...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aerospace science and technology >Engine pre-entry thrust and standard net thrust evaluation based on the far-field method
【24h】

Engine pre-entry thrust and standard net thrust evaluation based on the far-field method

机译：基于远场方法的发动机预进气推力和标准净推力评估

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

Computation of engine pre-entry thrust is required to evaluate aircraft configuration drag. Numerical computation of this quantity requires knowledge of the captured streamtube, which depends on the stagnation line location. A new method that uses the far-field formulation is developed so that knowledge of the streamtube properties is no longer required. Using similar techniques, an alternative method to compute the standard net thrust, the basis of most thrust/drag bookkeeping systems, is introduced. The classical formulation to compute the standard net thrust needs interpolation of flow quantities in the nacelle's exit plane which leads to loss of accuracy. Theoretical development of the far-field method in power-on conditions is presented as well as an overview of the bookkeeping technique in CFD. Simulations are performed with ANSYS Fluent 13.0 on the isolated CFM56 nacelle in power-on conditions with varying boundary conditions. Results of the proposed approaches are in agreement with ESDU and classical formulations. Drag decomposition in terms of viscous, wave, spurious, induced, and through-flow drag is presented. Configuration drag is computed with two formulations which are in agreement. (C) 2015 Elsevier Masson SAS. All rights reserved.
机译：为了评估飞机的配置阻力，需要计算发动机的进入力。此数量的数值计算需要了解捕获的流管，这取决于停滞线的位置。开发了使用远场公式的新方法，因此不再需要了解流管特性。使用类似的技术，介绍了一种计算标准净推力的替代方法，该方法是大多数推力/阻力簿记系统的基础。计算标准净推力的经典公式需要对机舱出口平面中的流量进行插值，这会导致精度损失。介绍了开机条件下远场方法的理论发展，并概述了CFD中的簿记技术。使用ANSYS Fluent 13.0在隔离的CFM56机舱上，边界条件变化的情况下进行仿真。所提出的方法的结果与ESDU和经典公式一致。提出了根据粘性，波动，寄生，感应和通流阻力的阻力分解。配置阻力是通过两个公式计算得出的。 （C）2015 Elsevier Masson SAS。版权所有。

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