Effects of design variables on the liquid breakup and the atomization characteristics of rotary atomizers for small gas turbine combustors

被引：0
作者：
Seo, Yechan [1 ]
Ryu, Gyongwon [2 ]
Lee, Jeekeun [3 ]
机构：
[1] Jeonbuk Natl Univ, Grad Sch Mech Syst Engn, Jeonju 54896, South Korea
[2] Agcy Def Dev ADD, Daejeon 34186, South Korea
[3] Jeonbuk Natl Univ, Div Mech Syst Engn, Jeonju 54896, South Korea
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2025年 / 239卷
关键词：
Aviation gas turbine combustor; Rotary atomizer; Spray characteristics; Liquid breakup; Sauter mean diameter (SMD); SPRAY CHARACTERISTICS; JET; IGNITION; FLOW;
D O I：
10.1016/j.ijheatmasstransfer.2024.126607
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Slinger nozzles are a class of rotary atomizers applied in gas turbine combustors, which atomize liquid fuels using the rotational kinetic energy of the turbine shaft. In this study, the influence of design and operating variables on the spray characteristics of the slinger nozzle was investigated to predict the atomization performance inside the gas turbine combustor. The nozzle radius (Ro = 49 mm, 40 mm), the number of nozzle orifices (N = 4, 6, 8, 10, 12), and the diameter of the nozzle orifice (d = 3 mm, 4 mm) were changed as design variables. A high-speed camera was applied to visualize the spray behavior of the nozzle, and the droplet size was measured using a two-dimensional phase Doppler particle analyzer. The experimental results showed that the spray characteristics of the slinger nozzle are highly related with the nozzle design variables. Correlation maps applicable to predict the influence of design variables on slinger nozzle spray characteristics were presented. The effects of design variables on the Sauter mean diameter (SMD) were quantified using multiple regression analysis, and a simplified equation to predict the slinger nozzle atomization performance was presented.
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页数：12
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