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基于CFD的焙烧炉技术改进 总被引:2,自引:0,他引:2
基于计算燃烧学的原理和CFD软件对燃烧重油的焙烧炉炉内的流动和燃烧过程进行了数值模拟计算,讨论了炉内温度场、流场的分布规律,分析了结构因素对焙烧炉内流动和燃烧分布的影响.从炉子结构的设计角度提出了解决炉内温度场、流场的分布不均匀的方案.研究表明,在设计焙烧炉时合理地布置拉砖的位置有利于改善炉内流动和燃烧的分布. 相似文献
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一台立式反应釜,其内筒体规格DN 1700×22,内筒材质为OCr18Ni10Ti;夹套规格DN 9000×10材质为16MnDR。筒体内操作压力0.2MPa,夹套内操作压力0.7MPa。筒体内操作温度为-19℃~165℃,夹套内操作温度为-23℃~170℃。筒体内介质为化工原料;夹套内介质为水蒸汽和冷却液(氯化钙),24h交换一次。 相似文献
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1 前言 “掉头”是薄壁气缸套主要破坏形式之一,严重影响主机的可靠性。原因是多方面的,与缸套、缸体及装配有关。薄壁气缸套壁厚一般只有1.5~2.5mm,凸肩越程槽外更薄,是气缸套结构上的弱点,在采用成形刀控制越程槽R,百分表测量槽深的情况下,“掉头”现象仍有发生,经检查发现,断面有显微裂纹,我们进一步分析认为与珩磨夹具结构有关。 2传统珩磨夹具 相似文献
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以某轻型柴油机为例,对爆压提升后缸孔的变形进行仿真和试验,研究缸孔变形对活塞漏气和机油消耗的影响。结果表明,仿真与测试结果一致。根据发动机缸体的特点有针对性地提出减小缸孔变形的改进方案,并通过仿真计算证明改进方案的有效性。 相似文献
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A slurry erosion tank test rig was designed and built to investigate the erosion rates of different materials and effects of the influencing parameters on material loss and erosion profiles. A CFD (computational fluid dynamics) tool is applied to study the flow impact velocity, solid concentration and particle size effects on the erosion rate of sample plates in the liquid-solid mixture in a cylindrical tank. The MRF (multiple reference frames) method is applied to model the rotating parts inside the tank. The flow behavior and liquid-solid interactions in the slurry tank test rig are simulated and the results are validated with the experimental data. It was approved that changing the height and diameter of each rotating zone (MRF zones) have a negligible effect on simulation results. It was observed that the erosion mass losses are increasing with increase in flow velocity and sand concentration. Both variations can be predicted with a logarithmic dependence of mass loss to rotational velocity and sand concentration. The increase in erosion rate by increase in particle size was also observed for three various particle size distributions. 相似文献
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Mario Miana Olga Cantín Carlos Millán José R. Valdés Carlos Bernad Jesús M. Sánchez 《Applied Energy》2011
The present paper applies Scale Analysis, numerical simulations and experimental tests to enhance the thermal design of a commercial mobile bitumen emulsion tank for road pavement. The objective is the reduction of diesel oil consumption with the lowest increment in heating time. The complexity of heat transfer in the system lies on the highly three dimensional behaviour of the fluid flow and the large disparity between characteristic length scales to be considered. Besides, the main heat transfer mechanism depends on the location. In spite of these difficulties, the proposed design achieves a reduction of 40% in diesel oil consumption with only a 28% increase in heating time. 相似文献
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某发动机的排气歧管在试验过程中出现了翘曲变型的情况。本研究利用流固耦合的方法模拟了排气歧管全速全负荷的温度场和热变形,并在此基础上提出了优化方案。优化后的设计方案顺利通过了试验考核。 相似文献