天然气管线四级离心压缩机级间气动影响研究

发布时间：2018-05-17 04:03

本文选题：多级压缩机 + 级间影响　；参考：《工程热物理学报》2017年04期

【摘要】：本文以某天然气管线用四级离心压缩机为研究对象,通过数值分析压缩机在整机模型、逐级叠加模型和单独模型下的流场和气动性能,研究多级离心压缩机的级间气动影响规律及作用机制。结果表明,在设计工况下,逐级叠加模型的预测精度具有一定的可信度,而在非设计工况下,级间气动影响显著,逐级叠加模型得到的整机总压比低于整机模型;相对于单独模型,整机模型的第二级进口相对马赫数和气流角沿叶高方向分布更为不均,在近喘工况尤为明显;级间影响会破坏通流区流动稳定性,在多级离心压缩机设计过程中应充分考虑级间影响。研究工作对深入了解级间气动影响并完善多级离心压缩机气动性能预测模型具有参考价值。
[Abstract]:In this paper, the flow field and aerodynamic performance of a four-stage centrifugal compressor used in a natural gas pipeline are numerically analyzed under the model of the whole machine, the superposition model and the single model. The law and mechanism of stage aerodynamic effect of multistage centrifugal compressor are studied. The results show that the prediction accuracy of the stepwise superposition model has certain credibility under the design condition, but in the off-design condition, the aerodynamic effect between the stages is significant, and the overall pressure ratio of the whole machine is lower than that of the whole machine model by the stepwise superposition model. Compared with the single model, the relative Mach number and the air flow angle of the second inlet of the whole model are more unevenly distributed along the direction of the blade height, especially in the close panting condition, and the influence of stages will destroy the flow stability of the flow zone. In the design process of multistage centrifugal compressor, the influence between stages should be fully considered. The research work has reference value for further understanding the influence of interstage pneumatic and improving the prediction model of the aerodynamic performance of multistage centrifugal compressor.
【作者单位】：西安交通大学能源与动力工程学院;沈阳鼓风机集团股份有限公司;中国船舶重工集团公司第七○四研究所;
【基金】：国家重点研发计划课题(No.2016YFB0200903) 国家自然科学基金项目(No.51406148) 教育部重大科技基础设施培育计划课题
【分类号】：TE974

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