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电弧能
相关语句
  arc energy
     The AC electric arc furnace (EAF) translates electric arc energy into heat energy in forms of arc, whose power is supplied by three phase AC provided by a special transformer.
     交流电弧炉是一种把电弧能转变为热能的冶炼设备,它采用大功率的特殊变压器供电,其电弧炉的温度、三相电流的平衡是设备的二个重要控制参数。
短句来源
     The deposition of silver in cathode surface reduced the contact resistance. The decomposition of metal oxide LaNiO_3 was propitious to extinguish arc by absorbing the arc energy.
     LaNiO3~δ复合金属氧化物在电弧高温作用下分解成单元素 ,吸收了电弧能 ,有利于灭弧 ;
短句来源
  “电弧能”译为未确定词的双语例句
     As the content exceed a critical value, the positive surface tensiontemperature coefficient controls the flow pattern completely.
     当熔池中正表面张力温度系数占优势时,熔池中的流体由熔池边缘流向中心,这种流动方式能有效地把电弧能带到熔池底部,从而使熔深大幅度增加。
短句来源
  相似匹配句对
     Study on Foamability of Oxidizing Slag in Steelmaking by Electric Arc Furnace
     电弧炉氧化性炉渣发泡性研究
短句来源
     Study on foaming character of electric furnace' s oxidizing slag
     电弧炉氧化性炉渣发泡性研究
短句来源
     Biological Mass-energy
     生物质
短句来源
     The interpretations of the Chinese character"néng 能
     释“
短句来源
     High Speed Rotating Arc Sensor
     高速旋转电弧传感器
短句来源
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  arc energy
A new analytical solution of the Elenbaas-Heller equation is derived, which generalizes the channel model of electric arc to the case when the volume radiation makes a significant contribution to the electric arc energy balance.
      
Analysis of the results showed that the addition of La2O3 makes the contact material have the following advantages: smaller electrical wear, smaller arc energy, smaller contact resistance and arc is more easily extinguished.
      
Direct measurements of the arc-induced pressure rise reveal that the portion of the arc energy available for the pressure rise varies greatly (~20%-65%) with the properties of the nozzle material.
      
Additional plasma arc energy can make the overall welding speed faster, and sensitivity to the joint clearance can be reduced by the plasma arc.
      
Radiation from the plasma column to the chamber walls and transfer of energy to the anode were the two principal modes of transfer of the arc energy.
      
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The present research work aimed at study of the element distributing in both arc region and electrode surface, and the microstructure, and morphology in DC condition. The mechanism of erosion of the material Ag-LaNiO_ 3-δ in the DC arc was probed. The results showed that the DC arc bring about the surface melt in anode and the transfer of silver ion to cathode surface. The deposition of silver in cathode surface reduced the contact resistance. The decomposition of metal oxide LaNiO_3 was propitious to extinguish...

The present research work aimed at study of the element distributing in both arc region and electrode surface, and the microstructure, and morphology in DC condition. The mechanism of erosion of the material Ag-LaNiO_ 3-δ in the DC arc was probed. The results showed that the DC arc bring about the surface melt in anode and the transfer of silver ion to cathode surface. The deposition of silver in cathode surface reduced the contact resistance. The decomposition of metal oxide LaNiO_3 was propitious to extinguish arc by absorbing the arc energy. Meanwhile the particles of LaNiO_3 suspended in the melt pool increased the viscosity of the melt, which, in turn, helped for reducing the splash of melt drop and the arc erosion. The Ag-LaNiO_ 3-δ contact material showed better performance than other materials in DC condition.

研究了Ag -LaNiO3~δ电接触材料在直流电弧作用下弧区的元素分布、材料的微观组织形貌、直流电弧作用前后的电极形貌以及电极表面的元素分布 ;探讨了Ag -LaNiO3~δ电接触材料在直流电弧作用下的转移和腐蚀机理。实验结果表明 :直流电弧引起阳极表面熔化、Ag离子向阴极转移及在阴极表面沉积 ;LaNiO3~δ复合金属氧化物在电弧高温作用下分解成单元素 ,吸收了电弧能 ,有利于灭弧 ;同时LaNiO3~δ颗粒悬浮在阳极Ag微小熔池中 ,增加了熔融Ag的粘度 ,有利于降低Ag熔滴的飞溅 ,减少了电弧烧损。Ag -LaNiO3~δ复合电接触材料显示出良好的综合电性能。

A 3-D mathematical model is developed to calculate temperature and velocity distributions in a moving TIG weld pool with different sulfur concentrations. It has been showed that, sulfur, which change the sign of surface tension coefficient, can cause significant changes in depth/width ratio. When the mass fraction of sulfur increases, the depth/width increases sharply. When the mass fraction of sulfur increased beyond 80 × 10-6, the increased sulfur did not have an appreciable difference on the weld pool size...

