通过实验研究离心风机蜗壳扩张角对风机噪声及效率的影响。
By experiment, for the effect of fan expending Angle to noise and efficiency study.
扩张角的增加可提高速度环量，但是流动混合损失增加，总压恢复系数减小。
The increase of lobe diffusion angle results in the increase of velocity circulation at the lobe exit section, but it raises the mixing loss and lowers the pressure recovery coefficient.
本实用新型具有结构简单、变更扩张角度方便、扣齿固定牢固的的优点，且使用安全方便。
The utility model has the advantages of simple structure and firm buckling tooth fixation, and the dilating Angle is convenient to displace with safe usage.
该涡轮导向器的一个显著特点是由于结构上的要求，静叶前子午流道在上端壁具有较大的扩张角。
A feature of this guide vane was existence of a long inlet duct with big meridional divergent angle in order to fulfill the requirements of the structure.
试验研究了主、径向涡流器旋流数、面积比、套筒扩张角等参数对双旋流进气装置冷态流场的影响。
The effects of swirl number of primary swirler and radial swirler, area ratio and sleeve divergence angle on the cold flow field of double swirl air intake were investigated.
给出了一种亚音速方转圆扩压器的设计方法，并对中心线形状、型面变化规律和扩张角等进行了选择和说明。
For matching turbine work condition, designed a diffuser that transformed square to round, chose Central Line and shape changed method, defined diffuser expanding Angle.
进入排气管催化转换器载体的流体分布越均匀，催化转换的效果越好，催化转换器扩张角是影响进入催化转换器载体流体分布是否均匀的关键因素。
The more evenly distributed the fluid entering the carrier of catalytic converter in the exhaust pipe, the better results of catalysis and transformation can be got.
进入排气管催化转换器载体的流体分布越均匀，催化转换的效果越好，催化转换器扩张角是影响进入催化转换器载体流体分布是否均匀的关键因素。
The more evenly distributed the fluid entering the carrier of catalytic converter in the exhaust pipe, the better results of catalysis and transformation can be got.
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