Application of Large Eddy Simulation to Cooling and Flow Problems in Aeropropulsion Systems
Abstract
The primary objective of this research was to develop and apply large eddy simulation (LES) technology to some urgent flow and heat transfer problems in propulsion systems and to contribute to the physical understanding of such flows. The work was motivated by the observation that the design goals of high specific power and thrust and low specific fuel consumption have been reached, in part, by an increase in turbine inlet temperature and future improvements in engine efficiency will place even greater demands on blade cooling procedures. However, current design codes are somewhat limited in accuracy due to uncertainty associated with modeling for turbulent flow. The research was concerned with both the film cooling of external blade surfaces and the complex flows in internal cooling passages. Studies have been completed of the effects of rotation on the heat transfer and flow in smooth and ribbed channels and in a duct of square cross-section. A scheme was developed for including the effects of freestream turbulence on boundary layer development. Preliminary LES results have been obtained for a single hole film cooling configuration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 29, 2004
- Accession Number
- ADA427062
Entities
People
- Joon Lee
- Kunlun Liu
- Richard H. Pletcher
- Zhaohui Qin
Organizations
- Iowa State University