D-342 超音速流中における縦渦を用いた混合促進に関する研究

概要

論文の詳細を見る
Growth of spanwise disturbances existing in a compressible curved shear layer was investigated by linear stability analysis. Like Gortler vortices in boundary layer along a convex curved wall, the fact was confirmed that a curved shear layer is unstable to spanwise disturbances when velocity of outer fluid is larger than that of inner one and these disturbances form streamwise vortices. Within the scope of liner theory, there are no effects of compressibility on growth of spanwise disturbances in contrast to the case of streamwise disturbances. In other words, growth rates of spanwise disturbances relatively exceed those of streamwise ones when effect of compressibility is large. In addition, a large curvature gives large growth rates of spanwise disturbances. Further study able to treat nonlinear effects is necessary to investigate details of streamwise vortices formed in a supersonic curved shear layer.
日本流体力学会の論文
2003-07-28