Effect of hydrated salt additives on film boiling behavior at vapor film collapse

Takahiro Arai, Masahiro Furuya

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A high-temperature stainless steel sphere was immersed into various salt solutions to investigate film boiling behavior at vapor film collapse. The film boiling behavior around the sphere was observed with a high-speed digital-video camera. Because the salt additives enhance the condensation heat transfer, the observed vapor film was thinner. The surface temperature of the sphere was measured. Salt additives increased the quenching (vapor film collapse) temperature because the frequency of direct contact between the sphere surface and the coolant increased. Quenching temperature increases with increased salt concentration. The quenching temperature, however, approaches a constant value when the salt concentration is close to its saturation concentration. The quenching temperature is well correlated with ion molar concentration, which is a number density of ions, regardless of the type of hydrated salts.

Original languageEnglish
Article number012902
JournalJournal of Engineering for Gas Turbines and Power
Volume131
Issue number1
DOIs
Publication statusPublished - 2009 Jan 1

Keywords

  • Film boiling
  • Hydrated salt
  • Quenching temperature
  • Vapor film

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Fuel Technology
  • Aerospace Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

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