赵悦,刘正先,赵明
Zhao Yue,Liu Zhengxian,Zhao Ming

• 1:天津大学机械工程学院

摘要(Abstract)：

以某离心压缩机为研究对象,通过改变长叶片扩压器的叶片数和叶片弦长2种方式对叶片稠度进行改变,利用数值模拟方法,以最大效率和稳定工作范围为判断依据,结合特性曲线,针对长叶片扩压器稠度的变化范围,分析了长叶片稠度的改变对离心压缩机气动性能的影响。得出如下结论:针对长叶片扩压器,不同于传统对扩压器最优稠度的选择,扩压器的稠度值在1.203 3附近时离心压缩机能达到较高的等熵效率和压比,同时具有较宽的稳定工作范围。
With a centrifugal compressor as the research object,the influence of change in the long blade solidity on the aerodynamic performance of the centrifugal compressor was analyzed with respect to the variation range of the solidity of the long blade by changing the number of blades and chord length of the blade to change the blade solidity by numerical simulation method and by using the maximum efficiency and stable operating range as the judgment basis and in combination with the characteristic curve. It was concluded that the centrifugal compressor can achieve a higher isentropic efficiency and compression ratio and has a wider stable operating range when the solidity of the long blade diffuser was around 1.203 3,which is different from the selection of traditional optimum solidity of the diffuser.

关键词(KeyWords)： 离心压缩机;叶片扩压器;稠度;数值模拟
centrifugal compressor;vaned diffuser;solidity;numerical simulation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(11672206)

作者(Author): 赵悦,刘正先,赵明
Zhao Yue,Liu Zhengxian,Zhao Ming

参考文献(References)：

• [1]刘正先,鲁寅,陈丽英.叶顶间隙对离心叶轮气动性能的影响规律[J].工程热物理学报,2014,35(4):673-677.
• [2]刘正先,吴仲义,王桂林.黏性耗散对离心压缩机气动性能的影响[J].工程热物理学报,2011,32(4):593-596.
• [3]Reddy T C S,Murty G V R,Mukkavilli P,et al.Some studies on low solidity vaned diffusers of a centrifugal compressor stage[R].ASME Paper GT2005-68972,2005.
• [4]Jongsik O,Buckley C W,Agrawal G L.et al.Numerical investigation of low solidity vaned diffuser performance in a high-pressure centrifugal compressor:Part IIItandem vanes[J].Journal of Turbomachinery,2012,134(6):061025.1-061025.8.
• [5]Pothuri V R,Govindaraju V R M,Ganapathiraju V R.Performance comparison of twisted low solidity vaned diffusers with different shapes[R].ASME Paper GT2014-26833,2014.
• [6]林彤,祁明旭,谈伟,等.扩压型式对离心压气机性能影响[J].工程热物理学报,2013,34(3):427-430.
• [7]费继友,戴冀,史敏,等.低稠度叶片扩压器形状参数的分析[J].流体机械,2007,35(6):14-17.
• [8]Hayami H,Senoo Y,Utsunomiya K.Application of a low-solidity cascade diffuser to transonic centrifugal compressor[J].ASME Journal of Turbomachinery,January 1990.
• [9]LI Xiaojian,LIU Zhengxian,LIN Yujing.Multi-point and multi-objective optimization of a centrifugal compressor impeller based on genetic algorithm[J].Mathematical Problems in Engineering,2017,2017(1):1-18.
• [10]Li X,Zhao Y,Liu Z,et al.The Optimization of a Centrifugal Impeller Based on a New Multi-Objective Evolutionary Strategy[C]//ASME Turbo Expo 2016:Turbomachinery Technical Conference and Exposition.2016:V02CT39A022.
• [11]李超.高压比离心压气机低稠度扩压器的设计[D].哈尔滨:哈尔滨工程大学,2013.
• [12]金磊.涡轮增压离心压气机非对称有叶扩压器扩稳机理研究[D].北京:清华大学,2014.