• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >APIAN-INF: an aerodynamic and aeroacoustic investigation of pylon-interaction effects for pusher propellers
【2h】

APIAN-INF: an aerodynamic and aeroacoustic investigation of pylon-interaction effects for pusher propellers

机译：APIAN-INF：对推进器螺旋桨塔架相互作用的空气动力学和空气声学研究

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Advanced propellers promise significant fuel-burn savings compared to turbofans. When installed on the fuselage in a pusher configuration, the propeller interacts with the wake of the supporting pylon. This paper presents an experimental analysis of the aerodynamic and aeroacoustic characteristics of this pylon–propeller interaction. An isolated propeller was operated in undisturbed flow and in the wake of an upstream pylon at the large low-speed facility of the German–Dutch wind tunnels (DNW-LLF). Measurements of the pylon-wake characteristics showed that the wake width and velocity deficit decreased with increasing thrust due to the suction of the propeller. The installation of the pylon led to a tonal noise penalty of up to 24 dB, resulting from the periodic blade-loading fluctuations caused by the wake encounter. The noise penalty peaked in the upstream direction and became increasingly prominent with decreasing propeller thrust setting, due to the associated reduction of the steady blade loads. The integral propeller performance was not significantly altered by the pylon-wake encounter process. However, at sideslip angles of ±6°, the effective advance ratio of the propeller was modified by the circumferential velocity components induced by the pylon tip vortex. The propeller performance improved when the direction of rotation of the propeller was opposite to that of the pylon tip vortex. Under this condition, a reduction was measured in the noise emissions due to a favorable superposition of the angular-inflow and pylon-wake effects.
机译：与涡轮风扇相比，先进的螺旋桨有望节省大量燃油。当以推进器配置安装在机身上时，螺旋桨与支撑塔架的尾翼相互作用。本文介绍了这种塔架与螺旋桨相互作用的空气动力学和空气声学特性的实验分析。在德国－荷兰风洞（DNW-LLF）的大型低速设施中，一台孤立的螺旋桨在畅通无阻的气流中运行，并且在上游的塔架之后。塔架尾迹特性的测量结果表明，由于螺旋桨的吸力，尾迹宽度和速度不足会随着推力的增加而减小。塔架的安装导致音调噪声损失高达24 dB，这是由于遇到尾流而引起的周期性叶片负载波动引起的。噪声损失在上游方向达到峰值，并随着螺旋桨推力设置的降低而越来越突出，这归因于稳定叶片负载的相应减少。塔架-尾流接触过程不会明显改变整体螺旋桨的性能。但是，在侧滑角为±6°时，螺旋桨的有效推进比会因塔顶涡流引起的圆周速度分量而改变。当螺旋桨的旋转方向与塔尖旋涡的旋转方向相反时，螺旋桨的性能得到改善。在这种条件下，由于角流和塔式振铃效应的良好叠加，噪声排放有所降低。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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