针对轴流式通风机的整体设计,轴向和径向间隙是气流泄漏的主要部位,对风机压头、效率以及振动噪音等都有重要影响。包括集流器、整流罩、整流体和扩散筒在内的主要通流部件对风机的整机性能也有重要影响。完成了主要间隙及通流部件的设计计算,提高了设计的可靠性,具有重要的指导意义和实际应用价值。

We investigate the aberration properties of the conformal optical system with decentered and tilted elements by vector aberration theory. By decentering and tilting the window and corrector of the system, two elements are effectively used together in a particular manner by aberration compensation to achieve off-axis imaging. A conceptual design is performed with a half-field of 2?, the F# of 4, and the wavelength ranging of 3700~4800 nm. The imaging quality can reach the optical diffraction limi