A two-thermocouples probe for radiation corrections of measured temperatures in compartment fires

Brohez, Sylvain; Delvosalle, Christian; Marlair, Guy

doi:10.1016/j.firesaf.2004.03.002

Cited by 183 publications

(81 citation statements)

References 6 publications

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“…Such a correction concerns the solution of a heat transfer balance equation (see e.g. [15]). For the configuration at hand, with the thermocouples mounted a few cm below the ceiling, this is not a straightforward task.…”

Section: Simulations Of Full-scale Experimentsmentioning

confidence: 99%

Smoke control in case of fire in a large car park: CFD simulations of full-scale configurations

Deckers

Haga

Tilley

et al. 2013

Fire Safety Journal

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Section: Simulations Of Full-scale Experimentsmentioning

confidence: 99%

Smoke control in case of fire in a large car park: CFD simulations of full-scale configurations

Deckers

Haga

Tilley

et al. 2013

Fire Safety Journal

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“…Aspirated TCs are a proven method of reducing radiation errors but introduce significant disturbances to the flow field. A two-TC methodology for reducing radiation errors has been proposed by Brohez et al [2004] but remains unproven. The Penlight tests of this report will apply the two-TC methodology and/or an aspirated TC, which will have the secondary benefit of providing an opportunity to evaluate the usefulness of the two-TC technique in practical applications.…”

Section: Convective Flow Temperature Measurements In Penlightmentioning

confidence: 99%

“…By using two TCs of different sizes, an estimate of the radiation error can be obtained and thus a means of extrapolating the temperature back to what would be measured by a hypothetical TC that was not subject to radiation errors [Brohez et al, 2004]. This technique was not recommended by Pitts et al [1999] for use in fluctuating temperature or radiation fields due to the finite time response of the TCs.…”

Section: Radiation Correction For Two Tcs Of Different Sizesmentioning

confidence: 99%

“…Brohez et al [2004] utilized a correlation for spheres appropriate for bare bead TCs. For the present work, the MIMS TCs can be approximated as isothermal cylinders in cross flow.…”

Section: Radiation Correction For Two Tcs Of Different Sizesmentioning

confidence: 99%

“…(2.5)) developed by Brohez [2004] can be derived from Eq. (2.4) using the steady-state balance of Eq.…”

Section: Radiation Correction For Two Tcs Of Different Sizesmentioning

confidence: 99%

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Validation experiments to determine radiation partitioning of heat flux to an object in a fully turbulent fire.

Blanchat¹,

O’Hern

Kearney

et al. 2006

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It is necessary to improve understanding and develop validation data of the heat flux incident to an object located within the fire plume for the validation of SI-ERRA/FUEGO/SYRINX fire and SIERRA/CALORE. One key aspect of the validation data sets is the determination of the relative contribution of the radiative and convective heat fluxes. To meet this objective, a cylindrical calorimeter with sufficient instrumentation to measure total and radiative heat flux had been designed and fabricated. This calorimeter will be tested both in the controlled radiative environment of the Penlight facility and in a fire environment in the FLAME/Radiant Heat (FRH) facility.Validation experiments are specifically designed for direct comparison with the computational predictions. Making meaningful comparisons between the computational and experimental results requires careful characterization and control of the experimental features or parameters used as inputs into the computational model. Validation experiments must be designed to capture the essential physical phenomena, including all relevant initial and boundary conditions. A significant question of interest to modeling heat flux incident to an object in or near a fire is the contribution of the radiation and convection modes of heat transfer. The series of experiments documented in this test plan is designed to provide data on the radiation partitioning, defined as the fraction of the total heat flux that is due to radiation. 5 CONTENTS

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Numerical analysis supported with experimental measurements of premixed oxy‐propane flames in a fuel‐flex gas turbine combustor

et al. 2021

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The combustion, exhaust-gas concentrations, and stability characteristics of premixed CO 2 -diluted oxy-propane (C 3 H 8 /O 2 /CO 2 ) flames were investigated computationally using large eddy simulations (LES) in a swirl-stabilized model gas-turbine combustor. The simulations were carried out for ranges of equivalence ratio (Φ: 0.26-0.80) and oxygen fraction (OF: 35%-60%) at a fixed bulk inlet velocity of 5.2 m/s. The results indicate that the reaction rates increase with the increase of Φ and OF. Flames of the same adiabatic flame temperature (T ad ) show similar macro-and flowfield-structures, in terms of flame shape, flow circulation, and temperature, and species distributions, irrespective of the values of Φ and OF. At higher T ad , the flames were observed to be more compact with reduced flame thickness and higher Damkohler number (Da). In all cases, Da > 1 were observed, indicating the dominance of reaction rate in oxy-propane flames than the diffusion rate. A secondary IRZ was also observed near the outlet of the combustor. Mixture composition and combustion temperature influence the CO concentration at the combustor exit. The highest CO emission was observed at 0.17 ppm for the flame with highest Φ and T ad , meanwhile no CO emission was seen for flames with high OF and low Φ among the studied cases. Highlights 1. Adiabatic flame temperature is a quantifying parameter for flame

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A two-thermocouples probe for radiation corrections of measured temperatures in compartment fires

Cited by 183 publications

References 6 publications

Smoke control in case of fire in a large car park: CFD simulations of full-scale configurations

Smoke control in case of fire in a large car park: CFD simulations of full-scale configurations

Validation experiments to determine radiation partitioning of heat flux to an object in a fully turbulent fire.

Numerical analysis supported with experimental measurements of premixed oxy‐propane flames in a fuel‐flex gas turbine combustor

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