The invention discloses a low-
pollution combustion chamber with a main
combustion stage adopting single-layer pre-film radial two-grade reverse
rotational flow. The low-
pollution combustion chamber adopts a single annular cavity structure, and comprises a diffuser, a combustion outdoor box, a combustion indoor box, a
flame cylinder outer wall, a
flame cylinder inner wall and a
combustion chamber head part; the
combustion chamber adopts a classification combustion scheme; the combustion head part is divided into a pre-combustion stage and the main combustion stage; the pre-combustion stage adopts a mode of combining
rotational flow-stable
diffusion combustion with
rotational flow premixing combustion; the combustion mode reduces the
pollutant discharge under small working conditions when not influencing stable combustion; and the main combustion stage adopts a premixing pre-
evaporation combustion mode to be in favor of uniform combustion. The
combustion chamber adopts a center
classification structure; the pre-combustion stage is simple in structure; the main combustion grade adopts a two-grade reverse
cyclone distributed in the radial direction; and two parts of reverse rotational flows shear an
oil film, so that the atomization effect is greatly improved, the atomization of fuel of the main combustion stage and the mixing with air are enhanced, the premixing pre-
evaporation of the fuel is reinforced, and the
pollution discharge of whole landing and taking-off circulation of an aero-engine combustion chamber is further reduced.