Heat release rate is a fundamental property of great importance for the theoretical and experimental elucidation of unsteady flame behaviors such as combustion noise, combustion instabilities, and pulsed combustion. Investigations of such thermoacoustic interactions require a reliable indicator of heat release rate capable of resolving spatial structures in turbulent flames. Traditionally, heat...

A simpl i fied method is presented for calculati ng mean major species concentrations (02' CO2, CO) in turbulent fires for any fuel given the species distribution of the same fuel in a laminar diffusion flame. This method, verified by extensive measurements, uses a probability d Iat r t bution function (Pdf) for the conserved scalar in turbulent fires together wi th a uniform mi xedness paramet...

Dynamics of outwardly-propagating reaction fronts inspires both fundamental and practical interests. While for the former we can mention in pass supernovae explosions and measurements of laminar flame speeds of reactive mixtures, the latter is relevant to the operation of engines and prevention of spark-initiated hazards such as accidental or intentional explosions. While a pointy-ignited, expa...

There are several previous successful PDF modeling studies [1-3] of the Barlow & Frank nonpremixed piloted jet flames (flames D, E and F) [4]. While there is at least partial understanding of the influence of turbulent mixing models on these calculations [5,6], there has been no systematic study of the influence of the chemical mechanism that is employed. In this work, focusing on flame F (whic...

Flame stabilization by swirl is a common feature of many combustors. While most of the swirl combustors are enclosed, there have been relatively few studies of open swirl-stabilized flames. In the current study, an open swirl-stabilized turbulent premixed flame is studied numerically. The purpose of this work is to obtain a better understanding of the flame properties by simulating the flow fie...

Received ; accepted – 2 – ABSTRACT We present a statistical model which shows the influence of turbulence on a thermonuclear flame propagating in C+O white dwarf matter. Based on a Monte Carlo description of turbulence, it provides a method for investigating the physics in the so-called distributed burning regime. Using this method we perform numerical simulations of turbulent flames and show t...