Accession Number : AD0772665

Title :   Equilibrium Characteristics of a Distributed Peripheral Jet.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Gorman,Dennis M.

Report Date : MAR 1970

Pagination or Media Count : 57

Abstract : An experimental investigation of the equilibrium characteristics of a distributed peripheral jet as found in an air cushion landing system is described. The parameters measured were pressure ratio, trunk shape, jet height, and flow rate. Test runs were made at trunk pressures of 40, 60, 80, 100, 120, and 140 psfg, and for jet heights from 0.17 to 1.0 inch. The cushion to trunk pressure ratio was found to be a function of jet height only; the jet height magnitude was only approximately 10 per cent of that predicted by momentum theories of flow. The jet height data agrees well with a modified plenum-chamber theory of flow which is proposed. The pressure ratio, jet height, and trunk shape remain constant for any vehicle height as the flow rate is varied. (Author)

Descriptors :   *Air cushion vehicles, *Landing aids, *Control jets, Jet flow, Ducts, Landing gear, Ground effect, Theses

Subject Categories : Surface Effect Vehicles & Amphibious Vehicles

Distribution Statement : APPROVED FOR PUBLIC RELEASE