Title :
Influence of Rib Angle on the Flow Field and Cooling Characteristics of Film Cooling with Crossflow
Author :
Li Chun-lin ; Zhu Hui-ren ; Du Xiao-qin ; Zhou Lei-sheng
Author_Institution :
Sch. of Power & Energy, Northwestern Polytech. Univ, Xi´an, China
Abstract :
Numerical simulation was carried out to investigate the flow field and film cooling characteristics of a single cylindrical hole with crossflow and rib turbulators in the coolant supply channel. Three-dimension N-S equations were solved with unstructured mesh and realizable k-¿ model. The effect of three kinds of rib angles (60°, 90°and 120°) on the flow field and film cooling effectiveness is studied. The results show that the flow field becomes complicated because of crossflow and ribs. And the flow structures in the film-cooling hole and in the hole exit are controlled by the angle of ribs, which also changes the distribution of film cooling effectiveness on outer surface. The film cooling effectiveness appears to be the highest at rib angle 120°, and the lowest at 90° rib angle.
Keywords :
Navier-Stokes equations; blades; cooling; flow simulation; gas turbines; numerical analysis; 3D N-S equations; coolant supply channel; crossflow; film cooling characteristics; flow field; numerical simulation; realizable k-?‚?? model; rib angle; rib turbulators; single cylindrical hole; unstructured mesh; Blades; Coolants; Cooling; Equations; Heat transfer; Mesh generation; Numerical simulation; Ribs; Temperature; Turbines; cooling effectiveness; crossflow channel; film cooling; numerical simulation; rib;
Conference_Titel :
Energy and Environment Technology, 2009. ICEET '09. International Conference on
Print_ISBN :
978-0-7695-3819-8
DOI :
10.1109/ICEET.2009.52
