Effect of turning angle on performance of 2-D turning diffuser via Asymptotic Computational Fluid Dynamics

2nd International Conference on Computational Fluid Dynamics in Research and Industry

力学;计算机科学;工业技术

Khong, Y.T.^1 ; Nordin, N.^1 ; Seri, S.M.^1 ; Mohammed, A.N.^1 ; Sapit, A.^1 ; Taib, I.^1 ; Abdullah, K.^1 ; Sadikin, A.^1 ; Razali, M.A.^1

Flow Analysis, Simulation and Turbulence Research Group, Center for Energy and Industrial Environment Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Malaysia^1

关键词: Flow uniformity;    Inner walls;    Performance correlation;    Pressure recovery;    Turning angles;    Wall treatment;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/243/1/012013/pdf
DOI  :  10.1088/1757-899X/243/1/012013

来源: IOP

【 摘 要 】

The present work aims to numerically investigate the effect of varying turning angle, φ = 30° - 90° on the performance of 2-D turning diffuser and to develop the performance correlations via integrating the turning angle using Asymptotic Computational Fluid Dynamics (ACFD) technique. Standard k- adopting enhanced wall treatment of y+≈ 1.1 appeared as the best validated model to represent the actual cases with deviation of ±4.7%. Results show that the pressure recovery, Cpand flow uniformity, σoutare distorted of respectively 37% and 28% with the increment of turning angle from 30° to 90°. The flow separation starts to emerge within the inner wall, S=0.91Lin/W1when 45° turning diffuser is applied and its scale is enlarged by further increasing the turning angle. The performance correlations of 2-D turning diffuser are successfully developed with deviation to the full CFD solution approximately of ±7.1%.