海军航空大学学报2025，Vol.40Issue(5)：649-657,9.DOI:10.7682/j.issn.2097-1427.2025.05.001
高压圆盘气体轴承混合计算域共轭传热分析
Conjugate Heat Transfer Analysis of High-Pressure Aerostatic Thrust Bearing in Mixed Computational Domain
摘要
Abstract
To investigate the complex conjugate heat transfer characteristics in high-pressure aerostatic thrust bearings,a two-dimensional axisymmetric model of the mixed-domain flow field,including both the internal and external regions surrounding the solid domain,is established.Conjugate heat transfer numerical simulations are conducted,incorporating the effects of subsonic-to-supersonic gas flow within the bearing clearance and external entrainment flow under high supply pressure.The results indicate that,compared to the conventional natural convection assumption,the mixed-domain model provides more accurate predictions.The average convective heat transfer coefficients of the upper and lower disk end faces reach 133.95 W/(m²·K)and 102.31 W/(m²·K),respectively,while those of the upper and lower outer cylindrical surfaces are 225 W/(m²·K)and 205 W/(m²·K),representing a 10～22 fold increase over the natural convection assumption(10 W/(m²·K)).The peak heat flux at the conjugate surface in the clearance flow channel is re-duced by 38％,demonstrating the significant regulatory effect of entrainment flow on disk heat transfer.Energy conser-vation verification confirmed that the net heat flux of the disk is less than 0.87 W(relative error<1.12％),meeting engi-neering accuracy requirements and providing theoretical support for the optimization of high-pressure gas bearings.关键词
高压圆盘气体轴承/共轭传热/混合域/数值模拟/卷吸气流Key words
high-pressure aerostatic thrust bearing/conjugate heat transfer/mixed-domain/numerical simulation/en-trainment flow分类
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郭良斌,宋红亮..高压圆盘气体轴承混合计算域共轭传热分析[J].海军航空大学学报,2025,40(5):649-657,9.基金项目
国家自然科学基金(51475341) （51475341）
