A Configuration to Improve the Aerodynamics and Scope of Can-Annular Combustors

Aerodynamic tests on a novel concept of pre-combustor diffuser, particularly suited to can-annular configurations, are described. These tests show that the new arrangement avoids the unstable flow separations and some of the parasitic pressure losses which can be experienced in more conventional arrangements.

With the benefit of improved flow conditions, it is argued that the can-annular combustor arrangement has many advantages over other configurations, particularly for large engines, and where exhaust gas pollutants must be kept to a minimum.