摘要
恒温热线风速仪在激波管中(来流条件T_0=290~315K,U_∞=20~60m/s)测量了四种形状不同的格栅下游湍流特性。结果表明:在相同条件下,圆柱形格栅能产生较大的湍流度,其下游湍流度随距离增加而减小,随来流雷诺数增加而增加。
The turbulent characters for four kinds of the grids downstream were measured in a shock tube, using a constant temperature anemometer at free stream conditions. U∞ = 20~60m/s; T0=290~315K. The results indicate that more intense turbulence appears downstream of the bars-grid than other grids at same free stream conditions. The turbulence decreases with increasing distance downstream from the bars-grid, and increases with increasing freestream Reynolds number.
出处
《空气动力学学报》
CSCD
北大核心
1993年第4期440-444,共5页
Acta Aerodynamica Sinica
关键词
格栅
湍流度
热线
激波管
grids, turbulence, hotwire, shock tube.