论文部分内容阅读
Aerodynmic losses and local heat transfer coefficients on the streamlined surface depend on the length of Iaminar, transition and turbulent boundary layer on this surface. In real conditions many factors influence on the development of boundary layer. Therefore the investigations of laminar-turbulent transition were carried out at combined action of longitudinal pressure gradient, Reynolds number, external flow turbulence intensity, temperature factor, curvature and roughness of streamlined surface. The regularities of boundary layer development and its characteristics in the laminar and transition zones were determined.
Aerodynmic losses and local heat transfer coefficients on the streamlined surface depend on the length of Iaminar, transition and turbulent boundary layer on this surface. Thus the investigations of laminar-turbulent transition were carried out of combined action of longitudinal pressure gradient, Reynolds number, external flow turbulence intensity, temperature factor, curvature and roughness of streamlined surface. The regularities of boundary layer development and its characteristics in the laminar and transition zones were determined.