A unified spray model for large eddy simulations under non-flashing and flash boiling conditions: Effects of in-nozzle flow and external thermal breakup in liquid ammonia injection

被引：0

作者：

Jin, Zhuoying ^{[1
]}

Wu, Haoqing ^{[1
]}

Xu, Shijie ^{[1
]}

Zhou, Dezhi ^{[2
]}

Mi, Shijie ^{[1
]}

Qian, Yong ^{[1
]}

Lu, Xingcai ^{[1
]}

机构：

[1] Key Laboratory for Power Machinery of M.O.E, Shanghai Jiao Tong University, Shanghai, 200240, China

[2] UM-SJTU Joint Institute, Shanghai Jiao Tong University, Shanghai, 200240, China

来源：

International Journal of Multiphase Flow | 2025年 / 184卷

关键词：

Gas turbines;

D O I：

10.1016/j.ijmultiphaseflow.2024.105116

中图分类号：

学科分类号：

摘要：

As a carbon-free fuel, liquid ammonia is promising to be applied in gas turbines and marine engines to facilitate the decarbonization of energy and transportation sectors. However, ammonia has a high saturation pressure which leads to the transition from non-flashing to flash boiling atomization mechanisms and introduces challenges in modeling the liquid ammonia spray. It is essential to study the spray behavior and propose a unified spray model with high accuracy and implementation efficiency under wide operation conditions. In this study, a numerical model is developed under the Lagrangian-Eulerian framework to consider various breakup mechanisms. This model is then adopted for the spray simulations of liquid ammonia and validated against measurements. Firstly, the spray patterns are classified as normal evaporation (Rp ≥ 1.0), external flash boiling (1.0 © 2024 Elsevier Ltd

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