Comparison of Schlieren and Laser Scattering Methods in Wall-Film Model Validation

In order to research the differences between the schlieren and laser scattering methods and validate the wall-film model, the wall-film of intake-port-injection gasoline engine is studied by these two methods. The comparison results show that, the schlieren and laser scattering method all distinctly indicate the spray and wall-film at the beginning of the wall-film because of nearly no fuel evaporation; comparing the schlieren way the laser scattering can easily present one cross-section of the wall-film using the sheet laser and can discover the principle of impingement point, which can present more information for validation of intake-port wall-film model.