ROTOR INDUCED FLOW FIELDS IN GROUND EFFECT IN THE VICINITY OF A VERTICAL STEP.

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Abstract:

It is the purpose of this analysis to devise a means of theoretically predicting the flow fields induced by hovering rotors in ground effect and influenced by the proximity of a vertical step. A two dimensional investigation is performed. Assuming a perfect fluid allows the problem to be solved using complex potential theory. Values of induced velocities and stream function are determined by considering the contributions of a finite number of discreet vortices and their images in the transformed plane. Results appear to be qualitatively accurate within the confines of the wake cylinder and in areas very close to the wake boundaries. Author

Author(s):
Migliore, Paul G.
Author Organization(s):
WEST VIRGINIA UNIV MORGANTOWN DEPT OF AEROSPACE ENGINEERING
Descriptive Note:
Scientific rept. for Jul-Dec 68,
Pagination:
0085

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-12
Contract/Grant Number(s):
N00014-68-A-0512
Project Number(s):
NR-215-163
 Subject Terms
Communities of Interest:
Air Platforms
Descriptor(s):
(*HELICOPTER ROTORS, *HOVERING), (*GROUND EFFECT, HELICOPTER ROTORS), FLOW FIELDS, AERODYNAMIC CONFIGURATIONS, INCOMPRESSIBLE FLOW, VORTICES, HELICOPTERS, COMPUTER PROGRAMS, MATHEMATICAL PREDICTION
Field(s)/Group(s):
Aerodynamics, Helicopters
Keyword(s):
STEP CONFIGURATION
Report Date:
1969 Jan 01