Two - and Three - Dimensional Turbine Blade Row Flow Field Simulations

A major problem area a s s o c i a t e d w i t h t h e swcess fu L d e s i g n and o p e r a t i on of modern gas t u r b i n e e n g i n e s is t h e t u r b i n e . This s e c t i o n r e p r e s e n t s a c o n s i d e r a b l e cha1 Lenge t o both t h e d e s i g n and r e s e a r c h e n g i n e e r as i t c o n t a i n s s i g n i f i c a n t r e g i o n s of complex three-dimensional f lows which i n c l u d e b o t h aez-odynami c and h e a t t r a t i s f e r phenomena. 4s a r e s u l t , t h e t u r b i n e s e c t i o n has been t h e o b j e c t of e x t e n s i v e i n v e s t i g a t i o n v i a both a n a l y s i s and experiment . The present paper d i s c u s s e s work performed t o d a t e by S c i e n t i f i c Research A s s o c i a t e s under the NASA HOST program i n t h e nuiaeri c a l s i millation of t u rb i n e pas sage f lows v i a a Navier-Stokes appproach. The pape r is a summation of t he work performed between 1984 and 1987. Th i s work i n c l u d e s bo th l amina r and tc l rbulent s i m u l n t i o n s in both two and t h r e e dimensions. An o u t l i n e of t he approach and background as w e l l as an overview of t h e results fo l low.