三维可视化解释技术在DF气田的应用

三维可视化解释技术在DF气田气藏描述中的应用效果表明 ,以方差体与相干体技术为基础 ,利用层位自动追踪技术和层面可视化及沿层精细雕刻等三维可视化解释新方法 ,不仅能够从三维空间整体把握该气田气藏的构造和沉积特征 ,避免地震解释的随意性 ,而且可以提高地震解释的精度和效率 ,使地震信息的利用率大大提高。

Boundary Layer Development on a Concave Surface： Flow Visualization and Hot Wire Velocity Measurements

Gortler vortices are key issues in the design of gas turbine blades. The present study deals with flow visualization over concave surface for gas turbine applications. The aim is to comprehend qualitatively the flow trends, particularly the Gortler vortices formation and development. Gortler vortices have the shape of mushroom-like vortices regularly spaced at 25 mm. These vortices grow and increase in strength more rapidly along the surface in the case of the same grid of turbulence applied to the measuring section. The curvature radius of the studied blade is 0.5 m and the stream turbulence intensity level is 2.6%. The velocity field is measured by hot wire anemometer in the streamwise direction. The velocity profile is found to be highly distorted by the momentum transfer associated with Gortler vortices. The results are compared to Blasius flow and to literature data for a blade with curvature radius equal to 2 m.