Evolution of the Allison Model 250 gas turbine engine is traced from model inception to the more recent 250-C28B, C28C and C30 models. The application of advances in compressor, combustor and turbine aerodynamics, coupled with the application of newly developed analytical techniques, has resulted in production engine models with improved performance and a high degree of confidence.Recent aerodynamic and structural advances have permitted the evolution of a single stage 8.5:1 centrifugal compressor from a multi-stage 7:1 axial-centrifugal compressor characteristic of earlier 250 models. This increase in pressure ratio is accomplished without loss of compressor efficiency, resulting in a 6% improvement in SFC.The application of improved analytical techniques also has permitted a more accurate assessment of the stress and vibratory state of recontoured turbine airfoils resulting in reduced losses and increased aerodynamic efficiency.
Evolution of the Allison Model 250 Engine
Sae Technical Papers
Turbine Powered Executive Aircraft Meeting ; 1980
1980-04-01
Aufsatz (Konferenz)
Englisch
ALLISON: AIRCRAFT ENGINE PIONEER
British Library Conference Proceedings | 2003
|Design approach to Allison model 250 engine
Engineering Index Backfile | 1959
|The ALLISON AIRCRAFT-ENGINE DEVELOPMENT
SAE Technical Papers | 1941
|Engineering Index Backfile | 1941
Design approach to Allison model 250 engine
Engineering Index Backfile | 1959
|