Simulation method of temperature field of cylinder head of low-speed diesel engine

Abstract

The invention relates to the technical field of simulation methods of a temperature field, and discloses a simulation method of a temperature field of a cylinder head of a low-speed diesel engine. The method comprises following steps: establishing the geometric model of a cylinder head; defining material properties according to the physical property parameters of the materials of the cylinder head; carrying out mesh generation according to the defined material properties; defining boundary conditions which comprise the definitions of a displacement boundary condition and a thermal boundary condition; loading heat source and solving the temperature field with a Newton iteration method; and analyzing and evaluating the result of the temperature field. The simulation method of the temperature field of the cylinder head of the low-speed diesel engine has the advantages of being low in cost and short in period through the method of computer simulation, reduces the manufacturing quantity of a testing cylinder, and therefore can effectively save resources.

Description

Technical field [0001] The invention relates to a temperature field simulation method, in particular to a low-speed diesel engine cylinder head temperature field simulation method. Background technique [0002] The cylinder head is used to seal the top of the cylinder, and together with the top of the piston and the inner wall of the cylinder form the combustion space of the engine. During the working process of the engine, the cylinder head bears a large mechanical load (bolt tightening force, gas explosion pressure, etc.), but also has a high thermal load. It is one of the components with the worst working conditions in the engine. The reliability of the cylinder head has always been a key issue in engine design, and temperature is one of the most important factors affecting the reliability of the cylinder head. [0003] 1. At present, in the development process of cylinder head, the prediction of its temperature field is rare, and the method of trial and error is generally adop...

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Problems solved by technology

[0003] 1. At present, in the development process of the cylinder head, there are very few predictions of its temperature field, and the method of trial and error is generally adopted, which has high cost and long cycle, resulting in some unnecessary waste

There are also calculations using finite element method, but this method of finite element calculation is not systematic enough to consider factors such as the convective heat transfer coefficient between interfaces, and is not comprehensive enough

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