超低温离心式冷压缩机通流部分设计与分析

发布时间：2018-07-17 06:00

【摘要】：冷压缩机设计目标总压比为15,设计为三级串联运行,设计压比分别为3.2,2.5,1.875,压缩工质为超低温负压氦气。通过气动计算与模拟优化,得到了合理的三级冷压缩机各级转速与各项几何参数。通过CFD模拟计算,得到了三级冷压缩机在设计工况下的流量、压比和等熵效率值。并以第一级为例,对压缩机内部模拟流场进行了分析,表明设计冷压缩机内部流场压力分布均匀,没有出现较大的流动分离与激波。通过对各级冷压缩机选取大量工况点进行模拟计算,得到了各级的预估工作性能曲线。结果表明,各级的设计都满足流量范围随级数增加而增大的要求,且各级目标工况处都在该级的高效区范围内,能够满足设计目标。
[Abstract]:The total pressure ratio of the cold compressor is 15, the design is three stage series operation, the design pressure ratio is 3.2U 2.5N 1.875, and the compressed working medium is ultra-low temperature negative pressure helium gas. Through aerodynamic calculation and simulation optimization, reasonable rotational speed and geometric parameters of three-stage cold compressor are obtained. Through CFD simulation calculation, the flow rate, pressure ratio and isentropic efficiency of the three-stage cold compressor under the design condition are obtained. Taking the first stage as an example, the internal simulated flow field of the compressor is analyzed. It is shown that the pressure distribution of the flow field in the design cold compressor is uniform and there is no large flow separation and shock wave. By selecting a large number of working conditions to simulate and calculate the cold compressor at all levels, the predicted working performance curves of all levels are obtained. The results show that the design at all levels can meet the requirements of increasing the flow range with the increase of the series, and the target working conditions of all levels are within the range of high efficiency of the level, which can meet the design objectives.
【作者单位】：航天低温推进剂技术国家重点实验室(中国科学院理化技术研究所);中国科学院大学;
【分类号】：TB652

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