离心压缩机中实际气体的热物性及气动性能研究

发布时间：2018-03-31 21:43

本文选题：实际气体　切入点：在线监测　出处：《天津大学》2012年硕士论文

【摘要】：离心压缩机具有体积小、单机压比高、效率高等优点,广泛应用于能源、化工、航空动力等重要领域,其运行性能的在线监测问题也越来越受到人们的重视。本文从实际气体热力学参数和压缩机性能参数的计算出发,推导了实际气体纯物质及混合物的热力学参数计算方法,以及压缩机性能参数的计算原理与方法,并利用LabVIEW软件开发平台编制了“实际气体物性计算系统”和“离心压缩机性能在线监测系统”。其中,“实际气体物性计算系统”在实际气体的热力性质计算过程中,采用了L-K方程对实际气体的纯组分及混合组份的热力学参数进行计算,提高了计算的精确性。“离心压缩机性能在线监测系统”基于离心压缩机性能计算原理与方法,利用实际气体热力学参数的计算结果进行压缩机的性能计算,得到了表征压缩机性能的重要参数,如:多变效率、轴功率、总压比等。将压缩机的性能参数计算与运行状态进行实时连接,达到程序界面上的同步监测与显示。与试验的验证分析结果表明,该系统的计算结果准确,能够很好的满足工程计算的要求。本文开发的实际气体的热力性质及离心压缩机的气动性能计算与在线监测软件系统,对叶轮机械领域的实际工程应用有指导意义。
[Abstract]:Centrifugal compressor has the advantages of small volume, high pressure ratio and high efficiency. It is widely used in many important fields such as energy, chemical industry, aeronautical power and so on. Based on the calculation of actual gas thermodynamic parameters and compressor performance parameters, this paper deduces the calculation method of thermodynamic parameters of real gas pure substances and mixtures, as well as the calculation principle and method of compressor performance parameters. By using the LabVIEW software development platform, the "actual gas physical properties calculation system" and "centrifugal compressor performance on-line monitoring system" are developed, in which the "actual gas physical property calculation system" is used in the calculation of the thermodynamic properties of the actual gas. The L-K equation is used to calculate the thermodynamic parameters of the pure and mixed components of the actual gas. The accuracy of the calculation is improved. The performance online Monitoring system of centrifugal Compressor is based on the principle and method of performance calculation of centrifugal compressor. The performance of the compressor is calculated by using the calculation results of the actual thermodynamic parameters of gas, and the important parameters that characterize the performance of the compressor are obtained, such as variable efficiency, shaft power, etc. The calculation of the compressor performance parameters and the running state are connected in real time to achieve the synchronous monitoring and display on the program interface. The results of verification and analysis with the test show that the calculation results of the system are accurate. Can well meet the requirements of engineering calculation. In this paper, the thermodynamic properties of the actual gas and the calculation and on-line monitoring software system of the aerodynamic performance of centrifugal compressor are developed, which is of guiding significance to the practical engineering application in the field of impeller machinery.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH452

【参考文献】