海军航空大学学报2026，Vol.41Issue(2)：286-296,338,12.DOI:10.7682/j.issn.2097-1427.2026.02.003
U型花瓣螺纹管中超临界航空煤油换热数值分析
Numerical Analysis on Heat Transfer of Supercritical Aviation Kerosene in U-Shaped Petal-Ribbed Tubes
摘要
Abstract
In order to design high-performance air-fuel heat exchangers,the U-shaped petal-ribbed tube is proposed.Nu-merical study on heat transfer of supercritical RP-3 aviation kerosene is conducted.The distributions of wall tempera-ture and heat transfer coefficient along the flow direction are analyzed,and the non-uniform heat transfer is analyzed through the temperature,velocity,mass flow velocity,secondary flow,and turbulent kinetic energy distributions.The swirl effect generated by the coupling of ribbed structure and bend structure is investigated.The comprehensive heat transfer performance is evaluated,and the relationship between Nusselt number and secondary flow intensity is estab-lished.Results indicate that the weak secondary flow caused by ribbed swirl effect and the symmetric heat transfer in petal layers are observed in the upstream vertical section.The asymmetric secondary flow and petal-layer heat transfer appear in the bend section due to the centrifugal force,and the centrifugal force has a certain distortion impact on sec-ondary flow and heat transfer in the downstream vertical section.The centrifugal force significantly enhances the heat transfer in the bend section,with a maximum heat transfer coefficient of 35.75 kW/(m2·K).The comprehensive heat transfer coefficient is in the range of 1.0～1.7,which has a prominent enhanced heat transfer effect compared to ordinary U-shaped circular tubes.Decreasing the operating pressure and increasing the petal number all play a role in enhancing the secondary flow.关键词
U型管/花瓣螺纹结构/航空煤油/涡系结构/换热增强Key words
U-shaped tube/petal-ribbed structure/aviation kerosene/vortex structure/enhanced heat transfer分类
航空航天引用本文复制引用
王彦红,黄帅岭,白皓然,薛凯迪..U型花瓣螺纹管中超临界航空煤油换热数值分析[J].海军航空大学学报,2026,41(2):286-296,338,12.基金项目
国家自然科学基金(51876031) （51876031）
