Fig. 1. Schematic of differential-pressure fiber-optic airflow sensing system based on white light interferometric technology

Fig. 2. Experimental setup for airflow velocity measurement in a wind tunnel

Fig. 3. Real-time response of differential-pressure fiber-optic airflow sensing system in the range of 3.97--37.84 m·s^-1. (a) Changes of the FP cavity length of sensing probe with velocity; (b) real-time velocity calculated by Eq. (1); (c) comparison between the measured airflow velocity by the proposed system and the reference velocity

Fig. 4. Test process of flow drag around a circular cylinder in a wind tunnel. (a) Measurement of differential-pressure in outer flow; (b) measurement of differential-pressure around a circular cylinder

Fig. 5. Variations of the FP cavity length and the differential-pressure in the airflow field. (a) In the outer flow; (b) around the circular cylinder

Fig. 6. Distribution of pressure coefficient around the circular cylinder