NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Role of secondary instability theory and parabolized stability equations in transition modelingIn modeling the laminar-turbulent transition region, the designer depends largely on benchmark data from experiments and/or direct numerical simulations that are usually extremely expensive. An understanding of the evolution of the Reynolds stresses, turbulent kinetic energy, and quantifies in the transport equations like the dissipation and production is essential in the modeling process. The secondary instability theory and the parabolized stability equations method are used to calculate these quantities, which are then compared with corresponding quantities calculated from available direct numerical simulation data for the incompressible boundary-layer flow of laminar-turbulent transition conditions. The potential of the secondary instability theory and the parabolized stability equations approach in predicting these quantities is discussed; results indicate that inexpensive data that are useful for transition modeling in the early stages of the transition region can be provided by these tools.
Document ID
19930057055
Document Type
Conference Paper
Authors
El-Hady, Nabil M. (NASA Langley Research Center Hampton, VA, United States)
Dinavahi, Surya P. (Analytical Services and Materials, Inc. Hampton, VA, United States)
Chang, Chau-Lyan (High Technology Corp. Hampton, VA, United States)
Zang, Thomas A. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Subject Category
FLUID MECHANICS AND HEAT TRANSFER
Report/Patent Number
AIAA PAPER 93-2908
Meeting Information
AIAA, Fluid Dynamics Conference(Orlando, FL)
Funding Number(s)
CONTRACT_GRANT: NAS1-19299
CONTRACT_GRANT: NAS1-19320
Distribution Limits
Public
Copyright
Other