摘要
使用气体体积分数法得到了多齿轮缘封严的封严效率分布,获得封严效率随无量纲封严流量变化规律,最终拟合得出实验工况下的最小封严流量计算关联式(实验中主流雷诺数为1.42×105~3.20×105,旋转雷诺数为5.27×105~1.36×106).通过对二氧化碳体积分数的测量结果表明:在盘腔内部高半径处封严效率较低,而低半径处封严效率一直处于较高的水平;封严效率随封严流量的变化与Owen封严效率方程有较好符合度,说明可以用封严效率方程对多齿轮缘封严进行预测,实验结果进一步扩展了其应用范围.
The gas volume fraction method was used to achieve the distribution of the sealing effectiveness of multi-tooth rim sealing,and the sealing effectiveness varied with the non-dimensional sealing flow rate,and finally the correlation of the minimum sealing flow rate was obtained（mainstream Reynold number from 1.42×10~5 to 3.20×10~5,rotating Reynold number from 5.27×10~5 to 1.36×10~6）.The measurement results of carbon dioxide volume fraction showed that the sealing effectiveness was low at high radius but high at low radius.The changes in the sealing effectiveness with the sealing flow rate agreed well with Owen’s sealing effectiveness equations,so the sealing characteristic could be predicted,and the experimental results expanded its application scope.
作者
罗翔
康文武
全永凯
杜发荣
徐国强
LUO Xiang KANG Wen-wu QUAN Yong-kai DU Fa-rong XU Guo-qiang(National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2017年第1期8-13,共6页
Journal of Aerospace Power
关键词
多齿轮缘封严
燃气入侵
封严效率
体积分数法
最小封严流量
multi-tooth rim sealing
gas ingestion
sealing effectiveness
volume fraction method
minimum sealing flow rate
