Accession Number:

ADA607614

Title:

Rotorwash Operational Footprint Modeling

Descriptive Note:

Final rept.

Corporate Author:

MISSILE RESEARCH DEVELOPMENT AND ENGINEERING CENTER REDSTONE ARSENAL AL MISSILE GUIDANCE DIRECTORATE

Report Date:

2014-07-01

Pagination or Media Count:

404.0

Abstract:

Wind or rotorwash generated by rotors, ducts, or jets effect the operational suitability and utility of future Vertical Takeoff and Landing VTOL aircraft. As the aircraft s physical size, weight, and disk loading increases beyond the range of current systems, the risk increases that rotorwash operational impacts may compromise an aircraft s ability to satisfy the Warfighters needs. Early definition of anticipated rotorwash conditions will permit an assessment of operational suitability and determine whether specific design changes are warranted andor if acceptable operational tactics, techniques, and procedures can be established. This report documents the assessment process, environmental limits, rotorwash modeling, and output display supporting the rotorwash operational footprint model. These elements graphically combine to display the rotorwash operational impact assessment on the ground environment as contour plots or footprints. The tools developed are for the single main rotor helicopter, tandem helicopter, and tiltrotor configurations, but they can be extended to encompass additional configurations. The rotorwash operational footprint displays the effect of winds generated by rotor thrust on the surrounding environment. These footprints can be used to evaluate compliance with aircraft performance specifications, verify safe separation distances, or inform design trade studies.

Subject Categories:

  • VSTOL
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE