...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aerospace science and technology >Experimental investigation of the effect of extended cowl on the flow field of planar plug nozzles
【24h】

Experimental investigation of the effect of extended cowl on the flow field of planar plug nozzles

机译：延长罩在平面塞喷嘴流场效果的实验研究

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

Plug and ramp nozzles offer many advantages over the conventional converging-diverging counterpart and have received much attention in the recent decades. Variants of plug nozzles have been investigated for a wide range of operating conditions. The performance of these nozzles is dependent on the flow development on the plug or ramp surface, which in turn is greatly influenced by the cowl geometry. Experiments are conducted to study the planar plug nozzle flowfield for Mach 1.8 and 2.2 using half nozzle geometry. The work primarily focuses on the influence of the cowl length on the flow evolution on the plug surface at different nozzle pressure ratios (NPRs). The cowl of the outer nozzle is extended to 10, 30, 50 and 100% of the full plug length. This allows the supersonic flow to partially expand internally ahead of the throat section. Schlieren images are used to visualize the wave structure at different pressure ratios for different cowl lengths. For low NPRs, the nozzle with extended cowl behaves more like a conventional planar nozzle with strong shock waves. It is observed that the cowl length influences the pressure distribution on the plug surface only for low NPRs. The effect of side walls on the flow field of planar plug nozzles is also studied. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译：插头和坡道喷嘴提供了传统的趋同分歧的同行提供了许多优点，并且在近几十年中得到了很多关注。已经研究了塞子喷嘴的变体，用于各种操作条件。这些喷嘴的性能取决于插头或斜坡表面上的流动开发，这反过来受到牛仔几何形状的大大影响。进行实验，以研究Mach 1.8和2.2的平面插头喷嘴流场使用半喷嘴几何形状。工作主要集中在不同喷嘴压力比（NPRS）下吞越沟槽长度对塞面上的流动演变的影响。外喷嘴的罩延伸到全塞长度的10,30,50和100％。这允许超音速流动在喉部内部部分地膨胀。 Schlieren图像用于可视化不同压力比的波结构，用于不同的涡流长度。对于低NPRS，具有延长的罩的喷嘴更像是具有强冲击波的传统平面喷嘴。观察到涡流长度仅对低NPRS影响插头表面上的压力分布。还研究了侧壁对平面插头喷嘴的流场的影响。 （c）2019年Elsevier Masson SAS。版权所有。

著录项

  • 来源
    《Aerospace science and technology》 |2019年第5期|208-221|共14页
  • 作者

    Khan Aqib; Panthi Rohit; Kumar Rakesh; Ibrahim S. Mohammed;

  • 作者单位

    Indian Inst Technol Kanpur Dept Aerosp Engn Kanpur 208016 Uttar Pradesh India;

    Indian Inst Technol Kanpur Dept Aerosp Engn Kanpur 208016 Uttar Pradesh India;

    Indian Inst Technol Kanpur Dept Aerosp Engn Kanpur 208016 Uttar Pradesh India;

    Indian Inst Technol Kanpur Dept Aerosp Engn Kanpur 208016 Uttar Pradesh India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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