Accession Number : AD1006241


Title :   Control of Supercavitating Vehicles using Transverse Jets


Descriptive Note : Technical Report,15 Jun 2013,15 Dec 2015


Corporate Author : California State University - Northridge, Mechanical Engineering Department Northridge United States


Personal Author(s) : Ayers , Bradley ; Johari,Hamid


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1006241.pdf


Report Date : 15 Mar 2016


Pagination or Media Count : 53


Abstract : 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 crossflow 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.


Descriptors :   underwater vehicles , marine thrusters , maneuvers , experimental design , free stream


Subject Categories : Marine Engineering
      Marine Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE