...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >CALCULATION OF EXHAUST PLUME STRUCTURE AND EMISSIONS OF THE ER 2 AIRCRAFT IN THE STRATOSPHERE
【24h】

CALCULATION OF EXHAUST PLUME STRUCTURE AND EMISSIONS OF THE ER 2 AIRCRAFT IN THE STRATOSPHERE

机译：平流层中ER 2飞机的排气羽状结构和排放计算

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Calculations are presented for the NASA ER 2 aircraft at high altitude to simulate measurements taken of its own emissions during a wake-crossing event. Results are presented for a Mach = 0.71 case in the lower stratosphere with an engine NOX emission index of 4.6 corresponding to the measured value. A series of codes was used in the analysis to calculate the flow field and chemical kinetics, from the engine combustor out to a distance of about 20.2 km (97 s). Initial plume properties were calculated with a two-dimensional computational fluid dynamics (CFD) code with finite rate chemistry. The results of the plume code initialized a three-dimensional parabolized Navier-Stokes (PNS) reacting flow solution, where the plume dynamics interacting with the aircraft wake were calculated out to the region of plume breakup. Results show that the early shape and mixing rate of the engine exhaust plume are dominated by the presence of the aircraft vortex wake. Model results for NOY emissions compare well to in situ measurements taken in the field. Calculated exhaust species evolutions predict several species ratios in good agreement with field data. The mixing rate of the engine plume was also predicted to be consistent with dilution measured in the field. [References: 26]
机译：提出了NASA ER 2飞机在高空的计算结果，以模拟穿越尾流事件期间其自身排放物的测量结果。给出了平流层下部马赫= 0.71情况的结果，发动机NOX排放指数为4.6，与测量值相对应。分析中使用了一系列代码来计算从发动机燃烧室到大约20.2 km（97 s）的距离的流场和化学动力学。初始羽状流特性是通过二维计算流体动力学（CFD）代码以有限速率化学计算的。羽流代码的结果初始化了三维抛物线的Navier-Stokes（PNS）反应流解决方案，其中计算了与飞机尾流相互作用的羽流动力学，直到羽流破裂区域。结果表明，发动机尾气羽流的早期形状和混合速率受飞机涡流尾流的影响。 NOY排放的模型结果与现场进行的现场测量相比较很好。计算得出的废气种类演变预测了几种种类的比率，与现场数据非常吻合。还预测了发动机羽流的混合速率与现场测得的稀释度一致。 [参考：26]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号