Experimental Measurement of Local Burning Velocity Within a Rotating Flow

Long, Edward J.; Hargrave, Graham K.

doi:10.1007/s10494-011-9331-6

Cited by 9 publications

(5 citation statements)

References 25 publications

(54 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, thermophoretic effects influence the accuracy of the PIV technique in the high temperature-gradient region of a flame [19]. For these reasons, the use of velocity data measured in the region of unburned Figure 8), but consistent with the findings of previous researchers [9,5]. Figure 8 also shows a significant population of negative local 3D displacement speeds.…”

Section: Data Processing and Local Displacement Speed Reconstructionsupporting

confidence: 83%

See 1 more Smart Citation

Premixed flame propagation in turbulent flow by means of stereoscopic PIV and dual-plane OH-PLIF at sustained kHz repetition rates

Trunk

Boxx

Heeger

et al. 2013

Proceedings of the Combustion Institute

View full text Add to dashboard Cite

This paper describes an experimental study on the propagation of premixed flames through a flow with well-defined turbulence characteristics. In this study, multi-plane OH planar laserinduced fluorescence (OH-PLIF) and stereoscopic particle image velocimetry (SPIV) were applied simultaneously at 10 kHz to measure the local three-dimensional displacement velocity of unstabilized, freely propagating flames passing through a premixed flow of methane and air. The dual-plane OH-PLIF data was used to track both reaction zone location and flame-normal orientation, while SPIV was used to track the three-component velocity field. The vectorial difference of the two produces a direct, time-resolved measurement of the local 3D displacement velocity of the flame. The use of unstabilized, freely propagating flames eliminates spatiotemporal dependence of local 3D displacement velocity associated with burner-or aerodynamically-stabilized test flames. Statistics of local 3D displacement velocities are presented. These show values ranging from slightly negative up to approximately eight times the laminar flame speed. Instantaneous flame-normal orientation with respect to the direction of local fluid velocity is identified as one parameter affecting instantaneous displacement velocities.

show abstract

Section: Data Processing and Local Displacement Speed Reconstructionsupporting

confidence: 83%

“…The response of premixed flames on curvature and strain has been investigated experimentally by isolated axisymmetric vortex rings [4,5] interacting with laminar premixed flames. The advantage of these configurations is that they allow for repeatable flame-flowinteractions.…”

Section: Introductionmentioning

confidence: 99%

Premixed flame propagation in turbulent flow by means of stereoscopic PIV and dual-plane OH-PLIF at sustained kHz repetition rates

Trunk

Boxx

Heeger

et al. 2013

Proceedings of the Combustion Institute

View full text Add to dashboard Cite

show abstract

“…The combustion bomb and the Time-Resolved Particle Image Velocimetry (TRPIV) technique used in this investigation have been described previously [21,22].…”

Section: Experimental Arrangementmentioning

confidence: 99%

“…As demonstrated for pure methane flames [21][22][23][24], such simple and controllable vortex structures provide different benefits over truly turbulent fields when fundamental investigation into flameturbulence interactions is performed.…”

Section: Introductionmentioning

confidence: 99%

Time-Resolved Particle Image Velocimetry of dynamic interactions between hydrogen-enriched methane/air premixed flames and toroidal vortex structures

Sarli

Benedetto

Long

et al. 2012

International Journal of Hydrogen Energy

129

View full text Add to dashboard Cite

Additional Information:• NOTICE: this is the author's version of a work that was accepted for publication in the International Journal of Hydrogen Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was sub- Regardless of the mixture stoichiometry, the hydrogen substitution to methane leads to a transition from a regime in which the vortex only wrinkles the flame front (x H2 < 0.2) to a * Corresponding author. Phone: +39 0817622673; Fax: +39 0817622915; E-mail address: valeria.disarli@irc.cnr.it 3 more vigorous regime in which the interaction almost results in the separation of small flame pockets from the main front (x H2 > 0.2). This transition was characterised in terms of time histories of flame surface area and burning rate.

show abstract

“…Hartung et al (Hartung et al 2009) reported a sophisticated method wherein PIV and multi-shot OH-PLIF were utilized simultaneously to measure 2D local flame displacement speed. Long et al (Long and Hargrave 2011) used only asynchronous PIV to simultaneously measure the velocity of unburnt gas and flame edges, based on which the 2D flame displacement speed and local burning rate were obtained. A similar strategy has also been adopted by Renou et al (Renou et al 2000) to measure the 2D flame displacement speed of freely propagating premixed flames.…”

Section: Introductionmentioning

confidence: 99%

Development and Validation of Evaluation Methods for 3D Flame Propagation Speed of Turbulent Non-premixed Edge Flames via Tomographic Chemiluminescence

Chi

Lei

Song

et al. 2021

Flow Turbulence Combust

View full text Add to dashboard Cite

This work reports the development and validation of evaluation methods for measurements of 3D, instantaneous, local flame propagation speed on a turbulent methane jet diffusion flame. Despite its fundamental importance to turbulent flame research, the experimental measurements for 3D flame propagation speed are scarce due to the complexity of turbulent flame surfaces and the mathematical challenges. Existing evaluation methods based on surface fitting and normal vectors cannot be readily extended to a laboratory-scale, turbulent flame. Two new methods were therefore developed to address this issue. The methods were validated numerically with artificially created phantoms and experimentally with 3D flame structures obtained by tomographic chemiluminescence on a turbulent jet flame. The methods were demonstrated to be able to evaluate the 3D flame propagation speed of complex flame structures with significantly enhanced accuracy and robustness. Based on the evaluations, the relationship between flame propagation speed and curvature was studied on the presented flame.

show abstract

Experimental Measurement of Local Burning Velocity Within a Rotating Flow

Cited by 9 publications

References 25 publications

Premixed flame propagation in turbulent flow by means of stereoscopic PIV and dual-plane OH-PLIF at sustained kHz repetition rates

Premixed flame propagation in turbulent flow by means of stereoscopic PIV and dual-plane OH-PLIF at sustained kHz repetition rates

Time-Resolved Particle Image Velocimetry of dynamic interactions between hydrogen-enriched methane/air premixed flames and toroidal vortex structures

Development and Validation of Evaluation Methods for 3D Flame Propagation Speed of Turbulent Non-premixed Edge Flames via Tomographic Chemiluminescence

Contact Info

Product

Resources

About