Measurements of the Dynamic Performance of the Main Drive Fan of the RAE 5 Metre Pressurised Low Speed Wind Tunnel

摘要

Tests were carried out to monitor and evaluate the performance of the blades in the main drive fan of the 5m pressurised low speed wind tunnel. A technique was developed for in situ maintenance checking to detect the onset of internal cracking or delaminarisation in the glass reinforced plastic blades. Three of the ten fan blades were instrumented with strain gauges to monitor the dynamic performance of the fan under different loadings resulting from combinations of fan speed and tunnel pressurisation. The effect of a model was also investigated, with the model both stalled and unstalled. (Author)