摘要
为了分析对比新型冲击/发散冷却层板隔热屏冷却性能,论证其应用于加力燃烧室的可行性,在3种不同主次流总压比条件下对其进行了三维流固耦合传热数值模拟研究,并与某型波纹板隔热屏和单层平板隔热屏进行了相同工况的对比分析,得到了冷却效果、冷气用量、冷气热负荷和次流总压损失系数等的对比结果和变化规律.结果表明:冲击/发散冷却层板隔热屏具有较好的冷却效果,但其受主次流总压比变化的影响较大.相比某型波纹板,冲击/发散冷却层板隔热屏的冷气消耗量平均减少41.6%,单位面积冷气热负荷平均降低65.9%.
In order to study the cooling performance of impingement/effusion cooling lamilloy contrastively and demonstrate the possibility of using impingement/effusion cooling lamilloy as heat shield in afterburner,a series of three-dimensional numerical simulations using fluid/solid conjugated computation method of heat transfer were conducted under three different total pressure ratio of the primary fluid to the secondary fluid conditions,and contrastive studies were carried out with both a type of corrugated heat shield and a single flat plate heat shield.Contrastive results of cooling performance,coolant consumption,coolant heat load and total pressure loss coefficient of the secondary flow were acquired.The results show that impingement/effusion cooling lamilloy has good cooling performance,but it is most affected by the change of total pressure ratio.Compared with conventional corrugated heat shield,the coolant consumption of impingement/effusion cooling lamilloy decreases by41.6%averagely,and the coolant heat load decreases by 65.9%averagely.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2014年第6期1272-1278,共7页
Journal of Aerospace Power
