Accession Number:

AD0251154

Title:

STUDY OF THE VTOL DOWNWASH IMPINGEMENT PROBLEM

Descriptive Note:

Corporate Author:

CORNELL AERONAUTICAL LAB INC BUFFALO NY

Personal Author(s):

• WHITE, JR., RICHARD P.
• VIDAL, ROBERT J.

Report Date:

1960-12-01

Pagination or Media Count:

63.0

Abstract:

Intensive review and analysis were given the problems associated with dust and debris entrainment in the downwash of helicopters and other VTOL configurations during near ground operations. A review is presented of present knowledge concerning the nature of downwash impingement. A list and brief description are given of suggested programs which have one of the following objectives 1 to obtain a better understanding of the problem, 2 to investigate ideas that have been proposed to reduce the entrainment and detrimental effects of particles, and 3 to investigate ideas that have been proposed for avoiding entrainment of objects by the downwash. A series of investigations are presented that are recommended to accomplish one or more of the above objectives.

Descriptors:

• *DOWNWASH
• *VERTICAL TAKEOFF AIRCRAFT
• BOUNDARY LAYER
• GAS TURBINES
• DETONATION WAVES
• AIR FILTERS
• LANDING MATS
• GROUND EFFECT
• PARTICLES
• PRESSURE
• JET FLOW

Subject Categories:

• VSTOL
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE