双旋流气体燃烧器冷态流动特性的实验研究

1引言旋流燃烧器具有稳定、高效、清洁燃烧的特点,而且结构简单,具有良好的负荷适应能力,因此从20世纪70年代起受到了越来越多的制造商及发电企业的重视和青睐[1]。国内外很多学者利用多种测量仪器和实验方法对各种类型旋流燃烧器的空气动力场进行了大量的研究:Dixon等人利用五

An Experimental Study of Cold-state Flow Characteristics of Dual-swirl Gas Burners

An experimental study was conducted of the cold-state flow field of a dual swirl gas burner model through the use of an IFA300 type two-dimensional constant-temperature hot-wire anemometer system.The transient velocity distribution and turbulent flow intensity at different locations of the flow field were measured.The research results show that the said burner can organize a rational aerodynamic field and have a comparatively good adaptability to load changes.When the flow fields in different diffuser outlet structures are compared,it can be found that installing a convergent-divergent diffuser outlet of certain structure can better contribute to a stable,effective and clean combustion of fuel.A rotating jet flow assuming different directions can be detrimental to a uniform mixing of fuel and air and greatly reduce the length of the return flow zone.Such a structure should be avoided during the design of burners.