推力矢量对飞机大迎角动态气动特性的影响

doi:10.7527/S1000-6893.2017.21648

Abstract

Abstract: The influence of thrust vector on aerodynamic characteristics at high angles of attack is an important part of improving the dynamic performance of aircraft. The high maneuverability of the new generation fighter also makes the fusion control research of aerodynamic characteristics and thrust vector more and more important. In the ∅3.2 m low speed wind tunnel of China Aerodynamics Research and Development Center, a dynamic test technique for thrust vector at large angle of attack is developed by means of a jet simulator and a ventilation dynamic test device. Experimental research on high angle of attack pitching oscillation characteristics with different reduction frequencies, pressure drop ratios and nozzle deflection angles is carried out. The results show that compared with the non-jet test, the dynamic characteristics of the model with the jet flow changing regularly along with the change of the pressure drop ratio and the nozzle deflection angle. The hysteresis curve area formed by force and moment coefficients increases with the increase of the pressure drop ratio and the deflection angle. The influence of the reduced frequency on the dynamic characteristics of the model is less than that without the jet flow. In general, thrust vector does not change the basic rules of dynamic characteristics at high angle of attack, but with the change of angle and force of thrust vector, thrust vector also regularly increases the change magnitude of the dynamic aerodynamic force and moment.

Key words: thrust vector, high angle of attack, aerodynamic characteristics, low speed wind tunnel, jet simulation

CLC Number:

V211.73

TANG Wei, HUANG Yong, FU Hao. Effect of thrust vector on dynamic aerodynamic characteristics of aircraft at high angle of attack[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(4): 121648-121648.

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Effect of thrust vector on dynamic aerodynamic characteristics of aircraft at high angle of attack

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