摘要
建立二维篦齿模型,运用数值方法,从分析齿腔内流场和篦齿顶板换热的角度研究了篦齿的封严特性.通过多种工况的计算,探讨了雷诺数、齿顶宽和齿隙之比对篦齿腔内流动、压降损失以及齿腔顶板换热系数之间的关系.计算数据和实验数据进行比较,发现变化规律一致,误差较小.研究结果表明:雷诺数、齿顶宽和齿隙之比影响着齿腔内部流动和换热的状态,是最终成为决定篦齿封严效果的重要因素.
In order to investigate the performance of straight sealing labyrinth at static state in aero engine, a model of straight sealing labyrinth was established and applied to compute the flow characteristics and heat transfer in the straight sealing labyrinth. With the result of numerical simulation, the effects of Reynolds numbers and TIC on flow field, pressure loss, and coefficient of heat transfer were studied. By comparing some group results of numerical simulation and experiments data, it is found that the numerical results are in agreement with experimental data and the error can be acceptable. The results show that the Reynolds number and TIC affect the flow characteristics and heat transfer in the straight sealing labyrinth and thus are important factors in deciding the sealing performance of straight labyrinth.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2008年第3期448-453,共6页
Journal of Aerospace Power
关键词
航空
航天推进系统
直通式封严篦齿
雷诺数
换热系数
aerospace propulsion system
heat transfer coefficient straight sealing labyrinth
Reynolds number
heat transfer coefficient