A 3-D mathematical model is developed to calculate temperature and velocity distributions in a moving TIG weld pool with different sulfur concentrations. It has been showed that, sulfur, which change the sign of surface tension coefficient, can cause significant changes in depth/width ratio. When the mass fraction of sulfur increases, the depth/width increases sharply. When the mass fraction of sulfur increased beyond 80 × 10-6, the increased sulfur did not have an appreciable difference on the weld pool size and shape. As the mass fraction of sulfur exceed 120 × 10-6, maximum surface-tension temperature increases beyond the calculated surface temperature, and the sign of surface tension coefficient is positive. Depending upon the sulfur concentrations, three, one, or two vortexes that have different positions, strength, and directions may be found in the weld pool. The contrary vortexes can efficiently transfer the thermal energy from the arc, creating a deep weld pool.

建立了三维移动热源作用下焊接熔池的数学模型,模拟了表面活性元素S在不同质量分数作用下的熔池中的速度场和温度场。结果表明,S元素显著地影响了熔池中的流动方式,熔池深宽比随S质量分数的增加而迅速增大,当S质量分数超过80x10-6时,深宽比趋于一定值。S质量分数小于120×10-6时,熔池表面温度高于正表面张力温度系数发生的温度范围,正、负表面张力温度系数同时存在,温度梯度在最大表面张力处最大;当S质量分数超过120×10-6时,正表面张力温度系数控制着熔池中的流体流动,液体金属从熔池边缘流向熔池中心;随着S质量分数的增加,在熔池中出现数目、大小、方向和位置不同的涡流,当涡流的方向为由熔池边缘流向熔池中心时,涡流有效地把电弧能带到熔池底部,产生较大的熔深。

A 3D mathematical model was developed to calculate the temperature and velocity distributions in a moving A-TIG weld pool with different oxygen concentrations. It is shown that the oxygen element, which changes the temperature dependence of surface tension coefficient (d^/dT) from a negative value to a positive value, can cause significant changes in the weld penetration and depth/width ratio (D/W) of the weld pool. When the oxygen content increases, the weld bead penetration and D/W increases sharply while...

A 3D mathematical model was developed to calculate the temperature and velocity distributions in a moving A-TIG weld pool with different oxygen concentrations. It is shown that the oxygen element, which changes the temperature dependence of surface tension coefficient (d^/dT) from a negative value to a positive value, can cause significant changes in the weld penetration and depth/width ratio (D/W) of the weld pool. When the oxygen content increases, the weld bead penetration and D/W increases sharply while the weld metal width decreases. When oxygen content exceeds 150×10-6, the surface temperature decreases and then remains a constant. When the oxygen content increased beyond 200×10-6, the increase in oxygen content did not effect the weld pool size and shape. As the oxygen content is less than 300×10-6, negative and positive γ/ T exist at the same time in the weld pool. The increase of oxygen content and the decrease of surface temperature can extend the region of positive surface tension coefficient and increase the depth of the pool. As the oxygen content exceed 300 ×10-6 the temperature at the maximum surface tension increases beyond the simulated maximum surface temperature, and γ/ T is positive. Depending upon the oxygen concentrations, three, one, or two vortexes with different positions, strengths, and directions may be found in the weld pool. The contrary vortexes can efficiently transfer the thermal energy from the arc, creating a deep weld pool.

建立了三维移动热源作用下焊接熔池的数学模型,模拟了不同氧含量下熔池中的速度场和温度场.结果表明,氧化物活性剂中的氧元素改变了熔池中的表面张力温度系数,从而影响熔池中的流动方式,是熔深和深宽比增加的重要原因;随着氧含量的增加,深宽比和熔深急剧增加,熔宽减小.当氧含量超过150×10-6时,增加氧量,熔池表面最高温度减小,并逐渐趋于一定值;当氧含量超过200×10-6时,深宽比、熔深和熔宽趋于一定值;氧含量小于300×10-6时,熔池表面最高温度高于正表面张力温度系数作用的温度范围,正、负表面张力温度系数在熔池中同时存在.当氧含量超过300×10-6时,熔池表面最高温度处于正表面张力温度系数作用的温度范围之内,熔池中的表面张力温度系数为正值;随着氧含量的增加,在熔池中出现数目、大小、方向、位置不同的涡流,当两个涡流的方向均由熔池边缘流向熔池中心的环流时,涡流有效地把电弧能带到熔池底部,产生较大的熔深和深宽比.

 
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