锥形轴承腔油气两相流动与换热数值研究

The two-phase flow and heat transfer on the wall of bearing chamber are the basis of the fine design of the bearing chamber and are closely related to the structure of the bearing chamber wall. Aiming at the two-phase flow and heat transfer of a bearing chamber wall with typical tapered structure，based on the VOF two-phase flow model，through a comparison with the cylindrical bearing chamber and a parametric analysis，the effects of the tapered structure on heat transfer were obtained. This paper uses the non-dimensional analysis method to establish the convective heat transfer criterion formula that is suitable for the tapered bearing chamber in the range of common operating conditions. Studies have shown that the heat transfer of the tapered bearing chamber wall is slightly less than that of the cylindrical cavity. The heat transfer rate of the tapered chamber wall increases with the increase of the engine main shaft rotating speed，linearly increases with the increase of the oil supply，and decreases first and then increases with the increase of the sealed air flow.