The mesoscale circulation determines basic air flow patterns in this area , which is typical in spring - summer season and in calm weather of autumn - winter season 中尺度环流是该地区低层大气流动的基本模态,春夏季和秋冬季弱系统条件下的区域流动大体按这种模态演变。
Furthermore , with the fourier series technique , the disturbance is discomposed into predominant mode and high frequency harmonics , and the nonlinear stability of the nonparallel boundary layer is studied 采用fourier级数的方法把扰动波分解为基本模态和高频谐波模态,导出非平行非线性抛物化稳定性方程。
With the fourier series technique , the disturbance is discomposed into predominant mode and high frequency harmonics . the nonlinear stability of three - dimensional disturbances for the blasius boundary layers is studied 借助fourier级数的方法将扰动波分解为基本模态和高频模态,研究了三维扰动的非线性边界层稳定性问题。
To study the acoustic unsteady combustion of srm , built the acoustic model of chamber . deduced the little amplitude sound wave 3d equation , used the finite volume discrete method to simulate . got the vibration model of three kinds of chamber 为研究固体火箭发动机声不稳定燃烧特性,建立了燃烧室内声学特性分析的物理数学模型,推导了小振幅声波三维波动方程,采用有限体积离散方法进行仿真,得到圆柱型、四片翼柱彤和五片翼柱型药柱三种燃烧室形状声学振动基本模态