大连理工大学学报Issue(6)：816-823,8.
浮升力对水平管内超临界航空煤油传热影响数值研究
Numerical study of effect of buoyancy on heat transfer of supercritical aviation kerosene in a horizontal tube
王彦红 1李素芬 1东明1
作者信息
- 1. 大连理工大学能源与动力学院，辽宁大连 116024
- 折叠
摘要
Abstract
Numerical simulations on flow and heat transfer characteristics of RP-3 aviation kerosene in a horizontal tube at supercritical pressure were carried out .The inner diameter of the tube is 10 mm ,and the length is 8 000 mm .Influence of violent variation of thermo-physical properties in the pseudo-critical region on heat transfer in the horizontal tube was investigated .Numerical method was validated by comparing numerical results with experimental data .The entire heat transfer process was divided into four stages according to the fluid states of near-wall region .Density distribution along perpendicular bisector at different tube cross-sections and secondary flow velocities were used to analyze the evolution characteristics of the secondary flow , so the abnormal mechanism of wall temperature distribution was well explained .The parameter of cross-section relative transverse kinetic energy is introduced to qualitatively describe the intensity of the secondary flow . Effects of mass velocity and heat flux on the secondary flow and wall temperature distributions are discussed .Finally , the applicability of several criteria ,used for the buoyancy effect on the convective heat transfer of supercritical aviation kerosene in the horizontal tube is analyzed .T he computational results show that the heterogeneous heat transfer mechanism of RP-3 aviation kerosene at supercritical pressure in the horizontal tube can be well explained by the variation characteristics of the secondary flow .关键词
浮升力/超临界压力/航空煤油/传热/二次流Key words
buoyancy/supercritical pressure/aviation kerosene/heat transfer/secondary flow分类
航空航天引用本文复制引用
王彦红,李素芬,东明..浮升力对水平管内超临界航空煤油传热影响数值研究[J].大连理工大学学报,2013,(6):816-823,8.
