二维码（扫一下试试看！） | | 电驱动离心压气机叶型分析及设计 | | Analysis on Blade Characteristics of Low Specific Speed Electric-Compressors | | 投稿时间：2020-02-18 | | DOI：10.15918/j.tbit1001-0645.2019.290 | | 中文关键词:低比转速电动压气机叶型 | | English Keywords:low specific speedelectric-compressorblade characteristics | | 基金项目: | | | 摘要点击次数:546 | | 全文下载次数:287 | | 中文摘要: | | 通过分析基于电机驱动压气机的性能要求和工作特点，得到可运行于低转速范围下的高效电动压气机叶轮设计策略.对比普通车用涡轮增压离心压气机叶轮J90和电动压气机叶轮JE90以及分析两种不同应用场合的叶轮的子午流道外形、叶片角分布和叶片载荷分布等存在的差异，得到低比转速电动压气机叶轮叶型的几何设计规律和策略.结果表明：优化子午流道外形可以改善流动情况，减小二次流损失；分流叶片后掠可以增大失速裕度和稳定工作裕度，叶轮尾部叶片角分布中可以选择较小的出口叶片角以提高其做功能力，加大吸力面和压力面的载荷差距，即压差更大可增强对空气做功能力；主叶片厚度最大值不宜过大且保证在中间跨度的厚度分布均匀. | | English Summary: | | In this paper, the performance requirements and design characteristics of the electric-compressor were analyzed to conceive a conceptual design for the blade of electric-compressor, running with low specific speed and high efficiency. The performance of the centrifugal compressor impeller J90 used in the ordinary vehicle turbocharger and the compressor impeller JE90 used in the low specific speed were analyzed respectively. Comparing and analyzing the differences in the meridional channel, blade angle distribution and blade load distribution of the two impellers in different applications, the design geometry rule and strategy of the electric-compressor impeller were obtained. The research results show that, optimizing the shape of the meridional channel can improve the flow and reduce the secondary flow loss, the split blade with back-swept can increase the stall margin and the operation margin, choosing a smaller exit blade angle for distribution can improve pressure gap between the suction surface and the pressure surface to enhance the function for the air, the maximum of the main blade thickness should not be too large and the thickness distribution in the middle span should be uniform. | | 查看全文查看/发表评论下载PDF阅读器 | |
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