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首页> 外文期刊>Ocean Engineering >Pulsatile vortex generators for low-speed maneuvering of small underwater vehicles
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Pulsatile vortex generators for low-speed maneuvering of small underwater vehicles

机译：小型水下航行器的低速机动脉冲涡流发生器

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Compact zero-mass pulsatile jet actuators are proposed for low-speed maneuvering and station keeping of small underwater vehicles. The flow field of such jets are initially dominated by vortex ring formation. Pinched-off vortices characterize the extremum impulse accumulated by the leading vortex ring in a vortex ring formation process. Relevant parameters in this process are identified in order to design simple and low cost zero-mass pulsatile jet actuators. Thrust optimization of synthetic jets for maximal thrust generation is achieved by enforcing the jet formation number to be around 4. Prototypes of such actuators are built and tested for underwater maneuvering and propulsion. The actuators could be used in two ways: (ⅰ) to improve the low-speed maneuvering and station keeping capabilities of traditional propeller driven underwater vehicles, and (ⅱ) as a synthetic jet for flow control and drag reduction at higher cruising speeds. A model for calculating the rotation rate of the underwater vehicle is also proposed and verified.
机译：提出了紧凑的零质量脉动喷射致动器，用于小型水下航行器的低速操纵和驻车保持。这种射流的流场最初主要由涡流环形成所主导。夹住的涡流表征了在涡流环形成过程中前导涡流环积累的极值脉冲。确定该过程中的相关参数，以设计简单且低成本的零质量脉动喷射致动器。通过使射流形成数大约为4，可以实现合成射流的推力优化，以最大程度地产生推力。为此类操纵器的原型制造并对其进行了水下操纵和推进测试。可以以两种方式使用执行器：（ⅰ）改善传统螺旋桨驱动的水下航行器的低速操纵和驻地保持能力；（ⅱ）作为合成射流用于在较高巡航速度下进行流量控制和减阻。还提出并验证了用于计算水下航行器转速的模型。

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