A comparison of three algebraic stress closures for combustor flow calculationsA comparison is made of the performance of two locally nonequilibrium and one equilibrium algebraic stress closures in calculating combustor flows. Effects of four different pressure-strain models on these closure models are also analyzed. The results show that the pressure-strain models have a much greater influence on the calculated mean velocity and turbulence field than the algebraic stress closures, and that the best mean strain model for the pressure-strain terms is that proposed by Launder, Reece and Rodi (1975). However, the equilibrium algebraic stress closure with the Rotta return-to-isotropy model (1951) for the pressure-strain terms gives as good a correlation with measurements as when the Launder et al. mean strain model is included in the pressure-strain model. Finally, comparison of the calculations with the standard k-epsilon closure results show that the algebraic stress closures are better suited for simple turbulent flow calculations.
Document ID
19860053650
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nikjooy, M. (Arizona State Univ. Tempe, AZ, United States)
So, R. M. C. (Arizona State University Tempe, United States)
Hwang, B. C. (David W. Taylor Naval Ship Research and Development Center Annapolis, MD, United States)