Flow Characteristics and Ignition Performance Analysis of an Evaporating Cavity Trapped Vortex Pilot Flame-Holder

被引：0
|
作者：
Yu W.-B. [1 ]
Fan Y.-X. [1 ]
Yue C. [1 ]
Deng Y. [1 ]
机构：
[1] College of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 05期
关键词：
Afterburner/ramjet multi-mode combustor; Cavity trapped vortex; Equivalent ratio; Flow characteristics; Ignition characteristics; Pilot flame-holder;
D O I：
10.13675/j.cnki.tjjs.2206053
中图分类号：
学科分类号：
摘要：
In order to further broaden the ignition and blowout boundary of the cavity trapped vortex flame-holder at low temperature and high speed flow conditions，a novel preheated and premixed fuel supply method us⁃ ing core hot gas，is proposed for the evaporating cavity trapped vortex pilot flame-holder. The flow characteris⁃ tics，fuel distribution characteristics and ignition performance under wide range flow conditions of evaporating cavity trapped vortex pilot flame-holder are obtained. The results show that the vortex structure formed inside the cavity and mixing chamber of the evaporating cavity trapped vortex pilot flame-holder provide favourable condi⁃ tions for ignition and combustion at low temperature and high speed. The fuel spray distribution in the vortex zone of the cavity is evenly distributed in the flow direction，and decreases from the richest of the symmetrical meridi⁃ an surface of the flame-holder to the poorest of the middle surfaces of the adjacent flame-holder along the circum⁃ ferential direction. At the same flow temperature，the lean ignition and blowout equivalent ratio of the evaporating cavity trapped vortex pilot flame-holder increases with the increase of the inlet speed. Under low temperature （600K），high speed（100~200m/s）flow conditions，compared with evaporating Z-shaped flame-holder and tra⁃ ditional film evaporation flame-holder，evaporating cavity trapped vortex pilot flame-holder can decrease the ig⁃ nition equivalent ratio by 5.5% and 30%，respectively. Blowout equivalent ratio can be decreased by 37.4% and 48.8%，respectively. © 2023 Journal of Propulsion Technology. All rights reserved.
引用
收藏
相关论文
共 21 条
  • [1] 32, 1, pp. 57-62, (2019)
  • [2] Sziroczak D，, Smith H., A Review of Design Issues Specif⁃ ic to Hypersonic Flight Vehicles［J］, Progress in Aerospace Sciences, 84, pp. 1-28, (2016)
  • [3] WU Yun-ke, Zhi-qiang LI, YANG Qian, Et al., Cold Flow and Combustion Characteristics of a Prototype Folded-V Flame Holder［J］, Journal of Propulsion Technology, 42, 6, pp. 1321-1328, (2021)
  • [4] CHEN Yu-qian, FAN Yu-xin, ZHAO Shi-long, Et al., Numerical Study for Ef⁃ fects of Air-Cooled Jet on Flow Characteristics and Tem ⁃ perature Distribution of Wall Flameholder［J］, Journal of Propulsion Technology, 43, 3, (2022)
  • [5] WU Wei-qiu, FAN Yu-xin, MIAO Junjie, Et al., Flow and Ignition Characteristics of Wall Com ⁃ bined with Radial Flame-Holder［J］, Journal of Propulsion Technology, 43, 7, (2022)
  • [6] Chen S., Spinning Effects on a Trapped Vortex Combustor ［J］, Journal of Propulsion and Power, 32, 5, pp. 1133-1145, (2016)
  • [7] 31, 5, pp. 11-17, (2018)
  • [8] Zhao D，, Gutmark E，, Goey P D., A Review of Cavity-based Trapped Vortex，Ultra-compact，High-g，Inter-turbine Combustors［J］, Progress in Energy and Combustion Science, 66, pp. 42-82, (2018)
  • [9] Gruber M R，, Baurle R A，, Mathur T，, Et al., Fundamental Studies of Cavity-Based Flame-Holder Concepts for Su⁃ personic Combustors［J］, Journal of Propulsion and Power, 17, 1, pp. 146-153, (2015)
  • [10] McNelis N, Bartolotta P., Revolutionary Turbine Acceler⁃ ator （RTA）Demonstrator ［R］
123