Download or read book Computer Simulation of the Burning of a Multicomponent Droplet written by Elizabeth Katherine Flatbush and published by . This book was released on 1987 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computer Code for the Simulation of the Combustion of a Multicomponent Droplet written by Karola Sommer and published by . This book was released on 2003 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Simulation of Combustion of Single Component and Multicomponent Unsupported and Fiber supported Droplets in Micro gravity written by Narugopal Ghata and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed computational study of evaporation and combustion phenomena of unsupported and fiber-supported single and multi-component droplets is presented. The current study consists of a total of five parts: (a) study the effects of support fibers on the vaporization of single component n-heptane droplets, (b) study the effects of the Marangoni stress in single component n-heptane droplet combustion, (c) study the effects of support fibers in single component n-heptane droplet combustion, (d) study soot shell formation for single component n-heptane droplet, and (e) study multi-component n-heptane/n-hexadecane droplet evaporation and combustion. The volume-of-fluid (VOF) method is employed in the studies to capture the liquid-gas interface for transient two-phase multidimensional flows. The calculations also include variable thermo-physical properties of the liquid and gas phases as well as Marangoni stresses. In the first part of the study, a detailed numerical investigation of the effects of support fibers on the vaporization of a fiber-supported n-heptane droplet in reduced gravity is presented. This part of the study also investigated the effects of the thickness of fiber, ambient pressure, and ambient temperature on droplet evaporation. The computational results were validated with experimental results. In the second part of the droplet combustion study, a detailed numerical investigation of the Marangoni effects for fiber supported n-heptane droplet combustion in reduced gravity is presented. A 21-step n-heptane reaction mechanism proposed by Machrafi et al. (2009) is incorporated to model the combustion with both low and high temperature chemistry. Predicted burning rates and flame diameters have been validated with data from drop tower experiments. The present computational results agree well with the experimental results. The primary focus in the third part of the study is on the effects of support fibers on the droplet burning rates and flame structure. A 21-step n-heptane reaction mechanism consisting of 20 species proposed by Zhang et al. (2013) is employed to model the combustion chemistry. Computed burning rates and flame stand-off ratios are compared with the experimental results of Jackson and Avedisian (1993). Predicted flame structures are also validated with the experimental results of Mikami et al. (1994). The present computational results agree well with the experimental results. The results indicate that the support fibers can have significant impact on droplet burning rates and flame structures. In the fourth part of the study, a detailed numerical investigation of unsupported and fiber supported n-heptane droplet combustion in reduced gravity is done to explore some important information i.e., the location of pyrolysis and soot shell using a complex multidimensional computational fluid dynamic (CFD) analysis with a detailed reaction mechanism. A 25-step n-heptane mechanism consisting of 21 species is incorporated to model the combustion. The reaction mechanism is validated for the ignition delay time. Computed burning rates and flame stand-off ratios for both unsupported and fiber-supported droplets have been validated with prior computational and experimental studies. The computed soot shell stand-off ratios are validated by comparisons with experimental and computational results. The present computational results agree well with the experimental results.In the fifth and final part, a numerical study of vaporization and combustion of unsupported and fiber-supported multi-component n-heptane/n-hexadecane droplet is presented.

Download or read book Single and Multicomponent Liquid Droplet Combustion written by Anthony John Marchese and published by . This book was released on 1996 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Droplets and Sprays Simple Models of Complex Processes written by Sergei S. Sazhin and published by Springer Nature. This book was released on 2022-06-28 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book acts as a guide to simple models that describe some of the complex fluid dynamics, heat/mass transfer and combustion processes in droplets and sprays. Attention is focused mainly on the use of classical hydrodynamics, and a combination of kinetic and hydrodynamic models, to analyse the heating and evaporation of mono- and multi-component droplets. The models were developed for cases when small and large numbers of components are present in droplets. Some of these models are used for the prediction of time to puffing/micro-explosion of composite water/fuel droplets — processes that are widely used in combustion devices to stimulate disintegration of relatively large droplets into smaller ones. The predictions of numerical codes based on these models are validated against experimental results where possible. In most of the models, droplets are assumed to be spherical; some preliminary results of the generalisation of these models to the case of non-spherical droplets, approximating them as spheroids, are presented.

Download or read book Theoretical and Experimental Studies on Evaporation and Combustion of Multicomponent Droplets in Reduced Gravity written by Israel Aharon and published by . This book was released on 1996 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Direct Numerical Simulation of a Multicomponent Droplet laden Mixing Layer written by Kishore K. Varanasi and published by . This book was released on 2001 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1989 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Droplet Combustion and Gasification Mechanisms of Multicomponent and Reactive Materials written by Albert Lee and published by . This book was released on 1990 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Paper written by and published by . This book was released on 1994 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modelling of the Multicomponent Droplet Vaporization written by Virginel Bodoc and published by . This book was released on 2011 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this thesis was to study the vaporization of a multicomponent spray with both experimental and numerical approaches. To achieve this objective, the effort was guided in two directions. Firstly, an experimental database has been created using different optical measurement techniques. A special attention was focused onto the application of Global Rainbow Refractometry (GRR), used for the measurement of droplets temperature. Secondly, numerical simulations were performed for mono and bi-component sprays in evaporation. In the first part of this study, experimental and numerical tests were carried out on a polydisperse nonconfined and cooling spray. This configuration was adopted because it allows the study of the vaporization with a reduced influence from the gaseous phase. For a bi-component liquid, the effect of the composition variation on the GRR measurements was analysed within a coupling between the experimental technique and the numerical simulation. In the second part, experimental investigations and numerical simulation were performed for a more complex configuration that consists in a spray evolving in a heated and confined medium. The gaseous phase was computed with a LES approach while the dispersed phase, always mono-component, was solved with a Lagrangian tracking approach . The unsteady nature of the flow was demonstrated and the interest of the GRR technique for the droplets temperature measurement was proved.

Download or read book Detailed Numerical Simulation of an Isolated Droplet particle Combustion with Applications to Combustion of Metals written by Abhijit Modak and published by . This book was released on 2003 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On the Disruptive Vaporization and Burning of Emulsified and Multicomponent Fuel Droplets written by Juan Carlos Lasheras and published by . This book was released on 1980 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On the Disruptive Vaporization and Burning of Emulsified and Multicomponent Fuel Droplets written by Juan C. Lasheras Torralba and published by . This book was released on 1981 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Droplet Combustion A Theoretical Approach written by Shah Shahood Alam and published by LAP Lambert Academic Publishing. This book was released on 2015-03-23 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The findings of this work provides an insight into the fundamental aspects of liquid droplet combustion modelling by developing different droplet sub models. An unsteady, spherically symmetric, sub critical, single component gas phase model is developed first and tested for various ambient conditions of temperature, pressure, composition and fuels.It is further extended to include the effects of convection, droplet heating and emissions.A high pressure droplet vaporization model is evolved in view of the supercritical vaporization occuring in diesel engines and liquid rockets.Also, simple and detailed multi component droplet vaporization/combustion models are developed, since commercial fuels used in engines are multi component fuels.The discrete droplet sub models are simple and realistic requiring less computation time and therefore feasible for their implementation in spray combustion codes where CPU economy is vital.

Download or read book Combustion and Micro explosion of Multicomponent Droplets written by Ching-Hua Wang and published by . This book was released on 1983 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: