Download or read book An Experimental Study of the Breakup Mechanism of Coaxial Jet Spray written by and published by . This book was released on 2015 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of the Mixing Mechanism of Doublet Impinging Jet Spray written by 黃柏霖 and published by . This book was released on 2012 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Studies of the Breakup Dynamics in Turbulent Multiphase Jets written by Chin Hei Ng and published by . This book was released on 2015 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Breakup of a dispersed phase in a turbulent flow is a classical problem in multiphase flow with many applications in industrial and natural processes. Two different problems have been investigated. The first problem focused on the atomization of a liquid jet. We investigated the effect of the high-speed spray-pattern-shaping air streams on the atomization of a coaxial twin-fluid atomizer. Our experimental data revealed that the pattern air streams contribute to the atomization process, providing the air streams impinge on the liquid jet close to the liquid nozzle (in our atomizer, it is 3.25 liquid nozzle diameter downstream). In comparison with the spray with no pattern air stream, the number density of the larger drops increases at the spray rim of the major axis and decreases at the spray rim of the minor axis. The transport of the larger drops is caused by the pattern air modified flow field. Finally, based on the two-stage instabilities mechanism, we developed a model to predict the drop size of the spray. The second problem is the breakup of particles (air bubbles or oil drops) in a canonical turbulent round jet. Most turbulent breakup models are inspired by the Kolmogorov-Hinze theory, and assume the breakup is the result of the interaction between a particle and an eddy of similar length scale. We have shown that one of these models predicts the breakup of inviscid particles well, but it fails to predict the particle size of viscous particles. High-speed image sequences of the viscous particles breakup event revealed three distinct stages of breakup: deformation, stretching, and disintegration. Quantitative data also sup- ported these observations. The fluctuating behavior of the deformation factor (a particle shape indicator) in the deformation stage suggested that the deformation of a particle is caused by multiple series of eddy collisions. The stretching stage is unique and it is not observed in the breakup of inviscid particles. In this stage, a particle is stretched to multiple times its original size. This suggests the stretching mechanism is caused by the large scale fluid motion, so it contradicts with the Kolmogorov-Hinze theory where the deformation is caused by eddies in the inertial subrange. The disintegration of the stretched ligaments typically results in multiple daughter particles. This is also different from the breakup of inviscid particles, where binary breakup is the norm. A breakup detection and particle tracking algorithm was developed to extract data of particles along their breakup paths. These data were used to develop models for important breakup parameters, such as the breakup probability and the breakup time. We found that the probability of breakup depends on the disruptive effect due to the colliding turbulent eddies, as well as the confinement effects due to the internal viscous stress and the surface restoration pressure. Although the stretching mechanism is due to the large scale turbulent eddy, the stretching/thinning time is dictated by the small scale eddies. This is because as the particle is stretched into a ligament, the ligament is still constantly collided by eddies with length scale similar to the thickness. These eddies are responsible for the thinning of the ligament that ultimately leads to disintegration. The population balance equation describes the evolution of the particle size distribution in the breakup process. One of the closure functions required in this equation is the breakup frequency. The breakup frequency is obtained by combining the breakup time and breakup probability models. The prediction from the breakup frequency model compares favorably with the measured breakup frequency from the experimental data.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomization of a Small diameter Liquid Jet by a High speed Gas Stream written by Christopher Michael Varga and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 2002 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Study of Diesel Spray Characteristics and Atomization written by Chan-Teng Chang and published by . This book was released on 1997 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Innovative Design Analysis and Development Practices in Aerospace and Automotive Engineering written by Nicolas Gascoin and published by Springer Nature. This book was released on 2020-09-26 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the best articles presented by researchers and industrial experts at the International Conference on “Innovative Design, Analysis and Development Practices in Aerospace and Automotive Engineering (I-DAD 2020)”. The papers discuss new design concepts, and analysis and manufacturing technologies, with a focus on achieving improved performance by downsizing; improving the strength-to-weight ratio, fuel efficiency and operational capability at room and elevated temperatures; reducing wear and tear; addressing NVH aspects, while balancing the challenges of Euro VI/Bharat Stage VI emission norms, greenhouse effects and recyclable materials. Presenting innovative methods, this book is a valuable reference resource for professionals at educational and research organizations, as well as in industry, encouraging them to pursue challenging projects of mutual interest.
Download or read book Fluid Mechanics and Fluid Power Vol 3 written by Suvanjan Bhattacharyya and published by Springer Nature. This book was released on 2023-04-17 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the select proceedings of the 48th National Conference on Fluid Mechanics and Fluid Power (FMFP 2021) held at BITS Pilani in December 2021. It covers the topics such as fluid mechanics, measurement techniques in fluid flows, computational fluid dynamics, instability, transition and turbulence, fluid‐structure interaction, multiphase flows, micro- and nanoscale transport, bio-fluid mechanics, aerodynamics, turbomachinery, propulsion and power. The book will be useful for researchers and professionals interested in the broad field of mechanics.
Download or read book Handbook of Atomization and Sprays written by Nasser Ashgriz and published by Springer Science & Business Media. This book was released on 2011-02-18 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomization and sprays are used in a wide range of industries: mechanical, chemical, aerospace, and civil engineering; material science and metallurgy; food; pharmaceutical, forestry, environmental protection; medicine; agriculture; meteorology and others. Some specific applications are spray combustion in furnaces, gas turbines and rockets, spray drying and cooling, air conditioning, powdered metallurgy, spray painting and coating, inhalation therapy, and many others. The Handbook of Atomization and Sprays will bring together the fundamental and applied material from all fields into one comprehensive source. Subject areas included in the reference are droplets, theoretical models and numerical simulations, phase Doppler particle analysis, applications, devices and more.
Download or read book Fluid Mechanics and Fluid Power Contemporary Research written by Arun K. Saha and published by Springer. This book was released on 2016-09-20 with total page 1638 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprises the proceedings of the 42nd National and 5th International Conference on Fluid Mechanics and Fluid Power held at IIT Kanpur in December, 2014.The conference proceedings encapsulate the best deliberations held during the conference. The diversity of participation in the conference, from academia, industry and research laboratories reflects in the articles appearing in the volume. This contributed volume has articles from authors who have participated in the conference on thematic areas such as Fundamental Issues and Perspectives in Fluid Mechanics; Measurement Techniques and Instrumentation; Computational Fluid Dynamics; Instability, Transition and Turbulence; Turbomachinery; Multiphase Flows; Fluid‐Structure Interaction and Flow‐Induced Noise; Microfluidics; Bio‐inspired Fluid Mechanics; Internal Combustion Engines and Gas Turbines; and Specialized Topics. The contents of this volume will prove useful to researchers from industry and academia alike.
Download or read book Annual Research Briefs written by Center for Turbulence Research (U.S.) and published by . This book was released on 2011 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Advances In Spray Combustion written by Kenneth K. Kuo and published by AIAA. This book was released on 1996 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational and Experimental Study of Sprays from Breakup of Water Sheets written by Jesper Madsen and published by . This book was released on 2006 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experiments and Numerical Simulations of Turbulent Combustion of Diluted Sprays written by Bart Merci and published by Springer Science & Business Media. This book was released on 2014-03-27 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reflects the results of the 2nd and 3rd International Workshops on Turbulent Spray Combustion. The focus is on progress in experiments and numerical simulations for two-phase flows, with emphasis on spray combustion. Knowledge of the dominant phenomena and their interactions allows development of predictive models and their use in combustor and gas turbine design. Experts and young researchers present the state-of-the-art results, report on the latest developments and exchange ideas in the areas of experiments, modelling and simulation of reactive multiphase flows. The first chapter reflects on flame structure, auto-ignition and atomization with reference to well-characterized burners, to be implemented by modellers with relative ease. The second chapter presents an overview of first simulation results on target test cases, developed at the occasion of the 1st International Workshop on Turbulent Spray Combustion. In the third chapter, evaporation rate modelling aspects are covered, while the fourth chapter deals with evaporation effects in the context of flamelet models. In chapter five, LES simulation results are discussed for variable fuel and mass loading. The final chapter discusses PDF modelling of turbulent spray combustion. In short, the contributions in this book are highly valuable for the research community in this field, providing in-depth insight into some of the many aspects of dilute turbulent spray combustion.
Download or read book Internal Combustion Processes of Liquid Rocket Engines written by Zhen-Guo Wang and published by John Wiley & Sons. This book was released on 2016-08-29 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book concentrates on modeling and numerical simulations of combustion in liquid rocket engines, covering liquid propellant atomization, evaporation of liquid droplets, turbulent flows, turbulent combustion, heat transfer, and combustion instability. It presents some state of the art models and numerical methodologies in this area. The book can be categorized into two parts. Part 1 describes the modeling for each subtopic of the combustion process in the liquid rocket engines. Part 2 presents detailed numerical methodology and several representative applications in simulations of rocket engine combustion.
Download or read book Fluid Dynamics at Interfaces written by Wei Shyy and published by Cambridge University Press. This book was released on 1999-09-28 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book experts discuss research and applications in interfacial fluid dynamics.
Download or read book Fluid Mechanics and Fluid Power Vol 2 written by Suvanjan Bhattacharyya and published by Springer Nature. This book was released on 2023-05-20 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the select proceedings of the 48th National Conference on Fluid Mechanics and Fluid Power (FMFP 2021) held at BITS Pilani in December 2021. It covers the topics such as fluid mechanics, measurement techniques in fluid flows, computational fluid dynamics, instability, transition and turbulence, fluid‐structure interaction, multiphase flows, micro- and nanoscale transport, bio-fluid mechanics, aerodynamics, turbomachinery, propulsion and power. The book will be useful for researchers and professionals interested in the broad field of mechanics.
