A comparison of flow visualisation and wall pressure measurements for a jet impinging on a plane surface

Several studies of jets impinging on a plane surface have already been made. This paper suggests a new approach to studying impingements of jets. Comparisons have been made between visualisation results and wall pressure measurements. It is shown that only one of these two techniques is sufficient for characterising the flow nature near the wall. Visualisations can be sufficient for determining the location of wall pressure maxima and minima. Detachments and reattachments of the flow are thus located, and the main characteristics of a jet impinging on a plane wall can be shown by simpler experiments such as the spreading over method.