In general, aircraft jet engines have diffuser section(s), that reduce the velocity of the incoming air before it enters the combustion chamber.
Sample velocity profile in jet engine; image from Fundamentals of Gas turbine engines
In some cases, the the diffusers are before compressors or in the stages itself- but the end effect is reduction in velocity. Even in this reduced speed, combustion is not feasible as the the speed of burning kerosene at normal fuel-air ratios still lower; hence any fuel lit even in the pre-
diffused air stream also would be blown away.
In order to overcome this, a region of low axial velocity is created inside the combustion chamber using swirlers and recirculation. It helps that the fuel is burnt with only a portion of the air entering the combustion chamber.
Image from aeromodelbasic.blogspot.in
Basically, the airflow entering the chamber is divided into multiple parts, which enter the chamber at different times and places, so that the overall airflow has low axial velocity, while promoting recirculation. From Combustion process:
Approximately 20 per cent of the air mass flow is taken in by the snout or entry section. Immediately downstream of the snout are swirl vanes and a perforated flare, through which air passes into the primary combustion zone. The swirling air induces a flow upstream of the centre of the flame tube and promotes the desired recirculation. ...
Through the wall of the flame tube body, adjacent to the combustion zone, are a selected number of secondary holes through which a further 20 per cent of the main flow of air passes into the primary zone. The air from the swirl vanes and that from the secondary air holes interacts and creates a region of low velocity recirculation. This takes the form of a toroidal vortex, similar to a smoke ring, which has the effect of stabilizing and anchoring the flame.