Prediction of Characteristics of Two Dimensional Turbulent Wakes Under the Influence of Streamline Curvature and Zero, Positive, and Negative Pressure Gradients

摘要

The development of a wake flow downstream of a cylindrical rod within a curved channel under turbomachinery flow conditions (streamline curvature, and zero, positive and negative pressure gradients) has been investigated theoretically. The theoretical framework is based on the equations of continuity and motion that are transformed into an orthogonal curvilinear coordinate system. These equations describing the wake phenomenon are solved for mean velocities, and Reynolds normal and shear stresses. The theory also describes the straight wake as a special case, for which the radius of curvature approaches infinity. To demonstrate its general validity, the theory has been compared with experimental measurements made available from the Turbomachinery Performance Laboratory at Texas A&M University as well as from the current literature.