Design of an Infrared Signature Suppressor for the Bell 205 (UH-1H) Helicopter Part I: Aerothermal Design

摘要

This paper describes the development of an engine exhaust IR suppressor for the Bell 205 helicopter. The design methodology of combined computer analysis and scale model testing was applied to produce a final aerothermal shape that met performance requirements. Prototypes were later built and tested in an engine test cell, and inflight on a Bell 205. Results from these prototype tests are discussed in the companion paper "Part II - Engine & Flight Testing", submitted to the 11th CASI Propulsion Symposium.