Effects of Free Stream Turbulence on Heat Transfer
Abstract
The Report presents the research (including relevant publications) undertaken at Purdue University and, under subcontract, at Imperial College, London, on analytical-computational and experimental studies on the determination of the influence of inhomogeneous and isotropic turbulence on boundary layers, including cases with heat transfer. The modelling of the influence of Free Stream Turbulence on boundary layer turbulence (BLT) has been based on the so-called large eddy interaction hypothesis, wherein the interaction between a representative large eddy and all of the eddies is related to a skewness factor and a damping factor. The boundary layer is divided into four asymptotically matched regions, including the free stream, and the flowfield is calculated based on the necessary (as proved herein) assumption of the existence of a logarithmic law region adjoining the wall viscous region. A detailed comparison between the experimental data Hancock and Bradshaw and the predictions obtained for the same case of interaction between FST and BLT is a fully-developed TBL is presented and provides substantial credibility to the method of approach. The experimental work at Imperial College has been devoted to a study of the effects of anisotropic FST on heat transfer in low speed TBL. (kr)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 28, 1990
- Accession Number
- ADA228920
Entities
People
- P. Bradshaw
- S. N. Murthy
Organizations
- Purdue University