...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >The influence of nozzle deflection on fluid dynamic and infrared characteristics of a two-dimensional convergent-divergent vectoring exhaust system
【24h】

The influence of nozzle deflection on fluid dynamic and infrared characteristics of a two-dimensional convergent-divergent vectoring exhaust system

机译：喷嘴偏转对二维收敛-发散矢量排气系统流体动力学和红外特性的影响

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

Superior maneuverability and good infrared stealthy properties are two key points of the future aircraft. A two-dimensional convergent-divergent (2D-CD) vectoring exhaust system can improve the maneuverability of aircrafts and has been widely applied to the latest generation aircrafts. Understanding fluid dynamic and infrared radiation characteristics of the 2D-CD vectoring exhaust systems under different conditions of the nozzle deflection is very crucial, which can provide significant information for the suppression of the infrared radiation property of the 2D-CD vectoring exhaust system. In this paper, by means of computational fluid dynamics, the fluid dynamic and infrared radiation characteristics of the 2D-CD vectoring exhaust system are studied at subsonic cruise status with nozzle deflection angles from 0 to 20 degrees, and the results are compared with those of the baseline axisymmetric exhaust system. The results indicate that the fluid dynamic performance of a properly designed 2D-CD vectoring exhaust system is equivalent to the fluid dynamic performance of the baseline axisymmetric exhaust system. When the nozzle deflection angle is less than 5 degrees, the mass flow and thrust force of the 2D-CD vectoring exhaust system are almost unchanged, and with the increase of the nozzle deflection angles, the mass flow and thrust force decrease rapidly. The thrust force deflection angles lag behind the nozzle deflection angles all the time, and as the nozzle deflection angle increases, the difference between them decreases. The direction of the maximum infrared radiation of the 2D-CD vectoring exhaust system deflects with the deflection of the nozzle, and the mean integrated infrared radiation intensity of the exhaust system decreases with the increase of nozzle deflection angles.
机译：出色的机动性和良好的红外隐身性能是未来飞机的两个关键点。二维会聚-发散（2D-CD）矢量排气系统可以改善飞机的机动性，并已广泛应用于最新一代飞机。了解在不同喷嘴偏转条件下2D-CD矢量排气系统的流体动力学和红外辐射特性非常关键，这可以为抑制2D-CD矢量排气系统的红外辐射特性提供重要信息。本文通过计算流体动力学，研究了亚音速巡航状态下喷嘴偏转角为0至20度的2D-CD矢量排气系统的流体动力学和红外辐射特性，并将结果与基线轴对称排气系统。结果表明，正确设计的2D-CD矢量排气系统的流体动力学性能与基线轴对称排气系统的流体动力学性能等效。当喷嘴偏转角小于5度时，2D-CD矢量排气系统的质量流量和推力几乎不变，并且随着喷嘴偏转角的增加，质量流量和推力急剧下降。推力偏转角一直滞后于喷嘴偏转角，并且随着喷嘴偏转角增大，它们之间的差减小。 2D-CD矢量排气系统的最大红外辐射方向随喷嘴的偏转而偏转，并且排气系统的平均积分红外辐射强度随喷嘴偏转角的增加而减小。

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