Liquid fuel spray characteristics in gas turbine cascade passage

被引：0
作者：
机构：
[1] School of Architecture and Civil Engineering, Ningbo University of Technology, Ningbo 315016, Zhejiang Province
[2] Institute of Engineering Thermo-physics, Chinese Academy of Sciences, Beijing 100190, Haidian District
来源：
Mao, Y. (myh6@163.com) | 1600年 / Chinese Society for Electrical Engineering卷 / 34期
关键词：
Fraunhofer diffraction; Jet in crossflow; droplet diameter; Secondary combustor; Spray trajectory;
D O I：
10.13334/j.0258-8013.pcsee.2014.05.014
中图分类号：
学科分类号：
摘要：
In order to research the liquid fuel spray characteristics in turbine cascade passage, experiment was focused on straight channel and cascade channel with different turning angle (30 degree and 60 degree). The inlet velocity in experiment varied from 56 m/s to 91m/s and the injector pressure difference varied from 50 kPa to 400 kPa. Fuel injector was injected at blade leading edge in turbine cascade channel. Fraunhofer diffraction technique was used to measure droplet diameter, and the spray trajectory was recorded by CCD camera. The result shows that spray trajectory in turbine cascade passage is influenced by liquid-air momentum ratio as well as blade turning angle. Reverse jet and lateral jet to suction surface at leading edge in cascade channel have better atomization effect than lateral jet in straight channel. Injecting to blade suction surface have a Sauter mean diameter less than 30 μm when the nozzle pressure is greater than 400 kPa, the atomizing fineness can meet the requirements of gas turbine combustor. © 2014 Chin. Soc. for Elec. Eng.
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页码：808 / 813
页数：5
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