Abstract: In order to solve the problem of the flame swing of the burner in the gas water heater, the numerical simulation method was used to simulate the internal flow field of the fire. Combined with the flame shape analysis obtained from the combustion experiment, the cause of the flame swing is obtained, that is, there is a vortex at the lower end of the fire hole. At the same time, numerical simulation is used to verify the feasibility of solving the flame swing problem by optimizing the structure of the airflow channel between the shunt slot and the fire hole, which provides a reference for the design of the burner in the gas water heater.

Key words: Gas water heater, Burner element, Numerical simulation, Flame swing