solid bed meaning in English
定床
坚硬层
Examples
- With the ballastless track technology extensive used , the problem of the track on solid bed damage and rectification is paid more and more attention now
摘要随着无碴轨道技术的广泛运用，整体道床产生的病害及维修问题也越来越引起重视。 - In this paper , high heat penetration into a moving particulate bed is described mathematically with a comprehensive heat and mass transfer model . the distribution of gas velocity and pressure , the temperature field of gas and solid in the moving particulate bed are examined for different conditions . the results show that thermal penetration into the moving packed - bed particles by fluid flow in porous media is high only in the position near the gas entrance . the thermal penetration thickness tends to increase with the fluid flow velocity and decrease with the particle moving velocity . in the region of thermal penetration , the porosity of solid bed has significant effect on gas field and pressure loss . it is feasible to reduce the gas pressure loss by a larger width / height packed bed in design and operation . the correspondence between thermal infection depth and particle bed height would be helpful to keep high oapacity of reactor and reduce the cost of operation
针对移动颗粒床中物料层内的高温气体渗流传热现象，考虑渗流与传热的相互作用，采用局部非热平衡假设建立了多孔介质渗流传热物理数学模型并进行了数值计算.研究了不同情况下床内填充多孔介质中的流速、气固温度和床层压力损失.计算结果表明，高温热气对移动床颗粒料层的热渗透主要发生在渗流入口端区域，增大入口渗流速度以及减小床层物料下移速度将导致物料温度沿床高慢速下降，热渗透深度扩大，热渗透作用区域内的物料温度水平提高.在热渗透作用区域，孔隙率对流场和压力损失有很大的影响.研究结果对于移动颗粒床反应器的设计与运行具有一定的参考作用 - Fluidization has been assumed as an efficient means of contacting different particles in various fields such as chemical , metallurgical and pharmaceutical industries . however , the hydro - dynamical behavior of gas - solid bed is very complex . in this paper , based on a large amount of experimental data , complexity theory are adopted as a new method to study on the multi - signals especially pressure signal in wide flow region in gas solid fluidized bed which respective diameter are 114mm and 250mm
本文在气固流化床中引入复杂性理论作为主要的研究工具，在114mm和250mm床径气固流化床中进行了大量的实验，选用分别属于a类和b类的粒子作为固体颗粒，在宽流域的范围内对流化床压力信号、颗粒浓度信号，尤其是压力信号进行了研究。