内压作用下的航空轮胎爆破碎片动力响应

doi:10.7527/S1000-6893.2017.221032

Abstract

Abstract:

When the aircraft tire bursts, the velocity of the debris will be significantly increased because of the impact of internal pressure, rather than remain consistent with that of the tire in landing as specified by airworthiness standards. The model for dynamic response of bursting debris under internal pressure releasing is simulated by using dynamic grid and user defined function in Fluent, and the dynamic response program is coded by using the user defined function. Tire bursting failure is assumed to be caused by previous defects of the tire, and the dynamic process of debris can be decomposed into two phases:acceleration phase under the impact of internal pressure releasing, and deceleration motion phase under air resistance. The real-time pressure difference between both sides of debris is regarded as the only power source of the simplified physical burst model for analysis of the velocity of debris, the flow field pressure and velocity changes affected by internal pressure. The reduction model makes up the deficiency that previous mathematical models do not take into account the balance of internal and external pressure. The model can provide numerical reference for predicting the energy of debris after bursting and the energy of bursting airflow, and can thus help with the proposal of corresponding safety precautions.

Key words: aircraft tire, bursting debris, fluid-solid coupling, CFD, user defined function

CLC Number:

ZHANG Fan, ZHENG Jinyang, MA Li. Dynamic response of aircraft tire bursting debris under internal pressure[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(8): 221032-221032.

References

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Dynamic response of aircraft tire bursting debris under internal pressure

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