Technical Description and User Notes for LDTRAN/CB Code Used in the Chemical Agent Deposition Analysis for Rotorcraft Surfaces (CADARS) Model

Abstract

The development of a chemical agent challenge-level model for current and future U.S. Army rotorcraft requires both a cloud dispersion model and a sophisticated helicopter aerodynamic effects model. Since the U.S. Army Research Laboratory (ARL) currently possesses chemical-biological (CB) agent cloud generator and dispersion tracking models, this project focused on modeling the rotor wake and airframe interaction with the CB cloud and the deposition of the CB material on the rotorcraft surfaces. The RotorCRAFT/interactional aerodynamics (RC/IA) code was previously developed under the sponsorship of the U.S. Army Small Business Innovative Research (SBIR) program to provide detailed analysis of steady and unsteady airframe loading attributable to helicopter rotor wake-fuselage interactions. The general aim of the effort outlined here was to tailor the RC/IA code to the modeling requirements of rotor-chemical cloud interaction analysis. The work to date has led to the development of the computer code, Lagrangian Deposition and Trajectory ANalysis/Chemical-Biological (LDTRAN/CB), described in this report. The code is the basis of the Chemical Agent Deposition Analysis for Rotorcraft Surfaces (CADARS) model. The CADARS model is a state-of-the-art chemical agent challenge-level predictive system which can be used to efficiently analyze realistic operational scenarios while capturing physically important rotor wash effects. The particular aircraft that has been the focus of work to date has been the U.S. Army RAH-66 Comanche helicopter, although the modeling methods can be extended to analyze any aircraft in the U.S. Army inventory. The biological agent hazards portion of the CADARS model is presently not included in this version.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1997
Accession Number
ADA326443

Entities

People

  • Joseph A. Andrese
  • Milton E. Teske
  • Robert M. Mckillip
  • Thomas B. Curbishley
  • Todd R. Quackenbush

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Army Aircraft
  • Boundary Layer
  • C Programming Language
  • Chemical Warfare Agents
  • Computational Fluid Dynamics
  • Computer Programming
  • Computer Programs
  • Computers
  • Databases
  • Flow Fields
  • Fluid Dynamics
  • Grids
  • Operating Systems
  • Stratified Fluids

Readers

  • Computational Fluid Dynamics (CFD)
  • Critical Infrastructure Protection in CBRN and WMD Threats.
  • Military Engineering.