Gas temperature in the trace of water droplets streamlined by hot air flow

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In order to obtain the knowledge necessary for developing new effective fire extinguishing technologies, we determined experimentally the gas temperature in the trace of water droplets streamlined by hot air flow. It was important to establish how much the temperature in the droplet trace decreases and how fast it recovery to the initial temperature field after the droplet evaporation. The following parameters were varied: droplet size from 1.3 mm to 1.7 mm, velocity from 1 m/s to 5 m/s, initial airflow temperature from 473 K to 773 K, number of droplets (one or two), and the arrangement of droplets relative to the hot inflow (serial or parallel). The study proves the theoretical hypothesis about a significant influence of evaporation on the temperature in the water droplet trace. When a temperature trace of water droplets is formed, irrespective of their arrangement, the role of the evaporation process strengthens with the gas flow temperature rising. Furthermore, the study specifies typical longitudinal dimensions of the aerodynamic and temperature traces of water droplets. It has been established that when droplets are located in series and in parallel, their combined impact on the temperature and velocity of the gas flow in the medium differs rather considerably.

Original languageEnglish
Pages (from-to)184-193
Number of pages10
JournalInternational Journal of Multiphase Flow
Volume91
DOIs
Publication statusPublished - 1 May 2017

Fingerprint

high temperature air
air flow
gas temperature
Gases
Water
Air
water
Temperature
evaporation
temperature
gas flow
Evaporation
extinguishing
Flow of gases
aerodynamics
temperature distribution
recovery
Aerodynamics
Fires
Temperature distribution

Keywords

  • Clay particle
  • Evaporation
  • Flowing around
  • High-temperature gases
  • Temperature trace
  • Water droplet

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

Cite this

Gas temperature in the trace of water droplets streamlined by hot air flow. / Kuznetsov, G. V.; Strizhak, P. A.; Volkov, R. S.; Voytkov, Ivan S.

In: International Journal of Multiphase Flow, Vol. 91, 01.05.2017, p. 184-193.

Research output: Contribution to journalArticle

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