Control of Supercavitating Vehicles using Transverse Jets

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 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.

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Document Details

Document Type
Technical Report
Publication Date
Mar 15, 2016
Accession Number
AD1006245

Entities

People

  • Bradley Ayers
  • Hamid Johari

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Composite Images
  • Engineering
  • Flow Fields
  • Flow Visualization
  • Fluid Flow
  • Fluid Mechanics
  • Frequency
  • Froude Number
  • Measurement
  • Mechanical Engineering
  • Mechanics
  • Reynolds Number
  • Square Waves
  • Stratified Fluids
  • Strouhal Number
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Marine Propulsion Engineering and Naval Architecture
  • Robotics and Automation.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster
  • Space - Spacecraft Maneuvers