Weibull分布描述直径生长及其合理性研究

The rationality of constructing diamster distribution model with Weibull function. in term of the weibull function characters, especially the surface of Weibull, were researched. The method to establish diamster distribution model ac cording to PRM also was provided.

小口径喷嘴冲击射流噪声锯齿特性及机理研究

测量了 3毫米口径轴对称收缩喷嘴射流冲击大平板产生的噪声随冲击距离变化的特性。发现远场噪声随冲击距离的变化呈锯齿状 ,射流上游的噪声频谱上有粗缓、跨较宽频带的尖峰。根据不同唇厚喷嘴的实验对比 ,判断这些现象跟反馈有关 ,称为反馈噪声 ,而且正是反馈噪声与湍流噪声的相互作用 。