1) downflow-upflow
下行流-上行流
2) downward flow-upward flow
下行-上行流
3) current ratio of up line and down line
上下行电流比
1.
The fault location method is current ratio of up line and down line at power traction network of AT mode with double line.
AT供电牵引网短路故障时,故障阻抗具有非单调性,AT供电牵引网单线运行时发生短路故障,大体有2种测距方法,分别为吸上电流比法、吸馈电流比和电抗法;复线运行时有上下行电流比法。
4) declensional ventilation
下行风流
1.
In order to find more effective control measurements for declensional ventilation mine fire,the catastrophe potential function of airflow reversal in a declensional ventilated mine fire was deduced by using catastrophe theory,which indicates the airflow reversing process has discontinuous characteristics.
为了寻求下行风流火灾的有效控制途径,应用突变理论推导了下行通风主干风路风流逆转的突变势函数,揭示出其逆转过程具有突变特征,分析了下行风流逆转具有的突跳、分叉、不可达、滞后、多模态等多种非线性特征,实验验证了下行风流逆转的突变过程。
5) downflow
['daunfləu]
并流下行
1.
The mathematical model for the gas-solid heat transfer in cocurrent downflow circulating fluidized bed(CDCFB)reactor was proposed in this paper.
提出了并流下行循环流化床反应器气 -固传热模型 ,并采用稳态传热的实验方法 ,测定了并流下行循环流化床反应器中 ,不同操作条件下 ,轴向颗粒温度分布及气、固相进、出反应器的温度 ,进而利用Matlab工程数据处理软件回归求得模型参数即气 -固轴向截面传热系数及表观传热系数的值 ,并由实验结果回归得到模型参数与操作条件的经验关联式 。
6) Cocurrent downflow
并流下行
1.
Cocurrent downflow circulating fluidized bed is a new type of reactor possessing more effective gas solids contact, lower axial backmixing etc.
并流下行式循环流化床是一种具有气固接触效率高及轴相返混小等优点的反应器，有广阔的应用前景。
2.
The mathematical model for the gas-solid adsorption mass transfer in a cocurrent downflow circulating fluidized bed(CDCFB) reactor is proposed in this paper.
建立了并流下行循环流化床反应器气固吸附传质模型,并采用稳态示踪的实验研究方法,测定了下行床中气相示踪剂浓度的轴向分布,进而利用Marquardt多元非线性回归方法求得了模型参数即轴向扩散系数和传质系数的值。
3.
A feasible Laser Doppler Velocimetry technique based on Amplitude Discrimmation has been used to determine the local gas and solids velocity simultaneously, which can lead to the local slip velocity between the gas and solids in a cocurrent downflow circulating fluidized bed (CDCFB).
利用幅值鉴频的激光多普勒测速技术,同时测定并流下行循环流化床（CDCFB）中的气体和固体的局部速度,由此可以获得气固间的局部滑落速度。
补充资料：爱流
【爱流】
（譬喻）贪爱之流。贪爱能惑溺人心，譬如暴流也。心地观经一曰：“善逝恒为妙法船，能截爱流超彼岸。”
（譬喻）贪爱之流。贪爱能惑溺人心，譬如暴流也。心地观经一曰：“善逝恒为妙法船，能截爱流超彼岸。”
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条