...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Journal of Oceanic Engineering >Thrust Characterization of a Bioinspired Vortex Ring Thruster for Locomotion of Underwater Robots
【24h】

Thrust Characterization of a Bioinspired Vortex Ring Thruster for Locomotion of Underwater Robots

机译：用于水下机器人运动的生物启发涡环推力器的推力特性

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

A new type of thrusting technology, loosely inspired by the locomotion of cephalopods, offers promising low-speed maneuvering capabilities for a new generation of underwater vehicles and robots. The actuators consist of a small cavity with a moving wall on one side and an orifice on the other side. The net effect of periodic movement of the moving wall is the ingestion of low-momentum fluid inside the cavity and then the expulsion of the fluid as a pulsatile jet from the orifice, with no net mass flux. Continuous operation of the actuator results in a synthetic jet. The actuators provide a net positive momentum flux with zero net mass flux. They are compact with no extruding components to negatively impact the vehicle's drag at cruising speed. Parameters controlling the pulsatile jet and its thrust are identified. The thruster was empirically tested for a large range of frequencies and stroke ratios. The thrust characteristics of the device with respect to frequency was seen to converge to a single thrust coefficient. A model was developed to predict the thrust coefficient. The effect of the stroke ratios on the thrust coefficient is investigated. The model accurately predicts the observed thrust coefficient for stroke ratios up to five where the vortex ring pinchoff occurs. The accuracy of the model degrades for stroke ratios above the formation number where part of the expelled jet is pulled back into the cavity. Additionally, these devices have thrust tracking times faster than those reported for typical propellor-type thrusters, and deliver a fully quantized level of thrust.
机译：不受头足动物运动启发的新型推力技术为新一代水下航行器和机器人提供了有希望的低速操纵能力。促动器由一个小腔组成，该小腔的一侧带有活动壁，另一侧带有孔口。活动壁周期性运动的净效果是在腔体内摄入低动量的流体，然后以脉动射流的形式从孔口排出流体，而没有净质量通量。执行器的连续操作会产生合成射流。执行器提供净正动量通量，净通量为零。它们紧凑，没有挤压组件，不会以巡航速度对车辆的阻力产生负面影响。确定控制脉动射流及其推力的参数。对推进器进行了大范围的频率和冲程比的经验测试。观察到该装置相对于频率的推力特性收敛到单个推力系数。开发了一个模型来预测推力系数。研究了行程比对推力系数的影响。该模型可以准确预测在发生涡流环夹断的情况下冲程比最高为5时观察到的推力系数。当冲程比高于地层数时，模型的精度会下降，在这种情况下，部分排出的射流会被拉回空腔。此外，这些设备的推力跟踪时间比典型的螺旋桨式推进器要快，并且可以提供完全量化的推力水平。

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