Control of Supercavitating Vehicles using Transverse Jets
Technical Report,15 Jun 2013,15 Dec 2015
Mechanical Engineering Department California State University Northridge United States
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The primary objective of this experimental study was to investigate the effects of high freestream velocity and an upstream ventilated cavity on the loads generated by a zero-net-mass-flux thruster operating in an aqueous environment. In the absence of freestream flow, averaged thrust increased linearly with frequency, up to a limit imposed by the hardware response time. A simple model was developed that predicts thrust to scale linearly with operating frequency and expelled fluid slug stroke ratio. Thrust decreased with increasing cross flow velocity, and this decrease was linear for the range of frequencies less than or equal to 16 Hz. Thruster performance was diminished when a ventilated cavity was present.