DESIGN OF AN AIR SUPPLY SYSTEM AND TEST SECTION FOR RESEARCH ON SCAVENGING SYSTEMS FOR PROPULSION WIND TUNNELS

摘要

This report presents a description of the design, construction, and operational features of an air supply system designed to drive supersonic or transonic test sections of approximately one square foot in area. The facility has been made adaptable to experimental studies of scavenging systems and their interaction with the diffuser geometry by providing the test section with porous walls to avoid wall interference caused by the relatively long model configurations and an adjustable diffuser to account for losses from the scavenging scoop. In addition the diffuser can be completely replaced when special requirements on scavenging-scoop size calls for extreme changes in diffuser geometry. Components and component systems, including the pressurized shell, diffuser-ejector, instrumentation, air drying system, lubrication system, cooling system, electrical control system, and supersonic and transonic test sections are discussed from the standpoint of design requirements, and the factors which influenced the choice of system are given. The basic engineering design analyses as well as operating performance data based on preliminary test calibrations are also included.