Fig. 1. Schematic of airflow velocity measurement system

Fig. 2. Pressure distributions of flow field around airflow sensor holder under different forebody shapes. (a) Circle with radius of D; (b) ellipses with semi-major and semi-minor axes of 3D and D, respectively; (c) ellipses with semi-major and semi-minor axes of 2D and D, respectively; (d) pressure curves of airflow sensor holders with three different forebody shapes at different distances from their front surfaces

Fig. 3. Fitting surfaces and errors of two F-P sensors. (a) Fitting surface of stagnation sensor; (b) fitting surface of reference sensor; (c) pressure absolute error of stagnation sensor; (d) temperature absolute error of reference sensor

Fig. 4. Peak positions of two sensors at different airflow velocities. (a) 93 m/s; (b) 54.5 m/s

Fig. 5. Measurement results of airflow velocity. (a) Relationship between airflow velocity and pressure difference; (b) error of airflow velocity

Fig. 6. Flowchart of airflow velocity demodulation