An Engineering Method for Asphalt Foaming Modeling Integrating Gas-liquid Phase Change Process

摘要

The asphalt foaming is a nonlinear kinetics process under high temperature and high pressure with multi-phase medium and multi-field condition. It includes stages like transient contact, heat exchange, phase change and bubble generating process. In order to quantitatively describe the relationship between the asphalt foamability and the asphalt foaming equipment physical parameters, the engineering method for asphalt foaming modeling integrating gas-liquid phase change process is created. Meanwhile, the asphalt foaming dynamic model for design parameters and coupled field distribution, which can express multiphase contact, heat exchange and further phase change, is built. Compared to the old non-phase change model, the new model has a stronger correlation to the asphalt foaming experimental results. Therefore, the study is significant for the redesign of the asphalt foaming equipment.