压气机叶栅附面层的计算

本文用积分法对三种压气机叶栅进行了计算,具体结果如下: 文献[1]中的压气机叶栅 图1表示了用[1]给出的压力分布计算的上表面附面层厚度,还表示了[1]中用Truckenbrodt方法计算的结果。可以看出,用Green方法计算的附面层厚度δ和动量厚度θ与试验值比较符合。两种方法得到的位移厚度相差不多,     

Synchronization in multilayer networks through different coupling mechanisms

In recent years, most studies of complex networks have focused on a single network and ignored the interaction of multiple networks, much less the coupling mechanisms between multiplex networks. In this paper we investigate synchronization phenomena in multilayer networks with nonidentical topological structures based on three specific coupling mechanisms:assortative, disassortative, and anti-assortative couplings. We find rich and complex synchronous dynamic phenomena in coupled networks. We also study the behavior of effective frequencies for layers I and II to understand the underlying microscopic dynamics occurring under the three different coupling mechanisms. In particular, the coupling mechanisms proposed here have strong robustness and effectiveness and can produce abundant synchronization phenomena in coupled networks.     

Mg-10Gd-2Y-0.6Zr合金热压缩变形与其微观组织

采用热压缩模拟试验,对Mg-10Gd-2Y-0.6Zr镁合金在350～450℃,变形程度为40%,变形速率在0.001～0.5s-1条件下的热压缩变形规律进行了研究,对变形后的微观组织进行了金相分析,对显微组织中的第二相进行了扫描能谱成分分析,对变形后试样的硬度进行了测试,根据热加工动态回复再结晶的特点和稀土合金相的作用,分析了该合金的微观组织结构和变形行为.结果表明:热压缩变形温度和速率对合金硬度值总的影响不大,但在相同温度下,有速率越大硬度越大的趋势;该合金在350℃,400℃时变形速率为0.1 s-1时晶粒异常粗大,在400℃变形速率大于0.5 s-1或变形温度450℃,变形速率为O.1 s -1下进行热压缩,该合金可以得到组织结构均匀和热塑性成型良好的匹配.