Heat transfer to the wall of end gas side during propagation of premixed flame in a closed vessel (heat flux measurements by both interference image analysis and thin surface thermocouple methods)

Yoshisuke Hamamoto, Eiji Tomita, Masaki Yamanaka, Motoshi Kataoka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

It is very important to know the heat flux to a wall in order to understand the unsteady heat transfer in the combustion chamber. In this study, a fuel-air mixture was ignited at the center of a constant-volume vessel and the heat flux was determined from change of the temperature distribution in the boundary layer near the wall of the end gas side by analysing the interference image. The value of the heat flux was compared to that from a thin surface coaxial thermocouple with high response. It was found that before the flame arrives at the wall, the heat transfer is smaller than the thermal radiation from the flame, and the temperature of unburned gas changes nearly adiabatically. After the flame reaches the wall, the heat flux due to the temperature gradient becomes larger than that from the thermal radiation.

Original languageEnglish
Pages (from-to)2342-2348
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume61
Issue number586
Publication statusPublished - Jun 1995
Externally publishedYes

Fingerprint

premixed flames
thermocouples
Thermocouples
image analysis
Image analysis
vessels
Heat flux
heat flux
heat transfer
Heat transfer
interference
flames
propagation
Heat radiation
thermal radiation
Gases
gases
combustion chambers
Combustion chambers
Thermal gradients

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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abstract = "It is very important to know the heat flux to a wall in order to understand the unsteady heat transfer in the combustion chamber. In this study, a fuel-air mixture was ignited at the center of a constant-volume vessel and the heat flux was determined from change of the temperature distribution in the boundary layer near the wall of the end gas side by analysing the interference image. The value of the heat flux was compared to that from a thin surface coaxial thermocouple with high response. It was found that before the flame arrives at the wall, the heat transfer is smaller than the thermal radiation from the flame, and the temperature of unburned gas changes nearly adiabatically. After the flame reaches the wall, the heat flux due to the temperature gradient becomes larger than that from the thermal radiation.",
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T1 - Heat transfer to the wall of end gas side during propagation of premixed flame in a closed vessel (heat flux measurements by both interference image analysis and thin surface thermocouple methods)

AU - Hamamoto, Yoshisuke

AU - Tomita, Eiji

AU - Yamanaka, Masaki

AU - Kataoka, Motoshi

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N2 - It is very important to know the heat flux to a wall in order to understand the unsteady heat transfer in the combustion chamber. In this study, a fuel-air mixture was ignited at the center of a constant-volume vessel and the heat flux was determined from change of the temperature distribution in the boundary layer near the wall of the end gas side by analysing the interference image. The value of the heat flux was compared to that from a thin surface coaxial thermocouple with high response. It was found that before the flame arrives at the wall, the heat transfer is smaller than the thermal radiation from the flame, and the temperature of unburned gas changes nearly adiabatically. After the flame reaches the wall, the heat flux due to the temperature gradient becomes larger than that from the thermal radiation.

AB - It is very important to know the heat flux to a wall in order to understand the unsteady heat transfer in the combustion chamber. In this study, a fuel-air mixture was ignited at the center of a constant-volume vessel and the heat flux was determined from change of the temperature distribution in the boundary layer near the wall of the end gas side by analysing the interference image. The value of the heat flux was compared to that from a thin surface coaxial thermocouple with high response. It was found that before the flame arrives at the wall, the heat transfer is smaller than the thermal radiation from the flame, and the temperature of unburned gas changes nearly adiabatically. After the flame reaches the wall, the heat flux due to the temperature gradient becomes larger than that from the thermal radiation.

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