摘要：In a centrifugal compressor, the leakage flow through the tip clearance generates the tip leakage vortex by the interaction with the main flow, and consequently makes the flow in the impeller passage more complex by the interaction with the passage vortex. In addition, the tip leakage vortex interacts with the shock wave on the suction surface near the blade tip in the transonic centrifugal compressor impeller. Therefore, the detailed examination for the influence of the tip leakage vortex becomes seriously important to improve the aerodynamic performance especially for the transonic centrifugal compressor. In this study, the flows in the transonic centrifugal compressor with and without the tip clearance at the design condition were analyzed numerically by using the commercial CFD code. The computed results revealed that the tip leakage vortex induced by the high loading at the blade tip around the leading edge affected the loss generation by the reduction or the suppression of the shock wave on the suction surface of the blade.

摘要：In order to investigate the design method for a micro centrifugal compressor,which is the most important component of an ultra micro gas turbine,two types of centrifugal impeller with 2-dimensional blade were designed,manufactured and *** impellers have different shapes of hub on the meridional plane with each ***,these types of impeller were made for the 5 times and the 6 times size of the final target centrifugal impeller with the outer diameter of 4mm in order to assess the similitude for the *** comparison among the performance characteristics of the impellers revealed the influence of the meridional configuration on the performance and the similitude of the compressors.

摘要：这份报纸报导巨浪的试验性、理论的学习发生在原型一台极端微离心的压缩机。作为第一步， 10 次缩放有 40 公里的一台极端微离心的压缩机的模型外部直径被设计并且生产。为有 B 参数的几不同价值的巨浪的短暂行为的详细试验性的调查被执行。试验性的结果在巨浪期间与非线性的 lumped 参数理论获得以便为微离心的压缩机验证理论巨浪模型的有效性的那些相比。作为结果，巨浪的相当不同的行为在实验并且在分析为 B 的不同价值出现了。关键词微离心的压缩机 - 澎湃 - lumped 参数模型 CLC 数字 TK474.

摘要：以便建立设计一台极端微离心的压缩机的方法论，是一个极端微煤气的汽轮机单位的最重要的部件，最后的目标压缩机的 10 次尺寸(impeller 外部直径 40 公里，改正的旋转速度 220,000 r/min ) 被设计。为精简要解决的问题被检验，当第一由于它的生产率当模特儿， 2-dimensional impeller 被选择。常规 1D 预言方法和 CFD 被使用。建原型的压缩机被以 110,000 r/min 的减少的速度使用冷空气测试。对 10 次模型，后面期末考试的 5 次尺寸充分让 3-dimensional 塑造的目标模型(impeller 外部直径 20mm，改正的旋转速度 500,000 r/min ) 被以 250,000 r/min 的减少的速度使用热气体设计并且测试。关键词离心的压缩机 - 表演特征 - 3-dimensional impeller CLC 数字 TK474.