Download or read book Theoretical Analysis of Heptane Droplet Combustion for Comparison with Results from the Shuttle Spacelab During the MSL 1 Mission written by B. L. Zhang and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microgravity Science Laboratory MSL 1 written by and published by . This book was released on 1998 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fifth International Microgravity Combustion Workshop written by and published by . This book was released on 1999 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sixth International Microgravity Combustion Workshop written by and published by . This book was released on 2001 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 36th Aerospace Sciences Meeting Exhibit written by and published by . This book was released on 1998 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 2001 with total page 1304 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 Combustion of Heptane Droplets in a Hot Gas Flow written by Joel Lawrence Bert and published by . This book was released on 1967 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EVAPORATION AND COMBUSTION OF SINGLE FUEL DROPLETS IN A HOT ATMOSPHERE written by MICHAL A. SAAD and published by . This book was released on 1956 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simplified Analyses of Methanol Droplet Combustion for Comparison with Microgravity Experimental Results written by B. L. Zhang and published by . This book was released on 1996 with total page 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 Droplet Combustion of Surrogate and Real Fuel Systems in a Low Convection Condition written by Yu-Cheng Liu and published by . This book was released on 2013 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: The droplet burning characteristics of aviation (Jet-A) and ground transportation (gasoline) fuels, a standard reference gasoline (indolene), three and four component surrogate fuels, several biodiesel surrogates (methyl butanoate (MB) and decanoate (MD)), and three single component fuels (heptane, octane and decane) were examined from the perspective of the spherically symmetric droplet flame promoted by a low gravity environment in the standard atmosphere. The parameters included the initial droplet diameter (Do) and the fuel composition. Access to the experimental times required to observe the complete droplet burning history was obtained by carrying out the experiments in a drop tower that provided about 1 s of experimental time (Do ~ 1 mm), and the orbiting International Space Station (ISS) using an experimental design on the ISS that could produce both freely-floating and fiber-supported droplets with essentially any Do and unlimited experimental times. For some of the results reported (those for n-heptane, n-octane, ndecane) Do was varied over the widest range ever reported (0.5 mm to 5 mm) across which radiative and sooting processes were considered to either influence burning (for Do ~ 1.5 mm) or have a minimal affect (for Do
Download or read book Combustion Theory written by Forman A. Williams and published by CRC Press. This book was released on 2018-03-05 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combustion Theory delves deeper into the science of combustion than most other texts and gives insight into combustions from a molecular and a continuum point of view. The book presents derivations of the basic equations of combustion theory and contains appendices on the background of subjects of thermodynamics, chemical kinetics, fluid dynamics, and transport processes. Diffusion flames, reactions in flows with negligible transport and the theory of pre-mixed flames are treated, as are detonation phenomena, the combustion of solid propellents, and ignition, extinction, and flamibility pehnomena.
Download or read book Studies on Droplet Combustion written by Chung King Law and published by . This book was released on 1973 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Spherically Symmetric Flames written by G. S. Jackson and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Droplet Combustion Models written by James David Kearns and published by . This book was released on 1973 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
