Study On Simulation Of 3-D Non-steady Heat Transter Of Coupling System In Combustion Chamber

In this paper, 3-D numerical analysis for heat transfer of Coupling system within combustion chamber in internal combustion engine is studied .Firstly, the discrete formulae of 3-D transient heat conduction and non-steady heat conduction under operating conditions of the coupling moving piston assembly-lubricant film-liner system are developed. Secondly, the transient heat conduction of 3-D moving piston assembly-liner coupling system for LJ377MV gasoline engine is studied. As a result, the 3-D temperature field of the system during transient heat conduction process is obtained. The result has revealed the top of the piston of LJ377MV gasoline engine endures acute dynamic thermodynamic load. Thirdly, non-steady heat conduction process of 3-D moving piston assembly-liner coupling system for LJ377MV gasoline engine is studied, as a result, the 3-D temperature field of the system on this condition is obtained. The result has revealed, the temperature field has been effected greatly by the 3-D structure of the coupling system. Then, the storage of sparse matrix grounded on two-dimensional chain table data structure as well as means of seeking answers of corresponding linear equations is applied in calculating of heat transformation in the Coupling system within combustion chamber. With ameliorating the storage structure of two-dimensional chain table data structure, picking up major element following the diagonal of the matrix, calculation of the sparse matrix which is applied in finite element analysis is more effective.The heat conduction process of Coupling system in LJ377MV has been analyzed with the developed software and the reasonable simulation results of the cyclic transient and non-steady heat transfer under transient operating conditions were obtained. The result provide a foundation method of then improvement and optimum design for the engine.