【作者】 高健；

【导师】 冀春俊；

【作者基本信息】 大连理工大学 ， 流体机械及工程， 2014， 硕士

【摘要】 离心式压缩机在航空航天、能源、化工及冶金等领域发挥着极其重要的作用。因此,国家近年来不断加大对其的研究开发。离心压缩机的高效、稳定运行,能够保证机器的合理化运转,降低生产成本。由于离心压缩机在工业生产中的重要作用,各个企业都不断地对其进行优化改进。而压缩机的静止部件——进气室,作为压缩机运行过程中的必要一环,无疑占据着重要的地位。压缩机进气室设计合理性、进气均匀性是压缩机效率的重要保证。目前,市场上的压缩机进气室进气损失大概在5%-15%。有鉴于此,压缩机进气室设计有很大的提升空间。本文以某公司一台压缩机进气室为研究对象,运用数值模拟手段,实现对此台压缩机的改造工作。全文采用三维造型软件Pro/E对原有图纸进行建模,采用NUMECA软件IGG和Auto/Grid5模块对所建造的模型进行网格划分,采用Fine/Turbo模块对网格划分之后的模型进行计算,采用CF—view模块对所获结果进行分析。本文对进气室的改进是从进气室顶端型线修改和在进气室进口处添加分离隔板两方面进行。结果表明,改进效果显著。经过数值模拟发现,改进后模型进气室出口均匀性大大提升,效率较原模型相比提升6个百分点。同时,本文将改进之后的进气室模型应用于压缩机级间加气中。观察加气气流角、加气均匀性对整机效率的影响。将此进气室修改模型设计方法推广应用于所有离心压缩机进气室设计上。此种做法将大大降低机器的运行成本,提升改进后压缩机产品的市场竞争力。更多还原

【Abstract】 Centrifugal compressors play an extremely important role in the aerospace, energy, chemical, metallurgy and other fields. As a reason of that, our country continued to increase researches about it in recent years. Efficient and stable operation of the machine ensures the rationalization of centrifugal compressor and reduces production costs. Because of the important role of the centrifugal compressor in industrial production, all companies are continually optimizing it to improve the efficiency. The gas chamber, which is one necessary part of the stationary parts in compressor, has no doubt that in a pivotal position. A reasonable compressor inlet chamber design and the uniformity of the inlet compressor efficiency are two kinds of important guarantees. Currently, the compressor inlet chamber loss is about5%-15%on the market. For this reason, compressor inlet chamber design has greatly improved space.In this paper, we use a company’ s compressor inlet chamber model, which needs improved, to study. We use numerical simulation in order to achieve the compressor transformation. In this paper, we fulfill the3D modeling with the software Pro/E, use IGG and Auto/Grid5to mesh the model. And we also calculate the model with software Fine/Turbo. On the last step, we analyze the results with software CF-view. After that, we improve the inlet chamber from two aspects:the top of inlet chamber and the inlet of the chamber. The improved results are obvious. After simulation, we found that the efficiency of the improved model increases6percent more than the original model and the uniformity of the inlet chamber was greatly enhanced.Intake chamber model improved in this paper will be filled between the compressor stages. This model will be extended to all centrifugal compressor inlet chamber design. This approach would greatly reduce the operating costs of the machine and make compressor products more competitive on the market.更多还原