [PDF]
With the continuous increase in large-scale engineering projects, large-volume structures are encountering quality control issues during the concrete pouring process.
Anbing QIU
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A Technology and Application of Fiber Temperature Sensor for High Voltage Circuit Breaker [PDF]
, 2015 随着中国经济的高速发展，电网规模的日益庞大，高压断路器作为电力系统中必不可少的电气设备之一，其工作状态是否正常关乎整个电力系统能否安全高效地运行。为了避免高压断路器因电阻过大或其他故障引起的局部温度超过国家标准而引发停电、火灾等大规模事故，对高压断路器的温度进行实时监测是十分必要的。 针对10KV断路器在线温度监测难的问题，本文提出一种基于反射式强度调制的光纤温度传感系统。本温度传感系统具有非接触、抗电磁干扰能力强、安装便利、性能稳定等优点，此外，本文选用双金属片作为温度敏感元件，价格低廉 ...
单晓宇
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Numerical simulation of flow and heat transfer characteristics of LNG cryogenic corrugated hoses [PDF]
, 2023 LNG corrugated hoses have better flexible mechanical properties and compliance. However, due to the influence of its outline structure and the large heat transfer coefficient, large heat loss is caused during LNG transportation, with the transportation ...
Changxu WU, Junpeng LIU, Taihong YANG
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Microwave drying kinetic characteristics of yellow phosphorus-like materials [PDF]
Yellow phosphorus is an important industrial raw material used in pharmaceuticals, food, pesticides, the military, and the chemical industry, significantly impacting the economy.
hang LI, jiayu HE, lei XU, yongfen SUN
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Experimental Study on Ice Slurry Vertical Open Display Cabinet with Central Refrigeration [PDF]
, 2011 Display cabinet is important user oriented equipment in supermarkets and retail terminals.In this paper,one new type product was developed using frozen water instead of refrigerating fluid which combined central refrigeration and ice storage technology ...
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Study on laser lift-off of GaN material in low pressure [PDF]
, 2014 为了研究低压环境对激光剥离的影响,利用准分子激光剥离系统和真空腔对gAn/蓝宝石样品分别在低压下和常压下进行多脉冲激光照射,之后用台阶仪测量样品的分解深度,得知相比常压环境,低压下gAn分解深度在脉冲次数为10次、20次、30次时分别增加了为10.2%,19.0%,24.3%,之后结合gAn材料分解过程和脉冲激光照射gAn/蓝宝石结构过程进行理论分析得到相应低压和常压下的gAn材料的理论分解深度,得到与实验一致的趋势。证明了低压环境能提高激光剥离速率。In order to study the ...
刘宝林 +5 more
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Guangtongxin yanjiu, 2018 针对温度变化对光纤复合低压电缆（OPLC）传输性能的影响,综合考虑电缆温度场分布以及材料膨胀系数不同导致的应力差分布特性,建立了OPLC温度变化与传输损耗的数学模型。在此基础上,设计了基于电力场、光场、温度场和应力场等多物理场耦合的仿真模型,采用有限元分析方法,结合COMSOL Multiphysics仿真软件,分别模拟了OPLC在稳定运行状态和短路故障状态下的温度分布及光单元传输损耗特性。仿真结果表明,OPLC在稳定运行状态和短路故障状态下的温度分布及传输损耗与理论计算基本相符 ...
许刚 +4 more
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Gaoya dianqi, 2019 温升是影响油浸式变压器正常运行的重要因素,为了得到变压器的温度场分布,提出一种基于混合方法的多物理场计算方法。对于油浸式变压器流体场和温度场的强耦合问题,混合方法考虑了温度对媒质物性参数的影响,采用迎风有限体积法和迎风有限元法依次计算流体场和温度场,即流体场和温度场依次循环求解,最终得到油浸式变压器启动过程瞬态温度场和稳态温度场。为了验证文中算法的有效性,采用换流变压器二维简化模型,分别采用文中方法和多物理场仿真软件Comsol计算了常温下的稳态温度场,计算结果验证了混合方法的准确性和有效性 ...
刘刚 +4 more
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