扩张角 meaning in Chinese
angle of flare
angle of widening
divergence angle
flare angle
Examples
- A mathematical model of flows in the substrate was established using the equivalent continuum approach , and multi - dimensional numerical simulation of the steady flows in the catalytic converters was performed . simulation results show that the separation and vortex , which cause the pressure loss and the velocity non - uniformity at the front of the first substrate , are generated near the wall of the conical pipe . in addition , the larger the inlet cones angle the more the pressure loss and maldistribution in converters , however , when the angle enlarges enough the pressure loss would be decrease
结果显示气流在扩张圆锥管壁附近出现分离产生较强的扰动，造成局部流动损失和载体前气流速度沿径向分布不均匀；入口扩张管结构对催化器的流动特性有很大影响，但并非扩张角越大，催化器流速武汉理工大学硕士学位论文分布的不均匀性和压力损失也增大，而是存在着一个最佳角度，但当扩张角增大到一定程度以后，扩张角对流速分布和压力损失的影响变小。 - The reason that the noise is lower with inclining tongue is : 1 ) both the radius of the tongue and the gap between the tongue and the blade are changed across the wideth ; 2 ) the phase angle between blade and the tongue is changed across the wideth , therefore the peak value of the noise do not appear at the same time , so the peak value of the noise with inclining tongue is much lower than the straight one . the influence of the expanded angle of the shell of the fan on the noise was invested experimentally , and the optimal angle was got
倾斜蜗舌降噪的主要原因是：一是改变了从气流入口侧到风机轮盘的蜗舌间隙和蜗舌半径；二是改变了叶轮与蜗舌非定常相互作用的相位差，使其产生噪声也有相位差，迭加的结果进一步降低了噪声。另外，试验研究了不同蜗壳扩张角对风机噪声及效率的影响规律，蜗壳扩张角选择当否，对效率和噪声影响较大。