NUMERICAL SIMULATION OF 3D VISCOUS FLOW FIELD

 IN TURBOMACHINERY WITH CURVED BLADES

Zhang Yangying  Su Jiexian  Wu Meng

(Harbin Institute of Technology)

Cui Minggen

(Harbin Institute of Technology)

Abstract: The implicit method which has second order accuracy in the time and space is proposed. Using the method, the 3D steady viscous flow field in turbomachinery with curved blades is simulated. The various shock waves and vortexes are captured. Through the comparison of vortex structure in straight cascade, another main reason of loss decreasing in positively curved cascade is found. That is the passage vortex which play an important role in secondary flow can be limited in a stable range in positively curved cascade.

Key words: Flow field  Curved blade  TVD  Scheme  Passage vortex  Implicit method
CLC No: TK14
国家自然科学基金资助项目. Received 20000704, received in revised form 20000925