Burner Technology Bulletin: Control of Combustion Noise from Small Gas Burners. A Reference Guide for Gas Burner Designers

摘要

The bulletin summarizes key research results on ways to suppress noise that is caused by combustion roar and combustion-driven oscillations in small gas burners (up to about 100,000 Btu/hr input per burner). The scope includes conventional steady-state burners used in various residential and small commercial appliances, such as cooking equipment, water heaters, furnaces, and boilers. Noise problems are classified as being either combustion roar or combustion-driven oscillations. Techniques for suppressing combustion roar include reducing flow velocity, input rate, primary aeration, and turbulent stream fluctuations in ports; using resonators as mufflers; using dissipative mufflers; considering furnace shape; superimposing noise from internal sources and reducing turbulence level before the flame. Possible remedies for combustion-driven oscillations vary depending on types of flames (turbulent or nonturbulent premixed or diffusion flames).