Verfahren zum Sichtbarmachen von Gasströmungen

Abstract

Techniques for the visualization of gas flow. Flow processes with separation on surfaces of any shape can be calculated only in isolated cases. Thus, owing to the considerable technical and economic significance of flow processes particular importance attaches to techniques for their visualization as well as for their measurement. The complex variety of flow processes on flow past or through objects requires simple fast methods usable without any great amount of know‐how. Most flow visualization techniques are based on basic process engineering processes. These techniques are surveyed, as they apply to incompressible gas flow. They can be divided into three categories, depending upon whether the entire flow field, the flow adjacent to the boundary layer, or the effects of flow processes on a solid wall (wall effects) are to be visualized. Significant advances have been made in techniques for the visualization of wall effects, which are reported here.