Trajectory Prediction of Spin-Stabilized Projectiles With a Steady Liquid Payload

Abstract

Payloads that behave like a liquid are carried on board some projectile configurations, and it is well established that the internal motion of a liquid payload can induce destabilizing moments on the projectile. This report creates a method to include the effect of a liquid payload in the flight dynamic equations of motion, enabling trajectory simulations of projectiles with liquid payloads. To include this effect, liquid payload moments are added to the applied loads on the projectile. These loads are computed by solving the linearized Navier-Stokes equations for a projectile undergoing coning motion. To highlight the methodology, trajectory simulation results are provided for an example projectile with different liquid payload configurations possessing stable behavior while one exhibits catastrophic flight instability.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2011
Accession Number
ADA553573

Entities

People

  • Gene R. Cooper

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Angular Motion
  • Aspect Ratio
  • Boundary Layer
  • Computational Fluid Dynamics
  • Coordinate Systems
  • Equations
  • Equations Of Motion
  • Fluid Dynamics
  • Instability
  • Liquid Filled Projectiles
  • Military Research
  • Molecular Dynamics
  • Navier Stokes Equations
  • Projectiles
  • Simulations
  • Steady State
  • Trajectories

Readers

  • Control Systems Engineering.
  • Fluid Dynamics.
  • Unmanned Aerial System (UAS) Autonomous Capabilities and Mission Reconnaissance.