| 摘要 |
A fuel gas fired premixed burner (1) includes a flame strip (13) having a plurality of through slots (17). Each slot includes a relatively narrow dimension portion (31) that opens stepwise by means of a land (32) into an outlet portion (33) of a substantially constant relatively wide dimension. Under given conditions the burner flame stabilises either at the outer end of the outlet portion (33) (at a relative high heat input range) or on the lands (32) (at a relatively low heat input range) accompanied by reduction of the resonance tendency of the burner over those heat input ranges.
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