Optical studies of the generation of noise in turbulent flames

Price, Robert B.; Hurle, I. R.; Sugden, T. M.

doi:10.1016/s0082-0784(69)80487-x

Cited by 114 publications

(69 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Flames are imaged on an intensified PCO-Sensicam camera equipped with a CH * narrow band-pass filter and a f /16,180 mm telecentric lens [25] ( Fig. 2 ).…”

Section: Experimental Configurationmentioning

confidence: 99%

Joint experimental and numerical study of the influence of flame holder temperature on the stabilization of a laminar methane flame on a cylinder

Miguel-Brebion

Mejía

Xavier

et al. 2016

Combustion and Flame

View full text Add to dashboard Cite

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. a b s t r a c tThe mechanisms controlling laminar flame anchoring on a cylindrical bluff-body are investigated using DNS and experiments. Two configurations are examined: water-cooled and uncooled steel cylinders. Comparisons between experimental measurements and DNS show good agreement for the flame root locations in the two configurations. In the cooled case, the flame holder is maintained at about 300 K and the flame is stabilized in the wake of the cylinder, in the recirculation zone formed by the products of combustion. In the uncooled case, the bluff-body reaches a steady temperature of about 700 K in both experiment and DNS and the flame is stabilized closer to it. The fully coupled DNS of the flame and the temperature field in the bluff-body also shows that capturing the correct radiative heat transfer from the bluff-body is a key ingredient to reproduce experimental results.

show abstract

“…Flames are imaged on an intensified PCO-Sensicam camera equipped with a CH * narrow band-pass filter and a f /16,180 mm telecentric lens [25] ( Fig. 2 ).…”

Section: Experimental Configurationmentioning

confidence: 99%

Joint experimental and numerical study of the influence of flame holder temperature on the stabilization of a laminar methane flame on a cylinder

Miguel-Brebion

Mejía

Xavier

et al. 2016

Combustion and Flame

View full text Add to dashboard Cite

show abstract

“…The heat release regions are assumed according to experimental data. As indicated by previous works, chemiluminescence is often used as a marker of the heat release rate in flames [23][24][25][26]. In hydrocarbon flames, we employ CH images to locate the heat release distributions [27].…”

Section: Combustion Modelmentioning

confidence: 99%

Quasi-One-Dimensional Multimodes Analysis for Dual-Mode Scramjet

Tian

陈立红

陈强

et al. 2014

Journal of Propulsion and Power

View full text Add to dashboard Cite

A quasi-one-dimensional analytical method with a novel model for precombustion shock train has been proposed to model different modes in the dual-mode scramjet flowfield. The interaction between shock and combustion is modeled by a strength-adaptable model in the isolator, named the "X shock." An iterative procedure is implemented to solve the precombustion shock and the flow properties downstream. The calculation of the combustor is based on a series of governing equations where the effects of area change, friction, and mass injection are included. The release of energy is obtained from a fuel-mixing model or pregiven heat release distributions estimated from experimental results. The numerical results of pressure are compared with the experimental data for validation of the present model. The results show that the quasi-one-dimesional method can be applied to analyze diverse modes in the whole process of the dualmode scramjet combustor. Subscripts in = conditions in the inlet of the isolator max = maximum value min = minimum value 0 = total or stagnation conditions

show abstract

“…2 ) requires the knowledge of the heat release rate fluctuations. For a perfectly premixed mixture at a given equivalence ratio, the heat release rate ˙ q is proportional to the flame surface, A , and to the light emission, I , from free radicals CH * [17][18][19] , and it is possible to determine the transfer function from one of the following expressions: To reduce the error due to experimental noise the flame transfer function may be calculated by:…”

Section: Experimental Strategymentioning

confidence: 99%

Influence of flame-holder temperature on the acoustic flame transfer functions of a laminar flame

Mejía

Miguel-Brebion

Ghani

et al. 2018

Combustion and Flame

View full text Add to dashboard Cite

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. a b s t r a c tThe occurrence of combustion instabilities in high-performance engines such as gas turbines is often affected by the thermal state of the engine. For example, strong bursts of pressure fluctuations may occur at cold start for operating conditions that are stable once the engine reaches thermal equilibrium. This observation raises the question of the influence of material temperature on the response of flames to acoustic perturbations. In this study, we assess the influence of the temperature of the flame holder for a laminar flame. Both experiments and numerical simulations show that the Flame Transfer Function (FTF) is strongly affected by the flame-holder temperature. The key factors driving the evolution of the FTF are the flame-root location as well as the modification of the flow, which affects its stability. In the case of the cooled flame-holder, the formation of a recirculation zone is identified as the main impact on the FTF.

show abstract

Optical studies of the generation of noise in turbulent flames

Cited by 114 publications

References 3 publications

Joint experimental and numerical study of the influence of flame holder temperature on the stabilization of a laminar methane flame on a cylinder

Joint experimental and numerical study of the influence of flame holder temperature on the stabilization of a laminar methane flame on a cylinder

Quasi-One-Dimensional Multimodes Analysis for Dual-Mode Scramjet

Influence of flame-holder temperature on the acoustic flame transfer functions of a laminar flame

Contact Info

Product

Resources

About