脉动燃烧是一种新型清洁和先进的燃烧技术,本文设计了一种无阀自激脉动燃烧器,以天然气为燃料,通过连续供空气、天然气的方式,实现自主激励的脉动燃烧,尾管采用蛇形结构,可增大换热面积。探究了脉动燃烧器的运行特性,分析了热负荷和过量空气系数对压力振荡和运行频率的影响规律。结果表明:过量空气系数在一定范围内,燃烧器能产生稳定的脉动燃烧；压力幅值、均值和运行频率均随热负荷的增大而增大；压力幅值随过量空气系数的增大而增大,运行频率随着过量空气系数的增大而降低；燃烧器在稳定运行时降低热负荷出现了频率跳变现象。

Pulsating combustion is a new type of clean and advanced combustion technology, a valve-less self-excited pulsating burner was designed in this paper, using natural gas as fuel, and self-excited pulsating combustion was realized by continuous supply of air and natural gas. A serpentine structure tailpipe wad adopted in order to increase the heat exchange area. The operating characteristics of the pulsating burner were explored, and the influence laws of the heat load and excess air coefficient on the pressure oscillation and operating frequency were analyzed. The results show that stable pulsating combustion can be achieved when the excess air coefficient is in a certain range. The pressure amplitude, mean pressure and operating frequency increase with the increase of thermal load; the pressure amplitude increases with the increase of excess air coefficient, and the operating frequency decreases with the increase of excess air coefficient. Phenomenon of frequency jump occurs when the thermal load is reduced in stable operation.