Publication detail
Experimental investigation of heat transfer between hot air nozzle flow and cylinder
ZAHRADNÍK, R. KOTRBÁČEK, P. BOHÁČEK, J.
Czech title
Experimentální pozorování přestupu tepla mezi horkým vzduchem a válcem
English title
Experimental investigation of heat transfer between hot air nozzle flow and cylinder
Type
conference paper
Language
en
Original abstract
A variety of experimental measurements were performed to clarify the influence of air pressure and distance from a nozzle outlet on the heat transfer intensity between a cylinder's surface and the hot air flowing around the cylinder ,which is placed in a rectangular air channel. The surface temperatures of five different surface points and air temperatures are recorded during each experiment. The heat transfer coefficient is calculated from the following recorded parameters: air temperature, calculated surface temperature, and heat flux. The surface temperature and the heat flux are obtained from finite element analyses using ANSYS. The boundary conditions for these analyses are taken from the temperature history records. Three different values of air pressures and distances are tested. The distribution of the heat transfer coefficient around the cylindrical surface is determined for these testing conditions. Results are presented in the form of graphs.
Czech abstract
Byla provedena sada experimentů s cílem objasnit vliv tlaku vzduchu a vzdáleností ústí trysky na intenzitu přenosu tepla mezi proudícím horkým vzduchem a válcem, který je umístěn v obdélníkovém vzduchovém kanále. Během těchto experimentů byla zaznamenána povrchová teplota válce v 5 místech. Součinitel přestupu tepla je vypočítávám z těchto zaznamenaného parametru teplota vzduchu a dopočítané povrchové teploty a tepelného toku. Povrchové teploty a tepelný tok jsou získány z analýzy metodou konečných prvků ze systému ANSYS. Okrajové podmínky pro výpočet jsou převzaty ze záznamů experimentů. Testovány byly 3 různé tlaky a 3 různé vzdálenosti. Distribuce součinitele přestupu tepla jsou stanoveny pro všechny kombinace těchto podmínek. Výsledky jsou prezentovány formou grafů.
English abstract
A variety of experimental measurements were performed to clarify the influence of air pressure and distance from a nozzle outlet on the heat transfer intensity between a cylinder's surface and the hot air flowing around the cylinder ,which is placed in a rectangular air channel. The surface temperatures of five different surface points and air temperatures are recorded during each experiment. The heat transfer coefficient is calculated from the following recorded parameters: air temperature, calculated surface temperature, and heat flux. The surface temperature and the heat flux are obtained from finite element analyses using ANSYS. The boundary conditions for these analyses are taken from the temperature history records. Three different values of air pressures and distances are tested. The distribution of the heat transfer coefficient around the cylindrical surface is determined for these testing conditions. Results are presented in the form of graphs.
Keywords in Czech
součinitel přenosu tepla, ANSYS, HTC distribuce; válec; proud horký vzduch;
Keywords in English
heat transfer coefficient; ANSYS, HTC distribution, cylinder, hot air flow
RIV year
2011
Released
22.11.2011
Location
Jičín
ISBN
978-80-7372-784-0
Book
Experimental fluid Mechanics 2011
Edition number
1
Pages from–to
1059–1064
Pages count
6
BIBTEX
@inproceedings{BUT75362,
author="Radek {Zahradník} and Petr {Kotrbáček} and Jan {Boháček},
title="Experimental investigation of heat transfer between hot air nozzle flow and cylinder",
booktitle="Experimental fluid Mechanics 2011",
year="2011",
month="November",
pages="1059--1064",
address="Jičín",
isbn="978-80-7372-784-0"
}