采用不同损失模型的低温透平膨胀机性能分析  

Performance analysis of cryogenic turbo-expander with different loss models

作　　者：陈兴亚 杨申音 赵炜[1] 张蓓乐 张泽[1] 陈双涛[1] 侯予[1] Chen Xingya;Yang Shenyin;Zhao Wei;Zhang Beile;Zhang Ze;Chen Shuangtao;Hou Yu(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Beijing Institute of Aerospace Testing Technology,Beijing 100074,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]北京航天试验技术研究所,北京100074

出　　处：《低温工程》2021年第2期7-11,88,共6页Cryogenics

基　　金：国家自然科学基金(51776148、51776150);陕西高校青年创新团队基金。

摘　　要：针对氦气低温透平膨胀机变工况热力性能预测,研究了透平膨胀机各通流部分损失机理,并根据一维无量纲流动控制方程,采用基于焓降的损失系数分析了各部件内流动损失,结合各部件流动特性,确定了适合各通流部件的损失系数计算关联式,进一步开展了氦低温透平膨胀机变膨胀比和变转速的热力性能模拟研究,绘制了透平性能曲线,获得了透平膨胀机变膨胀比和变转速下的热力性能。The mechanism of flow passage losses in turbo-expander was investigated refer to the off-design performance prediction of the helium turbo-expander.With one-dimensional dimensionless flow governing equations,the flow loss of each component was analyzed by the loss coefficients based on enthalpy drop.Combined with the flow characteristics of each component,the correlation formulas for calculating the loss coefficient of each component were determined.Numerical simulation of the thermal performance of the turbo-expander with variable expansion ratio and variable speed was carried out,and the performance curve was obtained.The thermodynamic performance of the turbo-expander with variable expansion ratio and rotating speed was described theoretically.

关 键 词：透平膨胀机 损失模型 变工况 性能分析 

分 类 号：TB653[一般工业技术—制冷工程]