带导流片突扩燃烧室冷态流场的初步测量

MEASUREMENT OF COLD FLOW IN A SUDDEN-EXPANSION BURNER WITH A VANE

关键词:  突扩型燃烧室  导流片  冷流试验  流场  测量

Key words:  Dump combustion chamber  Guied vane  Cold flow test  Flow field  Measurement

摘要:

对带有导流片的突扩燃烧室的冷态流场做了初步观察和测量。实验研究包括三个导流片的后缘角,纵向及横向位置各二个,共十三个结构的流场观测。研究结果表明:随叶片后缘角增加,回流区的长度明显减小,总压损失增加,而且叶片的位置和结构角对流场特征有一定的影响。因此,加导流片控制突扩燃烧室流场的方法是有希望的。

Abstract:

The cold flow in a sudden-expansion burner with a vane was viewed and surveyed preliminarily .Thirteen patterns of flow field are presented to discribe the effect of different vane trailing angles and different positions. The results show that with increasing of the vane trailing angle, the length of the recirculating flow and the total pressure loss rise. The distortion in the burner exit decreases.The method by using vane to control the flow field in a sudden-expansion burner is available.