Accession Number:

AD0829876

Title:

EXPERIMENTAL INVESTIGATIONS OF GROUND-JET SUPPRESSION FENCES FOR VTOL AIRCRAFT PREPARED SITES.

Descriptive Note:

Final technical rept. Dec 66-Dec 67,

Corporate Author:

NORTHROP CORP HAWTHORNE CA NORAIR DIV

Personal Author(s):

• Lavi, Rahim
• Rogers, Kenneth H.
• Hall, Gordon R.

Report Date:

1968-04-01

Pagination or Media Count:

147.0

Abstract:

An experimental program was conducted to investigate the effectiveness of ground-jet suppression fences mounted on the periphery of a prepared pad for jet VTOL aircraft in order to reduce the effects of ground erosion and particle entrainment beyond the pad, and thereby reduce the pad size requirement. Small-scale tests of a variety of fence configurations were made using single and dual nozzles. Large-scale tests of the better fence configurations were conducted with a model powered by as many as three J85 engines mounted vertically in a pod. Author

Descriptors:

• *VERTICAL TAKEOFF AIRCRAFT
• *DOWNWASH
• GROUND EFFECT
• SAFETY EQUIPMENT
• LANDING MATS
• STRUCTURES
• INGESTION(ENGINES)
• BLAST
• SUPPRESSORS
• FEASIBILITY STUDIES
• CAPTIVE TESTS
• SOILS
• EROSION
• JET FLOW
• TEST METHODS
• FLOW FIELDS
• CONFIGURATIONS
• TURBOJET EXHAUST NOZZLES
• EXHAUST GASES
• TURBOJET INLETS
• WALLS

Subject Categories:

• VSTOL
• Terminal Flight Facilities
• Structural Engineering and Building Technology
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE