Based on a small two-stroke air-cooled aero-engine

the heat transfer of cylinder for air-cooled engine was simulated according to the theory of the fluid-solid coupled heat transfer

in combination with characteristics of heat transfer and discipline of combustion.In this theory

the heat conduction between the cylinder and cylinder liner was considered as internal condition of the system

which can make the simulation simple and convenient;as compared with the experiment result;this shows that coupled analysis is reliable about the heat transfer of the cylinder.Considering the whole working condition of the aerial vehicle

the heat transfer of the cylinder within the working altitude was simulated

thus establishing a basis for further study of the cylinder heat transfer.