Suppressed by the up passage vortex at upstream side of blade, the intensity and scale of the tip clearanceleakage vortex is decreased.
渐缩型间隙在叶片前半轴弦受到上通道涡的抑制，减少了叶顶间隙泄漏涡的强度和范围；
2
Calculations show that the annular clearanceleakage by the mode of gradually reducing clearance is much less than that by the mode of equidimension clearance.
文末算例表明，渐缩间隙模型的环隙漏失量比平行平板模型的环隙漏失量小得多。
3
Downstream rotor-stator interaction increases the unsteady fluctuating intensities of the rotor tip clearance flow and the tip leakage loss.