首页> 外文会议>AIAA Aviation Forum >Experimental analysis of passive bristling in air to enable mako-shark-inspired separation control
【24h】

Experimental analysis of passive bristling in air to enable mako-shark-inspired separation control

机译:空气中无源刷毛的实验分析,使Mako-Shark-Inspativation Contopation Control实现

获取原文

摘要

Water tunnel studies have demonstrated that the skin of the fast-swimming shortfin mako shark (Isurus oxyrinchus) exhibits a passive method to limit flow separation. Limiting flow separation with such a mechanism could lead to reductions in pressure drag and increases in thrust and maneuverability for man-made systems as well as sharks. The flow control mechanism is enabled by the passive bristling of mako denticles. This paper describes initial efforts to realize the extension of the previous work in water to flows in air. A wind tunnel test of a mako skin-covered airfoil found no evidence of flow control. A benchtop study in air has determined that denticle bristling requires dynamic pressures over an order of magnitude greater in air than in water. Evidence suggests that this difference is caused by surface tension on the mako skin, which must be kept moist to prevent stiffening of the dermis. A first-generation mechanical model has been fabricated to mimic mako skin without these complicating moisture factors. The model achieved denticle bristling in air at similar dynamic pressures as real mako denticles in water, demonstrating that the limitations of real skin do not extend to mechanical models of mako skin and suggesting a path forward for future studies of this mechanism in air. An improved model has been integrated into the upper surface of an airfoil with wind tunnel testing planned.
机译:水隧道研究表明,快速游泳短氟虫鲨鱼(Isurus oxyrinchus)的皮肤表现出一种限制流动分离的被动方法。利用这种机构的限制流动分离可能导致压力阻力和增加人工系统以及鲨鱼的推力和机动性增加。流量控制机构通过Mako牙本丛的被动刷毛使能。本文介绍了实现在水中延伸以便在空中流动的初步努力。 Mako皮肤覆盖的翼型的风洞试验发现没有流量控制的证据。空气中的台式研究已经确定牙口刷毛在空气中比水中的数量级更大的动态压力。证据表明,这种差异是由Mako皮肤上的表面张力引起的,这必须保持湿润以防止真皮加强。已经制造了第一代机械模型,以模仿Mako皮肤,没有这些复杂的水分因子。该模型在类似的动态压力下实现了在空中的空气中,作为水中的真正的Mako牙本丛,证明了真正的皮肤的局限性不会延伸到Mako皮肤的机械模型,并提出了对空气中这种机制的未来研究的前进的道路。改进的模型已集成到具有风洞测试的翼型的上表面中。

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