Control method of adaptive delay wind tunnel based on total pressure characteristics

Hypersonic wind tunnel test has high requirements for the quality of flow field, and it takes a long time for the wind tunnel flow field to reach the ideal state. In order to improve the operation efficiency of conventional hypersonic wind tunnel and reduce the test cost, a simulink model of wind tunnel operation control is established, and an adaptive delay wind tunnel control method based on total pressure characteristics is proposed. The results show that the Simulink model is feasible; The adaptive delay control method can effectively reduce the fluctuation time of the total pressure in the stable section and increase the effective operation time of the wind tunnel. In addition, when the adaptive delay control method is adopted, the intervention control pressure has a reasonable range.