摘要
采用数值模拟方法,对再生冷却通道和跨临界甲烷进行三维流动与传热耦合计算.采用经验公式模拟燃气侧对流和辐射换热,考虑跨临界甲烷物性随温度和压力的变化.所得结果表明:甲烷比定压热容、黏度、导热系数在冷却通道截面出现极值,阻碍其热量交换,流场分层、流速非对称明显;冷却通道温度沿径向减小,沿周向增加至通道中心达到最大,在肋根处热流密度最低.
Three-dimensional numerical simulation was carried out for coupled flow and heat transfer of regenerative cooling channel and transcritical methane.The empirical method was used to simulate hot-gas convective and radiative heat transfer;the coolant was transcritical methane whose thermophysical properties varied with both temperature and pressure.The results show that the methane specific heat at constant pressure,viscosity and thermal conductivity reach extremum in the cross section of cooling channel,making it hard to diffuse heat flux and leading to flow field stratification;the wall temperature decreases along radial direction,increases along circumferential direction and reaches its peak value at the center of cooling channel,meanwhile the wall heat flux reaches lowest value at fin corners.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2010年第11期2493-2497,共5页
Journal of Aerospace Power
关键词
再生冷却
跨临界
甲烷
流动传热
数值模拟
regenerative cooling； transcritical； methane； flow and heat transfer； numerical investigation；
