Intensity and efficiency of spray fuel-fed well-mixed adiabatic combustors

Rosner, Daniel E.; Arias‐Zugasti, Manuel; Labowsky, M.

doi:10.1016/j.ces.2008.04.027

Cited by 9 publications

(26 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The above analysis can readily be extended to growing particles (see Appendix) and to calculate/correlate capture efficiencies of volatile particles on submerged surfaces. Beyond the benefits of properly describing the behavior of individual volatile particles, l is expected to be a rational correlating parameter for the response of swarms of particles as in, for example, atmospheric clouds and turbulent spray combustors (Rosner et al, 2008;Rosner, 2009;Labowsky et al, in press).…”

Section: Discussionmentioning

confidence: 98%

An entrainment parameter for volatile particles

Labowsky

2011

Chemical Engineering Science

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 98%

An entrainment parameter for volatile particles

Labowsky

2011

Chemical Engineering Science

View full text Add to dashboard Cite

“…What makes these processes even more complex is the fact that they are affected by the nature/properties of the surrounding atmosphere. Several published efforts were devoted to studying and understating spray combustion as a whole (e.g., Faeth, 1996;Labowsky et al, 2011;Lefebvre, 1989;Marcic, 2002;Ra and Reitz, 2004;Raju, 2002;Rosner et al, 2008;Sadiki et al, 2005;Sommerfield and Qiu, 1998;Sornek et al, 2000; to cite only a few); however, most published studies on spray combustion were focused on the so called 1296 M. BIROUK "idealized" case. That is, spray may be assumed as an ensemble of droplets and, hence, its understanding could be achieved through knowledge gained from the examination of a single droplet.…”

Section: Introductionmentioning

confidence: 98%

“…Although, the achieved results revealed important knowledge in that the effect of turbulence is not controlled by its largest scales, further investigations are required especially at test conditions pertaining to practical applications. It was recently reported that spray combustion numerical/modeling codes employed by industry rely on untested approximations on the effect of gas phase turbulence on spray gasification (Labowsky et al, 2011;Rosner et al, 2008). This is mainly due to the lack of data and knowledge on the impact of gas phase turbulence on the droplet gasification, especially under realistic test conditions of ambient pressure and temperature.…”

Section: Introductionmentioning

confidence: 98%

A Hydrocarbon Droplet Evaporating in Turbulent Environment at Elevated Ambient Pressure and Temperature

Birouk

2014

Combustion Science and Technology

View full text Add to dashboard Cite

This study presents new experimental results on the vaporization process of hydrocarbon droplet in a turbulent environment at elevated ambient pressure and temperature conditions. n-Heptane and n-decane, which provide a wide range of hydrocarbons properties, were tested. The initial droplet diameter was on the order of 1 mm, and its surrounding ambient consisted of varying turbulence intensity up to 3.10 m/s, pressure up to 16 bar, and temperature up to 150 • C. The results revealed that the hydrocarbon droplet followed the d 2 -law throughout its entire lifetime under all ambient conditions explored here. Increasing the ambient pressure increases the droplet vaporization lifetime, whereas increasing the ambient temperature reduces the droplet lifetime. More importantly, turbulence becomes more effective as ambient pressure increases, whereas it diminishes with increasing the ambient temperature. The experimental data were used to develop a more comprehensive hydrocarbons droplet mass transfer correlation.

show abstract

“…Spray‐fuel fed steady‐flow combustors can profitably be investigated by adopting a population‐balance viewpoint (e.g., Ref 1…”

Section: Introduction: Background Motivation and Objectivesmentioning

confidence: 99%

“…)—coupling the evaporating fuel spray population with the surrounding gas mixture (assuming the oxidizer is gaseous, e.g., O 2 ‐enriched, or, perhaps, “vitiated” air). In Ref 1,. we treated the limiting case of a well‐macromixed adiabatic combustor containing single‐component (kerosene‐like) droplets but allowed for the intrinsically transient nature of the gas‐diffusion‐controlled droplet vaporization process—especially important for high‐pressure (above ca.…”

Section: Introduction: Background Motivation and Objectivesmentioning

confidence: 99%

Bivariate population balance model of ethanol‐fueled spray combustors

Rosner

Arias‐Zugasti

2011

AIChE Journal

Self Cite

View full text Add to dashboard Cite

We present a bivariate population balance-based formulation of the performance of well-mixed adiabatic combustors fed by ethanol (EtOH)-containing sprays of prescribed droplet size distribution (DSD) and composition. Our historically interesting example is the fuel-cooled V-2 chemical rocket-using 75 wt % EtOH þ H 2 O solution, and oxidizer O 2 (L). Of special interest are the predicted combustion ''intensity'' (GW/m 3 ) and efficiency (EtOH fraction vaporized) at each ratio of combustor mean residence time to feed-droplet characteristic vaporization time. Our formulation exploits a quasi-steady, gas-diffusioncontrolled individual droplet evaporation rate law, and the method-of-characteristics to solve the associated first-order population balance partial differential equation governing the joint distribution function n(m 1 , m 2 ) of the fuel spray exiting such a chamber, where m 1 ¼ EtOH mass/droplet, and m 2 ¼ H 2 O mass/droplet. Besides the combustor efficiency and intensity, this bivariate distribution function enables predictions of corresponding unconditional DSD, and the joint distribution function(diam., droplet temperature)-perhaps measurable. Our numerically exact formulation/results also provide valuable test cases for convenient approximate methods (bivariate moment and spectral/weighted residual) to predict these ''correlated'' bivariate distribution functions in more complex situations.

show abstract

Intensity and efficiency of spray fuel-fed well-mixed adiabatic combustors

Cited by 9 publications

References 22 publications

An entrainment parameter for volatile particles

An entrainment parameter for volatile particles

A Hydrocarbon Droplet Evaporating in Turbulent Environment at Elevated Ambient Pressure and Temperature

Bivariate population balance model of ethanol‐fueled spray combustors

Contact Info

Product

Resources

About