Accession Number : AD0776318

Title :   Free Jet Engine Testing: Wind Tunnel Starting,

Corporate Author : AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Ortwerth,Paul J.

Report Date : DEC 1973

Pagination or Media Count : 33

Abstract : Free jet wind tunnels are used extensively for jet engine testing and development. A facility diffuser is employed for altitude simulation. Diffuser size and performance must be matched to the exhauster pumping capacity and engine installation drag or diffuser unstarts will occur. The diffuser starting theory of Rudolf Herman was reviewed and extended to determine the allowable drag coefficient of ramjet test installations in free jet wind tunnels. Specific drag limits are calculated for the Air Force free jet test stand located at The Marquardt Corporation, Van Nuys, California. (Author)

Descriptors :   *Wind tunnels, *Diffusers, Jet engines, Test equipment, Fluid dynamics, Aerodynamic drag, Starting

Subject Categories : Test Facilities, Equipment and Methods
      Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE