Analysis of the Near-Wall Flow in a Turbine Cascade by Splat Visualization

Abstract

Turbines are essential components of jet planes and power plants. Therefore, their efficiency and service life are of central engineering interest. In the case of jet planes or thermal power plants, the heating of the turbines due to the hot gas flow is critical. Besides effective cooling, it is a major goal of engineers to minimize heat transfer between gas flow and turbine by design. Since it is known that splat events have a substantial impact on the heat transfer between flow and immersed surfaces, we adapt a splat detection and visualization method to a turbine cascade simulation in this case study. Because splat events are small phenomena, we use a direct numerical simulation resolving the turbulence in the flow as the base of our analysis. The outcome shows promising insights into splat formation and its relation to vortex structures. This may lead to better turbine design in the future.

Screen‐space Streamline Seeding Method for Visualizing Unsteady Flow in Augmented Reality

“…Precomputing the entropy can be another solution to this problem, but it is only applicable to steady flow. Methods that do not use entropy resort to different metrics for streamline seeding, such as a balanced line hierarchy 25 or extracted flow topology 26–28 …”