Chimera grids in the simulation of three-dimensional flowfields in turbine-blade-coolant passagesWhen computing flows inside geometrically complex turbine-blade coolant passages, the structure of the grid system used can affect significantly the overall time and cost required to obtain solutions. This paper addresses this issue while evaluating and developing computational tools for the design and analysis of coolant-passages, and is divided into two parts. In the first part, the various types of structured and unstructured grids are compared in relation to their ability to provide solutions in a timely and cost-effective manner. This comparison shows that the overlapping structured grids, known as Chimera grids, can rival and in some instances exceed the cost-effectiveness of unstructured grids in terms of both the man hours needed to generate grids and the amount of computer memory and CPU time needed to obtain solutions. In the second part, a computational tool utilizing Chimera grids was used to compute the flow and heat transfer in two different turbine-blade coolant passages that contain baffles and numerous pin fins. These computations showed the versatility and flexibility offered by Chimera grids.
Document ID
19930066283
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Stephens, M. A. (NASA Lewis Research Center Cleveland, OH, United States)
Rimlinger, M. J. (NASA Lewis Research Center Cleveland, OH, United States)
Shih, T. I.-P. (Carnegie Mellon Univ. Pittsburgh, PA, United States)
Civinskas, K. C. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 93-2559
Meeting Information
Meeting: AIAA, SAE, ASME, and ASEE, Joint Propulsion Conference and Exhibit