喷雾撞壁过程中液膜形成与演化研究进展

Internal combustion engines are confronted with great challenge of global carbon reduction. Their main development directions will be the green and low-carbon, energy conservation and emission reduction, as well as high-power density. With the application of high-pressure direct injection, regardless of whether traditional fuels or green and low-carbon or zero-carbon fuels are used in the future, the wet wall phenomenon caused by direct injection in the cylinder will be inevitable. This paper provides a comprehensive review of published literatures concerning the quantitative measurement methods for fuel film, film formation mechanism and computational simulation model, etc. This review is concluded with recommendations concerning future work that is needed to address attention on the green methanol direct injection impingement problem in internal combustion engines and characteristics of the wet wall. Besides, research on the construction of fuel film models for methanol fuel engines, simulation calibration and high-precision calculation, as well as the fuel film reduction strategies, are all key and difficult issues in the future of engineering thermos-physics.