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Title: Exponential wake structure of heated turbulent boundary layers at elevated levels of free-stream turbulence

Abstract

The wake region of a turbulent boundary layer is demonstrated to exhibit simple exponential behavior at elevated levels of free-stream turbulence (FST). As a predictive tool, the computer code STANCOOL has been modified to include FST effects in heated turbulent boundary layers. Preliminary comparisons with experimental data indicate improvements in computational capabiity, although futher development of the code is required. From these comparisons, three new results are offered: (1) At elevated levels of FST, several statistical profiles in the boundary layer wake region decay exponentially into the free stream; (2) {ovr v{prime}T{prime}} decays at half the rate of the mean velocity and temperature; (3) analytical expressions are provided for {ovr u{prime}v{prime}} and {ovr v{prime}T{prime}} in this case.

Authors:
 [1]
  1. Univ. of Oklahoma, Norman (United States)
Publication Date:
OSTI Identifier:
6018795
Resource Type:
Journal Article
Journal Name:
Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)
Additional Journal Information:
Journal Volume: 109:2; Journal ID: ISSN 0022-1481
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; TURBULENT FLOW; MATHEMATICAL MODELS; BOUNDARY LAYERS; DATA; S CODES; TEMPERATURE EFFECTS; COMPUTER CODES; FLUID FLOW; INFORMATION; LAYERS; 420400* - Engineering- Heat Transfer & Fluid Flow

Citation Formats

Sepri, P. Exponential wake structure of heated turbulent boundary layers at elevated levels of free-stream turbulence. United States: N. p., 1987. Web. doi:10.1115/1.3248085.
Sepri, P. Exponential wake structure of heated turbulent boundary layers at elevated levels of free-stream turbulence. United States. https://doi.org/10.1115/1.3248085
Sepri, P. 1987. "Exponential wake structure of heated turbulent boundary layers at elevated levels of free-stream turbulence". United States. https://doi.org/10.1115/1.3248085.
@article{osti_6018795,
title = {Exponential wake structure of heated turbulent boundary layers at elevated levels of free-stream turbulence},
author = {Sepri, P},
abstractNote = {The wake region of a turbulent boundary layer is demonstrated to exhibit simple exponential behavior at elevated levels of free-stream turbulence (FST). As a predictive tool, the computer code STANCOOL has been modified to include FST effects in heated turbulent boundary layers. Preliminary comparisons with experimental data indicate improvements in computational capabiity, although futher development of the code is required. From these comparisons, three new results are offered: (1) At elevated levels of FST, several statistical profiles in the boundary layer wake region decay exponentially into the free stream; (2) {ovr v{prime}T{prime}} decays at half the rate of the mean velocity and temperature; (3) analytical expressions are provided for {ovr u{prime}v{prime}} and {ovr v{prime}T{prime}} in this case.},
doi = {10.1115/1.3248085},
url = {https://www.osti.gov/biblio/6018795}, journal = {Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)},
issn = {0022-1481},
number = ,
volume = 109:2,
place = {United States},
year = {Fri May 01 00:00:00 EDT 1987},
month = {Fri May 01 00:00:00 EDT 1987}
}