摘要
显式有限差分方法用于求解小钝锥高超声速化学非平衡尾流的轴对称边界层方程。该方法既适用于层流也适用于湍流。应用 Goldburg 转捩准则确定转捩初始位置。详细地计算了小钝锥尺寸、飞行速度、高度对尾流转捩和光电特性的影响。从计算中得到转捩和光电特性变化的一些有用规律。对湍流亚密部分的雷达散射截面进行了规律性分析。计算结果具有实用参考价值。
An exact finite difference method for solving the axisym-metric boundary layer equations for chemical nonequilibrium wake flowis employed for both laminar and turbulent flows region.In order toascertain the initial situation of transition Goldburg rule is applied.Thedetailed numerical calculation for effect of blunt-cone scale and their fly-ing condition on fluid mechanics transition,electrical density and opticradiative characteristics of hypersonic wakes is completed.Some use-ful rules of transition and optics-electricity charactristics are foundfrom numerical simulation calculation.A qualitative analysis to radarreflective section of turbulent flow underdence is presented.
关键词
转捩
钝锥
高超声速流动
尾流辐射
transition
blunt-cone
hypersonic
wake radiation
electron density
