Abstract: To enhance the flame array performance of gas water heaters, the numerical simulation method was used to simulate the internal flow field and concentration field within the flame array. The influence of flame array orifice depth was investigated. The analysis indicates that increasing the orifice depth effectively resolves the issue of airflow deflection at the flame ports, alters the magnitude and uniformity of airflow velocity at the orifice outlets, yet has minimal impact on the uniformity of methane concentration at the flame port exits. This provides valuable reference for the design of flame arrays in gas water heaters.

Key words: Gas water heater, Flame Array, Numerical simulation