Huangda Zhao, Chao Yang, Zhigang Wu

DOI Number: N/A

Conference number: IFASD-2017-232

With the development of aeronautics and astronautics, research on air-breathing hypersonic vehicles (AHV) has made many achievements. The latest hypersonic vehicles usually use the integrated body / engine configuration. The introduction of propulsion system brings a lot of new challenges to AHV. In this paper, the stability of the system is analyzed by using high efficiency engineering method, and the influence of the propulsion system and thermal effect on the system is discussed emphatically. Thermal analysis is performed by using layered solution method. Unsteady aerodynamic force is calculated by local piston theory. Steady and unsteady thrusts are both included in the stability calculation. The results show that the introduction of propulsion system results in a relative large decrease in the stability margin in this particular AHV. The effect of aerodynamic heating on system is mainly reflected in the decline of structural modal frequency, which makes the system tend to be unstable. The methods described above have little computational expense and acceptable accuracy, which can offer basic understanding of an AHV model in the preliminary design phase.

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In Categories: 1. IFASD 2017, 1.Events, Aeroservoelasticity
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