Accession Number : ADP005889

Title :   Experimental Investigation of Hover Flowfields in Water at the McDonnell Douglas Research Laboratories,

Corporate Author : MCDONNELL DOUGLAS RESEARCH LABS ST LOUIS MO

Personal Author(s) : Saripalli, K. R. ; Kroutil, J. C. ; Van Horn, J. R.

Report Date : JUN 1987

Pagination or Media Count : 10

Abstract : The Hover Research Facility, a new experimental facility, is designed to study the flowfields generated by hovering VTOL aircraft and helicopters. Water is used as the working medium because of its inherent advantages in flow visualization and laser Doppler velocimeter (LDV) measurements. Applications of the HRF include: (1) experimental investigation of twin-jet impingement flow with application to VTOL aircraft; (2) visualization of the flowfield around a fully contoured, model supersonic fighter/attack short-take-off and vertical landing (STOVL) aircraft; and (3) performance testing of a No Tail Rotor (NOTAR) helicopter in hover mode by use of a scaled model. Flow-visualization and quantitative LDV data on these experiments are presented.

Descriptors :   *HOVERING, *FLOW FIELDS, JET FLOW, AERODYNAMIC LIFT, VERTICAL TAKEOFF AIRCRAFT, HELICOPTERS, SHORT TAKEOFF AIRCRAFT, VERTICAL LANDINGS, SUPERSONIC AIRCRAFT, WATER, FLOW VISUALIZATION, LASER VELOCIMETERS, SCALE MODELS.

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE