摘要
实验研究了近零冲角条件下叶片正弯曲对某大折转角扇形扩压叶栅壁面静压的影响。结果表明:直叶片吸力面静压系数等值线呈现明显的反"C"型分布,采用正弯叶片后反“C”型压力分布的强度逐渐增大;流道内静压被重新分布,其中流道内径向压力梯度的改变对附面层和损失发展影响最大;正弯叶片引起的叶展中部损失的激增是导致总损失增大的主要因素,其中15°正弯叶栅改善流动、减小损失的效果最好。
Experimental study was carried out for the effects of positive curved blade on surface static pressure in annular compressor cascades with large camber angles. The results showed that with the increase of curved angle, opposite C-shape static pressure distribution on suction surface of curved cascades became more acutely than straight blade. Static pressure was distributed in the flow passage of curved cascade, and the change of radial pressure grads affected maximally the development of boundary layer and loss. The acute increase of loss near mid-span was the main factor in the increase of total loss, and the positive curved blade with 15° had the greatest affect of improving flow and reducing total loss.
出处
《燃气涡轮试验与研究》
2006年第4期1-5,共5页
Gas Turbine Experiment and Research
关键词
压气机叶栅
实聆研究
冲角
静压
compressor cascade
experimental investigation
incidence
static pressure
