中心进气复杂旋转盘压力特性的实验研究

中心进气具有两个出口的旋转盘系统中静盘表面沿半径方向的静压分布由实验方法获得.针对转速、冷却气体流量以及叶片冷却孔的存在与否对腔内流动特性的影响进行了分析.结果表明:在本实验范围内,静盘表面静压沿半径方向先减小,后增大.静盘表面静压随着总流量的增加而增加,随转速增加而降低.当减少盘面出流孔的数量时,静盘表面静压将会增加.当冷却气体流量较大时,盘腔内不能形成明显的旋转核心.

Experimental study of static pressure characteristics at stator surface in a rotor-stator disk cavity

Radial distribution of the static pressure at stator surface was m easured in a rotor-stator disk cavity with centric inflow and two outflows. Coo l ing air enters at the center of the system and leaves through the holes in the r otor and clearance between rotor and shroud. The influences of disk rotational speed, mass flow rate of inlet and presence o f the blade-cooling holes on the flow characteristics in the cavity were investigated. Results show that, within the ranges of the experiments, the static pressure on the stator f irstly decreases and then increases along the radial direction. Static pressure is also increasing with the cooling air flow rate, but decreasing as the disk ro tational speed and the numbers of blade-cooling holes increase. When the coolin g air flow rate is greater, there is no an obvious core fluid rotation formed in the cavity.