1.5级跨声压气机中时序效应的研究

以在建中的1.5级跨声压气机试验台所使用的压气机为研究对象,利用计算流体力学方法对其内部时序效应进行了研究.研究表明:静叶尾迹与出口导叶边界层中低能流体发生掺混时,掺混损失小,压气机效率高;静叶尾迹与出口导叶主流区中的高能流体掺混时,掺混损失大,压气机效率低,且最高效率与最低效率相差约0.4%;入口导叶与静叶间时序效应不明显.此外,得出了静叶-出口导叶轴向间隙与静叶-出口导叶间最佳时序位置的关系曲线.

Investigation on clocking effect of 1.5-stage transonic compressor

The clocking effect in the 1.5-stage compressor, which would be used in the 1.5-stage transonic compressor test rig, was investigated by computational fluid dynamics (CFD) method in this paper. The results show that: (1) The compressor efficiency is high and mixing loss is low when the stator wake is mixed with the outlet guide vane (OGV) boundary-layer fluid. (2) The compressor efficiency is low and mixing loss is high when the stator wake is mixed with the OGV main flow area fluid. (3) The highest efficiency is 0.4% higher than the lowest efficiency. (4) The inlet guide vane (IGV)-stator clocking effect can be neglected, just leading to 0.025%0 improvement of compressor efficiency. Besides, the op-timal clocking position versus the stator-OGV axial clearance plot was got.