可调进口导叶离心压缩机叶轮载荷的数值分析
发布时间：2019-01-05 01:53
【摘要】：离心式压缩机在国民经济各行业中占有重要的地位,特别是在冶金、石油、化工及动力等行业。近几十年来,现代工业的快速发展一方面促使离心压缩机的设计和制造水平快速提高,另一方面也对离心压缩机的研究提出了日益苛刻的要求。但是由于某些原因,目前国内离心压缩机在技术水平,产品质量,成套性等方面与国外还有很大差距,尤其是在大型化方面还面临技术不成熟、容量不足等很多问题,因此,提高离心式压缩机的工作效率、扩大其应用范围、提高运行的安全和可靠性,不仅对离心压缩机大型化、国产化有着重要的意义,而且对我国工业发展水平的提高也会起到积极的推动作用。 本文应用CFD软件平台NUMECA,针对东北某石化企业某型号带前置导叶的离心压缩机,搭建了基于真实几何结构的离心压缩机内部流场的分析模型,对该压缩机在不同进口导叶开度下的内部流场与性能进行了数值模拟分析；分析了导叶不同开度下、非定常条件下的叶轮载荷分布,并对数值模拟结果进行分析,并就相关参数对产品可靠性的影响提供了修改建议。 为降低负载对叶片可靠性的影响,本文就相关参数调整提供的主要建议有：模拟结果表明,叶片上的压力脉动与导叶开度密切相关；在导叶开度数值较小的区间(-20°,20°)内,效率压比等性能参数下降不大,而在导叶开度较大时,离心压缩机性能明显降低,且叶片表面的载荷值较高,机组叶片损坏的可能性也更大。
[Abstract]:Centrifugal compressors play an important role in national economy, especially in metallurgy, petroleum, chemical and power industries. In recent decades, the rapid development of modern industry has promoted the rapid improvement of the design and manufacture of centrifugal compressors, on the other hand, it has put forward increasingly demanding requirements for the research of centrifugal compressors. However, due to some reasons, there is still a big gap between domestic centrifugal compressors and foreign countries in technical level, product quality, complete sets, etc., especially in large scale, they still face a lot of problems such as immature technology, insufficient capacity and so on. Therefore, Improving the work efficiency of centrifugal compressor, expanding its application range, and improving the safety and reliability of operation are not only of great significance to the large-scale centrifugal compressor, but also to the localization of centrifugal compressor. And will also play a positive role in promoting the level of industrial development in China. In this paper, the CFD software platform NUMECA, is applied to a certain type of centrifugal compressor with front guide vane in a petrochemical enterprise in Northeast China, and an analysis model of the internal flow field of centrifugal compressor based on real geometry structure is built. The internal flow field and performance of the compressor under different inlet guide vane openings are numerically simulated and analyzed. The load distribution of impeller under unsteady conditions under different openings of guide vane is analyzed. The numerical simulation results are analyzed, and suggestions for modification of the influence of relevant parameters on product reliability are provided. In order to reduce the influence of the load on the reliability of the blade, the main suggestions for adjusting the relevant parameters are as follows: the simulation results show that the pressure pulsation on the blade is closely related to the opening of the guide vane; In the range of -20 掳, 20 掳of guide vane opening, the performance parameters such as efficiency and pressure ratio decrease little, but the centrifugal compressor performance decreases obviously and the load value of blade surface is higher when the guide vane opening is larger. Unit blade damage is also more likely.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH452
本文编号：2401104
[Abstract]:Centrifugal compressors play an important role in national economy, especially in metallurgy, petroleum, chemical and power industries. In recent decades, the rapid development of modern industry has promoted the rapid improvement of the design and manufacture of centrifugal compressors, on the other hand, it has put forward increasingly demanding requirements for the research of centrifugal compressors. However, due to some reasons, there is still a big gap between domestic centrifugal compressors and foreign countries in technical level, product quality, complete sets, etc., especially in large scale, they still face a lot of problems such as immature technology, insufficient capacity and so on. Therefore, Improving the work efficiency of centrifugal compressor, expanding its application range, and improving the safety and reliability of operation are not only of great significance to the large-scale centrifugal compressor, but also to the localization of centrifugal compressor. And will also play a positive role in promoting the level of industrial development in China. In this paper, the CFD software platform NUMECA, is applied to a certain type of centrifugal compressor with front guide vane in a petrochemical enterprise in Northeast China, and an analysis model of the internal flow field of centrifugal compressor based on real geometry structure is built. The internal flow field and performance of the compressor under different inlet guide vane openings are numerically simulated and analyzed. The load distribution of impeller under unsteady conditions under different openings of guide vane is analyzed. The numerical simulation results are analyzed, and suggestions for modification of the influence of relevant parameters on product reliability are provided. In order to reduce the influence of the load on the reliability of the blade, the main suggestions for adjusting the relevant parameters are as follows: the simulation results show that the pressure pulsation on the blade is closely related to the opening of the guide vane; In the range of -20 掳, 20 掳of guide vane opening, the performance parameters such as efficiency and pressure ratio decrease little, but the centrifugal compressor performance decreases obviously and the load value of blade surface is higher when the guide vane opening is larger. Unit blade damage is also more likely.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH452
【参考文献】
相关期刊论文 前2条
1 戴韧，陈康民;不可压粘性流动N－S耦合方程的有限元解法──I理论[J];上海理工大学学报;1995年02期
2 谭佳健;毛义军;祁大同;王锐;王学军;;离心式压缩机可调进口导叶研究综述[J];风机技术;2006年03期
，本文编号：2401104
本文链接：https://www.wllwen.com/kejilunwen/jixiegongcheng/2401104.html
