In this paper, on the basis of Huybrechts＇ strong-coupling polaron model, the Tokuda modified linearcombination operator method and the unitary transformation method are used to study the properties of the strongcoup...In this paper, on the basis of Huybrechts＇ strong-coupling polaron model, the Tokuda modified linearcombination operator method and the unitary transformation method are used to study the properties of the strongcoupling bound polaron considering the influence of Rashba effect, which is brought by the spin-orbit （SO） interaction, in the semiconductor triangular quantum well （TQW）. Numerical calculation on the RbCI TQW, as the example, is performed. The expressions for the effective mass of the polaron as a function of the vibration frequency, the velocity, the Coulomb bound potential and the electron areal density are derived. Numerical results show that the total effective mass of the polaron is composed of three parts. The interactions between the orbit and the spin with different directions have different effects on the effective mass of the bound polaron.展开更多
针对火箭基组合循环发动机(Rocket Based Combined Cycle,RBCC)对进气道的大空域、宽速域、高性能设计需求,在相同约束条件下设计了矩形截面类咽式进气道和典型侧压式进气道,采用数值仿真的方法对两种进气道的流动特征、速度特性、攻角...针对火箭基组合循环发动机(Rocket Based Combined Cycle,RBCC)对进气道的大空域、宽速域、高性能设计需求,在相同约束条件下设计了矩形截面类咽式进气道和典型侧压式进气道,采用数值仿真的方法对两种进气道的流动特征、速度特性、攻角特性和阻力特性进行了对比研究。结果表明两种进气道内均存在扫掠激波-边界层相互干扰,类咽式进气道流场特征呈现出左右结构而侧压式进气道为上下结构;在不同来流条件下,类咽式进气道在流量捕获能力和降低溢流阻力上均有明显优势。可为宽范围高性能进气道的设计提供一定参考。展开更多
基金National Natural Science Foundation of China under Grant No.10347004
文摘In this paper, on the basis of Huybrechts＇ strong-coupling polaron model, the Tokuda modified linearcombination operator method and the unitary transformation method are used to study the properties of the strongcoupling bound polaron considering the influence of Rashba effect, which is brought by the spin-orbit （SO） interaction, in the semiconductor triangular quantum well （TQW）. Numerical calculation on the RbCI TQW, as the example, is performed. The expressions for the effective mass of the polaron as a function of the vibration frequency, the velocity, the Coulomb bound potential and the electron areal density are derived. Numerical results show that the total effective mass of the polaron is composed of three parts. The interactions between the orbit and the spin with different directions have different effects on the effective mass of the bound polaron.
文摘针对火箭基组合循环发动机(Rocket Based Combined Cycle,RBCC)对进气道的大空域、宽速域、高性能设计需求,在相同约束条件下设计了矩形截面类咽式进气道和典型侧压式进气道,采用数值仿真的方法对两种进气道的流动特征、速度特性、攻角特性和阻力特性进行了对比研究。结果表明两种进气道内均存在扫掠激波-边界层相互干扰,类咽式进气道流场特征呈现出左右结构而侧压式进气道为上下结构;在不同来流条件下,类咽式进气道在流量捕获能力和降低溢流阻力上均有明显优势。可为宽范围高性能进气道的设计提供一定参考。
