Abstract

The integration of components is an important trend at present in the development of the afterburner. This study proposes a cooling structure of the guide plate to cope with the extreme thermal environment to which the flameholder is subjected. A numerical investigation is carried out to examine the effects of the cooling structure with different characteristic parameters on the cooling performance of the flameholder. The results show that the proposed cooling structure can reduce the peak temperature and improve the cooling efficiency of the flameholder while not affecting the operation of the remaining components. Furthermore, the characteristic parameters were found to influence cooling performance by changing the state of formation of and the distribution of locations of vortices in the flameholder. The optimum model was obtained by comparing the results of models with different characteristic parameters. It can reduce the peak temperature by 2.1% and increase the average efficiency of cooling by 15.3% compared with the baseline model.

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