会展建筑中的大空间排烟系统分析

通过对会展建筑中的大空间展厅的火灾情形、排烟量及排烟方式的分析,得出了一个适合此类建筑的排烟系统设计的经济合理的参考方案.     

大空间建筑空调稀释型送风方式三维数值模拟

论述了CFD模拟大空间建筑室内空气流动的必要性;对采用稀释型送风方式的大空间建筑空调室内空气流动的速度场和温度场进行了数值模拟并对其结果进行了分析.结果表明:稀释型(上送)方式的分层空调在大空间建筑空调中是较好的送风方式.     

大型锻件热处理过程的数值模拟研究

在对大型锻件传热分析的基础上,建立了大型锻件的物理模型,对其温度场的变化规律进行了模拟计算,同时将模拟结果和实验结果进行了对比分析,并通过实例说明了热处理过程数值模拟方法的准确性和优越性,为进一步分析此类工件的组织转变和应力应变等奠定了基础.     

大线能量焊接耐火耐候建筑用钢的性能试验及应用研究

对武钢研制的大线能量焊接耐火耐候建筑用钢的力学性能、焊接性能与其典型应用进行了研究。试验结果表明：该钢具有优良的综合力学性能，在600℃温度下的屈服强度均高于其室温下屈服强度的2／3，完全满足建筑结构用钢耐火安全性的强度许用指标；该钢具有低的焊接冷裂纹敏感性，能承受大线能量(50～100kJ／cm)焊接；该钢在大型建筑应用中的实际效果良好。     

Numerical modelling of void inclusions in porous media

Numerical modelling of porous flow in a low‐permeability matrix with high‐permeability inclusions is a challenging task because the large ratio of permeabilities ill‐conditions the finite element system of equations. We propose a coupled model where Darcy flow is used for the porous matrix and potential flow is used for the inclusions. We discuss appropriate interface conditions in detail and show that the head drop in the inclusions can be prescribed in a very simple way. Algorithmic aspects are treated in full detail. Numerical examples show that this coupled approach precludes ill‐conditioning and is more efficient than heterogeneous Darcy flow. Copyright © 2003 John Wiley & Sons, Ltd.     

浅谈超浓相输送技术在85kA预焙槽的节能应用

1999年该电解铝厂引进超浓相输送技术并进行了10台电解槽工业实验，经过工业实验，确认超浓相输送技术在85kA预焙槽上应用的可行性之后，2001年完成技术改造后将此技术大规模应用于260台三个系列85kA纵向排列中间点式下料电解槽，经一年多的吸收和改进，已成功实现了这一世界先进技术在85kA纵向排列电解槽的平稳运行，不仅比原来的罐车加料方式成本更低，而且填补了超浓相输送技术在中小型预焙铝电解槽上应用的空白。     

DTM350-600磨煤机大轴断裂分析

针对陕西渭河发电有限责任公司5号炉磨煤机乙磨大轴断裂失效进行了金属分析。结果表明应加强制造质量监控和实施设备全过程金属监督。     

Microstructure of Nanostructured WC-Co Coating Prepared by Thermal Spraying

Nanostructured WC-Co coatings were produced with Atmospheric Plasma Spraying (APS) and Low Pressure Plasma Spraying (LPPS). Microstructure characteristics and phase compositions of the coatings were studied by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD) respectively. The microstructure compositions were analyzed with EDS. During APS deposition the existence of oxygen causes the decarburization of the coating, and the coating was composed of melted area and the WC/12Co powder. Besides WC phase, there was W2C phase. However in the coating deposited by LPPS the content of oxygen was so low that there were a limit degradation of the WC/12Co powder. The coatings were made up of compact block and loosen porosity area. There were large quantities of nanostructure WC grains and a small quantity of microstructure WC grains presented in the coating. Besides WC phase, a little W2C and WC1-x or Co6W6C phases occured. Consideration of the characteristics of the highly porous, spherical-shell morphology of nano-WC/12Co power, heterogeneous melting and localized superheating of the power were two main factors which caused the microstructure and phase composition of nano-WC-Co coatings.     

High‐luminance 1‐m‐long plasma tubes for wall displays

Abstract— The plasma‐tube array is expected to realize a wall‐sized display. This method will realize an emissive‐type display with a flexible screen shape and an expandable screen size. The shape of the plasma tube was investigated to realize high luminance, high luminance efficacy, and high flexural strength. As the result, a cylindroid tube is proposed to satisfy these demands. An experimental display of 1 m × 128 mm has been developed with these cylindroid tubes and it demonstrated a high luminous efficacy of 3.1 lm/W.