Impact analysis of cooling method of radial flameholder on wall temperature and flow field by numerical simulation

In order to find a good cooling method of radial flameholder, the impact of impingement cooling, impingement effusion cooling, effusion hole inclination and number of effusion holes on the cooling of radial flameholder and the flow field behind the radial flameholder are analyzed. The results show that with designed amount of cooling air, impingement cooling can meet the basic usage requirements while the impingement effusion cooling works better. However, the impingement effusion cooling has a serious effect on the rear flow field of the radial flameholder. The influence of cooling air on the flow field could be effectively reduced by reducing the effusion hole inclination and number of effusion holes.