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燃气轮机透平叶栅流道内液体射流特性

DOI: 10.13334/j.0258-8013.pcsee.2014.05.014, PP. 808-813

Keywords: Fraunhofer衍射,横向射流,液滴粒径,射流轨迹,次燃烧室

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Abstract:

为研究液体在透平叶栅流道内雾化特性,在直流道和折转角分别为30°、60°的叶栅流道内进行了液体横向射流雾化试验,试验来流速度为56~91m/s,喷嘴压差为50~400kPa,采用喷油杆结构布置在叶片前缘喷射燃料,用Fraunhofer衍射技术测量液滴雾化细度,用CCD相机记录流道内液滴射流轨迹。研究发现:透平叶栅流道内液滴轨迹同时受液气动量比、叶片折转角度的影响,在叶片前缘向吸力面侧喷和逆喷时的雾化效果优于直流道内横向侧喷。喷嘴压差大于400kPa时,向叶片吸力面侧喷的液滴索泰尔平均直径小于30μm,雾化粒径可满足燃气轮机燃烧室的要求。

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