Numerical Study of n-Heptane Auto-ignition Using LES-PDF Methods

Jones, W.P.; Navarro‐Martinez, S.

doi:10.1007/s10494-009-9228-9

Cited by 38 publications

(19 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The new kernel is formed at roughly the same downstream location as the original one. Similar observations were made in [43]. This is followed by the growth of the new kernel and further disappearing of the old one (t 6 , t 7 and t 8 ).…”

Section: Sensitivity To Velocities and Temperaturesupporting

confidence: 82%

LES-CMC Simulations of Different Auto-ignition Regimes of Hydrogen in a Hot Turbulent Air Co-flow

Stanković

Mastorakos

Merci

2013

Flow Turbulence Combust

View full text Add to dashboard Cite

In: Flow, Turbulence and CombustionTo refer to or to cite this work, please use the citation to the published version:I. Stankovic, E. Mastorakos and B. Merci (2013). LES-CMC simulations of different autoignition regimes of hydrogen in a hot turbulent air co-flow. Flow, Turbulence and Combustion. 90:583-604. DOI: 10.1007/s10494-013-9443-2 Noname manuscript No. (will be inserted by the editor) LES-CMC simulations of different auto-ignition regimes of hydrogen in a hot turbulent air co-flowReceived: date / Accepted: date Abstract Large-Eddy Simulation (LES) results in combination with first-order Conditional Moment Closure (CMC) are presented for a hydrogen jet, diluted with nitrogen, issued into a turbulent co-flowing hot air stream. The fuel mixes with the co-flow air, ignites and forms a lifted-like flame. Global trends in the experimental observations are in general well reproduced: the auto-ignition length decreases with increase in co-flow temperature and increases with increase in co-flow velocity. In the experiments, the co-flow temperature was varied, so that different auto-ignition regimes, including low Damköhler number situations, were obtained (no ignition, random spots, flashback and lifted flame). All regimes are recovered in the simulations. Auto-ignition is found to be the stabilizing mechanism. The impact of different detailed chemistry mechanisms on the auto-ignition predictions is discussed. With increasing air temperature, the differences between the mechanisms considered diminish. The evolution of temperature, H 2 O, H, HO 2 and OH from inert to burning conditions is discussed in mixture fraction space.

show abstract

Section: Sensitivity To Velocities and Temperaturesupporting

confidence: 82%

LES-CMC Simulations of Different Auto-ignition Regimes of Hydrogen in a Hot Turbulent Air Co-flow

Stanković

Mastorakos

Merci

2013

Flow Turbulence Combust

View full text Add to dashboard Cite

show abstract

“…The model was also proposed independently in stirred reactor studies where it is known as Interaction by Exchange with the Mean (IEM), [40]. The LMSE closure has been used previously in the LES studies of Mustata et al [25] and Jones and Navarro-Martinez [26,28,41]. Thus the final term in equation (13) is replaced by:…”

Section: Filtered Probability Density Functionmentioning

confidence: 99%

Large Eddy Simulation of the Sandia Flame Series (D–F) using the Eulerian stochastic field method

Jones

Prasad

2010

Combustion and Flame

163

View full text Add to dashboard Cite

Three turbulent piloted methane jet flames with increasing levels of local extinction (Sandia Flames D, E and F) have been computed using Large Eddy Simulation. The smallest unresolved scales of the flow, in which combustion occurs, are represented using the filtered Probability Density Function method where the corresponding evolution equation is solved directly. A dynamic model for the sub-grid stresses together with a simple gradient diffusion approximation for the scalar fluxes is applied in conjunction with the linear mean square estimation closure for sub-filter scale mixing. An augmented reduced mechanism (ARM) derived from the full GRI 3.0 mechanism has is incorporated to describe the chemical reaction. The results demonstrate the ability of the method in capturing quantitatively finite rate effects such as extinction and re-ignition in turbulent flames.

show abstract

“…The results to be described have been obtained within European Project [25] in collaboration with Rolls Royce Germany, who provided details of the combustor and fuel injector geometries, the spark ignitor and the kerosene and air flow rates. Large Eddy Simulations were carried out using an in-house block-structured, parallel, boundary conforming coordinate LES code, BOFFIN-LES [33], further details of which can be found in Jones and Navarro-Martinez [31]. Due to very limited amount of experimental data available the results presented are essentially qualitative in nature.…”

Section: Resultsmentioning

confidence: 99%

“…The model was also proposed independently in stirred reactor studies where it is known as Interaction by Exchange with the Mean (IEM) [66]. The LMSE closure has been used previously in the LES studies of Mustata et al [45], Jones and Navarro-Martinez [29,30,31] and Jones et al [34]. Thus the final term in (23) is replaced by:…”

Section: Gas Phase Combustion: the Filtered Probability Density Functionmentioning

confidence: 99%

Large Eddy Simulation of Spark Ignition in a Gas Turbine Combustor

Jones

Tyliszczak

2010

Flow Turbulence Combust

View full text Add to dashboard Cite

Ignition in an aircraft gas turbine combustion chamber is simulated using Large Eddy Simulation (LES) in conjunction with the filtered probability density function (pdf ) equation approach, which is solved using the Eulerian stochastic field method. The LES-pdf methodology is used for both dispersed (liquid) and gas phases. The liquid phase is described using a Lagrangian formulation whilst an Eulerian approach is employed for the gas phase. The spark energy deposition was mimicked by a distributed energy source term added to the enthalpy equation. Unsuccessful and successful ignition sequences have been simulated and the results suggest that spark 'size' is an important parameter in the ignition of kerosene fuelled combustion chambers.

show abstract

Numerical Study of n-Heptane Auto-ignition Using LES-PDF Methods

Cited by 38 publications

References 48 publications

LES-CMC Simulations of Different Auto-ignition Regimes of Hydrogen in a Hot Turbulent Air Co-flow

LES-CMC Simulations of Different Auto-ignition Regimes of Hydrogen in a Hot Turbulent Air Co-flow

Large Eddy Simulation of the Sandia Flame Series (D–F) using the Eulerian stochastic field method

Large Eddy Simulation of Spark Ignition in a Gas Turbine Combustor

Contact Info

Product

Resources

About