Publication detail

Experimental Technique for Heat Transfer Measurements on Fast Moving Sprayed Surfaces

POHANKA, M. BELLEROVÁ, H. RAUDENSKÝ, M.

Czech title

experimentálnáí technika pro měření přenosu tepla na rychle se pohybujích površích

English title

Experimental Technique for Heat Transfer Measurements on Fast Moving Sprayed Surfaces

Type

journal article - other

Language

en

Original abstract

Experimental technique for the measurements of heat transfer distribution at spray cooled surfaces is described. The measurements were done at moving surfaces up to a velocity of 12 m/s. The samples of different cross sections (flat, profile, rail, etc.) can move linearly. Different approaches are used for the measurements of heat transfer coefficient (HTC) distribution or heat flux distribution at rotating cylindrical body. The results of HTC distribution for spray cooling are shown and are compared to water impingement density. Influence of water impingement density, water pressure, spray configuration and surface velocity is studied. Examples for water nozzles and for mist nozzles (water-air) are given. Emulsions and oils are beneficial for some industrial applications of spray cooling. The cooling experiments performed with these liquids provide information about decrease of cooling intensity even for a low concentration of the oils in water. The results comparing the cooling properties of these liquids and their comparison to water are presented.

Czech abstract

Experimentální technika měření distribuce přenosu tepla na površích chlazených ostřikem je prezentována. Měření byla uskutečněna na pohybujících se površích až do rychlosti 12m/s.Emulze a oleje jsou výhodné pro některé průmyslové aplikace u chlazení ostřikem. Výsledky, které srovnávají chladící vlastnosti těchto tekutin a jejich porovnání s vodou jsou zde prezentovány.

English abstract

Experimental technique for the measurements of heat transfer distribution at spray cooled surfaces is described. The measurements were done at moving surfaces up to a velocity of 12 m/s. The samples of different cross sections (flat, profile, rail, etc.) can move linearly. Different approaches are used for the measurements of heat transfer coefficient (HTC) distribution or heat flux distribution at rotating cylindrical body. The results of HTC distribution for spray cooling are shown and are compared to water impingement density. Influence of water impingement density, water pressure, spray configuration and surface velocity is studied. Examples for water nozzles and for mist nozzles (water-air) are given. Emulsions and oils are beneficial for some industrial applications of spray cooling. The cooling experiments performed with these liquids provide information about decrease of cooling intensity even for a low concentration of the oils in water. The results comparing the cooling properties of these liquids and their comparison to water are presented.

Keywords in Czech

přenos tepla, chlazení ostřikem, chladiva

Keywords in English

heat transfer, spray cooling, coolants

RIV year

2009

Released

16.05.2009

Publisher

Journal of ASTME International

Location

US

ISSN

1546-962X

Volume

6

Number

4

Pages from–to

1–9

Pages count

9

BIBTEX


@article{BUT48806,
  author="Michal {Pohanka} and Hana {Bellerová} and Miroslav {Raudenský},
  title="Experimental Technique for Heat Transfer Measurements on Fast Moving Sprayed Surfaces",
  year="2009",
  volume="6",
  number="4",
  month="May",
  pages="1--9",
  publisher="Journal of ASTME International",
  address="US",
  issn="1546-962X"
}