Affiliation:
1. Research Engineer e-mail:
2. Lecturer e-mail:
3. Professor e-mail: Division of Energy and Sustainability, The University of Nottingham, Nottingham NG7 2RD, UK
Abstract
The turbulent flow through a 3D diffuser featuring a double expansion is investigated using computational fluid dynamics. Time dependent simulations are reported using the stress omega Reynolds stress model available in ANSYS FLUENT 13.0. The flow topography and characteristics over a range of Reynolds numbers from 42,000 to 170,000 is reported, and its features are consistent with those investigated for other similar geometries. A transition from a chaotic separated flow to one featuring one large recirculation in one corner of the diffuser is predicted at a Reynolds number of 80,000. For a Reynolds number of 170,000 a precessing/flapping motion of the main flow field was identified, the frequency of which is consistent with other numerical and experimental studies.
Reference31 articles.
1. An Axisymmetric ‘Fluidic’ Nozzle to Generate Jet Precession;J. Fluid Mech.,1998
2. A 1/4 Scale Test Facility for PF Transport in Power Station Pipelines;Fuel,2004
3. Patrick, W. P., and McCormick, D. C., 1988, “Laser Velocimeter and Total Pressure Measurements in Circular-to-Rectangular Transition Ducts,” United Technologies Research Center, Tech. Report 87.
4. Flow Distortion in a Circular-to-Rectangular Transition Duct;AIAA J.,1990
5. Experimental Investigation of Turbulent Flow Through a Circular-to-Rectangular Transition Duct;AIAA J.,1992
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献