دراسة تأثير دينامية الهواء على مقاطع مختلفة لفوهة محارق

Abstract

Four type of burners of different rim shapes were made and tested.The rims were of plane surface, plane surface insulated from all side by nitrogen gas, out sidesharp edge and inside sharp edge. Study of the effect of the ambient conditions on thecontinuity and stability was carried out, in which open tip smooth flame, blow out , flash back, close tip smooth flame , unsuitability polyhedral were carefully examined.Design and installation of a whole combustion system, including nitrogen gas supply wasmade.The results show that the burner with plane surface rim insulated by most stable one. This isbecause the idle gas separates the front of the flame from the ambient air, reducing theaerodynamic effect on the flame and eliminating the polyhedral flame. The burner of outsidesharp edge has the maximum dead space, producing minimum flash back, dislike the burnerwith inside sharp edge, which is the least stable due to rotation of the flame.