Effect of turning angle on performance of 2-D turning diffuser via Asymptotic Computational Fluid Dynamics
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-ε ad...
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| Veröffentlicht in: | IOP conference series. Materials Science and Engineering 2017-09, Vol.243 (1), p.12013 |
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| creator | Khong, Y T Nordin, N Seri, S M Mohammed, A N Sapit, A Taib, I Abdullah, K Sadikin, A Razali, M A |
| description | 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-ε 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, Cp and flow uniformity, σout are 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/W1 when 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%. |
| doi_str_mv | 10.1088/1757-899X/243/1/012013 |
| format | Article |
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| subjects | Asymptotic properties Computational fluid dynamics Deviation Diffusers Flow separation Fluid dynamics Mathematical models Pressure recovery |
| title | Effect of turning angle on performance of 2-D turning diffuser via Asymptotic Computational Fluid Dynamics |
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