Large eddy simulation of a monocomponent spray evaporating in a heated and turbulent flow

Abstract

Different experimental and numerical works were conducted at ONERA in order to carry out information about the evaporation of mono and multicomponent droplets. Different models were proposed and tested in computing codes. The goal of this paper is to describe the evaporation of carburant droplets in a highly turbulent and heated flow by numerical simulation. Firstly, the numerical approach is used in the comprehension of the mono and two-phase flow behavior. Secondly, a simple evaporation model implemented in the code CEDRE is tested for this configuration.

Concentration and composition measurement of sprays with a global rainbow technique

“…The rainbow is sensitive to any tiny change in the refractive index, size and shape of the particle. Then, by analyzing this rainbow profile, much information can be extracted, such as the refractive index [1][2][3] or refractive index gradient [4,5], droplet size or size distribution [1,6,7], temperature [1,6,[8][9][10][11][12][13][14][15][16] or temperature gradient [17] of the droplets. The intensity distribution of the rainbow can be processed by various inverse algorithms [12,18,19].…”

“…By fitting all of the global rainbow signals, it is possible to improve the accuracy on refractive index and size distribution measurements. This GRT configuration, including the inversion algorithm, had also been employed to measure the composition of a bi-component droplet during its evaporation [2,3]. The droplets investigated in the above references have the same composition.…”

A model for a non-uniform spray evaporator taking into account the effect of non-isothermal polydisperse droplets

“…Many researchers studied extensively on monodisperse [3][4][5][6][7] and polydisperse [8][9][10][11][12] spray evaporation. Monocomponent [13,14], bicomponent [15,16] and multicomponent [17,18] droplet evaporations were investigated via both experiment and simulation. A model considering the effects of variable thermophysical properties, non-unitary Lewis number in the gas film, and Stefan flow on heat and mass transfer between the droplet and the gas as well as the effect of internal circulation and transient liquid heating were simulated [19].…”