压缩机废油回收工艺小结

介绍了压缩机废油回收的原理、工艺及操作要点,达到了节油降耗的目的。     

小型轴流压气机清洗两相流场的数值模拟

针对某小型航空发动机单级轴流压气机的清洗需求,以数值模拟结合实验的方法对压气机清洗流场的各种参数进行了分析研究.在初步确定清洗方案的基础上,建立了基于S-A湍流模型的离散相数值模拟理论模型,以经验公式估算喷嘴形成的初始液滴分布,并对喷嘴的实验参数进行了校准,最后以CFD软件进行了流场的数值模拟,计算结果表明：清洗液滴不会对压气机的流场产生明显影响,平面扇形喷嘴在该小型压气机上能获得较好的清洗效果.     

煤焦小型氮肥厂采用离心压缩机联产4万吨/年低压甲醇设计

小氮肥厂采用离心压缩机对合成氨进行技术改造,联产4万吨/年低压法经济型甲醇,是煤化工C_1化学产品的发展方向。     

裂解气压缩机级间注水技术的应用

介绍了裂解气压缩机由注洗油改为注水情况，进而得出结论：改注水降温效果明显，压缩机工作效能可得到有效保障。     

Air-source heat pump coupled with economized vapor injection scroll compressor and ejector:Design and experimental research

Ejector can utilize high pressure energy from liquid mechanism,it can be used in heat pump system coupled with economized vapor injection(EVI)scroll compressor.When running under low temperature conditions,the performance of the EVI system with ejector can be improved further.In this paper,the design method of the heat pump system with ejector is presented,and the process for designing the heat pump with ejector(EVIe)was summarized.One prototype heat pump was designed under the condition of the evaporation ...     

Effects of circumferential configuration concerning splitter blade on the aerodynamic performance in a transonic axial fan

For a certain type of transonic axial fan, the flow field of a fan rotor with splitter blade was computed by numerical simulation, and the shape of the rotor was modified. The effects of different circumferential distributions concerning the splitter cascades upon the aerodynamic performance were investigated. The studies show that the optimum splitter cascade is not very close to the suction side of main blade. The load between the main blade and the splitter blade can be soundly distributed in terms of the adjustment of circumferential position of the splitter blade. The best aerodynamic performance can be successfully obtained according to the optimum shape of the expanding fluid channel reasonably formed by the splitter blade and the main blade.     

跨音压气机转子多目标气动优化设计

采用基于雷诺平均N-S方程的全三维流场模拟程序和基于多目标遗传算法的数值优化程序,对跨音压气机转子NASA Rotor37进行了优化设计。对所开发的三维N-S方程求解程序进行了实验验证,完善了多目标遗传算法与响应面方法相结合的具有全局寻优能力的优化程序,以总压比和绝热效率最大为设计目标,应用该优化方法对NASA Rotor37进行考虑中弧线和厚度分布的多目标气动优化设计。结果表明:在满足流量约束的条件下,绝热效率提高了0.7%,总压比提高了0.66%,并且优化设计时间大幅减小。     

不可逆空气热泵循环供热率密度优化

基于有限时间热力学理论,以供热率密度作为热力学优化目标,分析了恒温热源不可逆空气热泵循环的性能,导出了供热率密度与压比和换热器有效度等参数间的解析关系式,并由数值计算分析了热源温比、总热导率及压缩机和膨胀机效率等对热导率最优分配及供热率密度最优性能的影响特点。     

D-23.5/131-143氮氢气循环压缩机气阀改造

D-23．5／131-143氮氢气循环压缩机是四川美丰化工股份有限公司德阳分公司新建200kt／a合成氨及300kt／a尿素工程的关键设备之一。该压缩机装机试运行时，电机电流过大，严重影响整个系统的正常运行。通过分析发现，该压缩机气阀通流面积过小，为此，从气阀结构型式、气流通道等方面对该压缩机气阀进行改造。改造后的气阀装机投用后，压缩机电机电流得到较大幅度下降且具有良好的可靠性。     

带补气功能的制冷压缩机性能测试方法及标准制定建议

为解决目前我国在带补气的制冷压缩机性能测试方面缺乏标准依据的问题,参照GB/T 5773—2004《容积式制冷剂压缩机性能试验方法》,针对补气的2种基本类型,提出了相应测试方法,并结合测试实例给出了新标准制定的5点建议.