A Study of the Development of Steady and Periodic Unsteady Turbulent Wakes Through Curved Channels at Positive, Zero, and Negative Streamwise Pressure Gradients, Part Ⅰ

摘要

The turbo machinery wake flow development is largely influenced by streamline curvature and stream wise pressure gradient. The objective of this investigation is to study the development of the wake under the influence of streamline curvature and stream wise pressure gradient. The experimental investigation is earned out in two phases. The first phase involves the study of the wake behind a stationary circular cylinder (steady wake) in curved channels at positive, zero, and negative streamwise pressure gradients. The mean velocity and Reynolds stress components are measured using a X-hot-film probe. The measured quantities obtained in probe coordinates are transformed to a curvilinear coordinate system along the wake centerline and are presented in similarity coordinates.