Download or read book Measurement of Temperature in Falling Droplets Using Laser Induced Fluorescence Method written by Sergio Escobar Vargas and published by . This book was released on 1999 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Temperature on In flight Water Droplets by Laser Induced Fluorescence Thermometry written by Víctor M. Salazar Izquierdo and published by . This book was released on 2003 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Measurements of Fluctuating Temperatures in a Supersonic Turbulent Flow Using One and Two photon Laser induced Fluorescence written by and published by . This book was released on 1984 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development Steps of 2 color Laser induced Fluorescence with MDR enhanced Energy Transfer for Instantaneous Planar Temperature Measurement of Micro droplets and Sprays written by Johannes Palmer and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temperature Measurements in a Flow Using Laser Induced Fluorescence of Oxygen written by Franck Kolczak and published by . This book was released on 1992 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Visualization of Two phase Fluid Distributions Using Laser induced Exciplex Fluorescence written by JongUk Kim and published by . This book was released on 1997 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nano and Micro scale Temperature Measurements Using Laser induced Fluorescence Thermometry written by Christine Tomforde and published by . This book was released on 2011 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of determining nanoparticle temperature through fluorescence intensity levels is described. Intracellular processes are often tracked through the use of fluorescence tagging, and ideal temperatures for many of these processes are unknown. Through the use of fluorescence-based thermometry, cellular processes such as intracellular enzyme movement can be studied and their respective temperatures established simultaneously. Polystyrene and silica nanoparticles are synthesized with a variety of temperature-sensitive dyes such as BODIPY, rose Bengal, Rhodamine dyes 6G, 700, and 800, and Nile Blue A and Nile Red. Photographs are taken with a QImaging QM1 Questar EXi Retiga camera while particles are heated from 25 to 70 C and excited at 532 nm with a Coherent DPSS-532 laser. Photographs are converted to intensity images in MATLAB and analyzed for fluorescence intensity, and plots are generated in MATLAB to describe each dye's intensity vs temperature. Regression curves are created to describe change in fluorescence intensity over temperature. Dyes are compared as nanoparticle core material is varied. Large particles are also created to match the camera's optical resolution capabilities, and it is established that intensity values increase proportionally with nanoparticle size. Nile Red yielded the closest-fit model, with R2 values greater than 0.99 for a second-order polynomial fit. By contrast, Rhodamine 6G only yielded an R2 value of 0.88 for a third-order polynomial fit, making it the least reliable dye for temperature measurements using the polynomial model. Of particular interest in this work is Nile Blue A, whose fluorescence-temperature curve yielded a much different shape from the other dyes. It is recommended that future work describe a broader range of dyes and nanoparticle sizes, and use multiple excitation wavelengths to better quantify each dye's quantum efficiency. Further research into the effects of nanoparticle size on fluorescence intensity levels should be considered as the particles used here greatly exceed 2 ìm. In addition, Nile Blue A should be further investigated as to why its fluorescence-temperature curve did not take on a characteristic shape for a temperature-sensitive dye in these experiments.
Download or read book Advanced Earth to orbit Propulsion Technology 1994 written by Robert J. Richmond and published by . This book was released on 1994 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental analysis of laser induced fluorescence for simultaneous temperature and velocity measurement in water written by Peter Wilhelm Augustin and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Tech Briefs written by and published by . This book was released on 1988 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Droplet Size Concentration and Temperature Mapping in Sprays Using SLIPI based Techniques written by Yogeshwar Nath Mishra and published by . This book was released on 2001 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structured laser illumination planar imaging (SLIPI) is a technique capable of suppressing multiple light scattering effects in optically dense sprays, resulting in spray images without blurs and with enhanced contrast. The novelty of the work presented in this thesis concerns the applications of a variety of SLIPI-based techniques for the measurement of droplet size, droplet concentration, and liquid temperature in atomizing sprays. Two types of spray systems are investigated here: 1) Steady hollow-cone water sprays using temporally averaged imaging. 2) Transient Direct-Injection spark ignition (DISI) biofuel sprays using instantaneous imaging. The temporally averaged measurements are performed using three-phase SLIPI (3p-SLIPI) with liquid injection pressures in the range of 20–50 bar and at ambient conditions. Droplet sizing is obtained by combining SLIPI with the laser-induced fluorescence (LIF)/Mie ratio approach, where the droplet Sauter mean diameter is deduced after calibration with phase Doppler anemometry measurements. The droplet concentration and liquid volume fraction are obtained by combining the SLIPI-LIF/Mie method with light transmission measurements. This is performed using a laser sheet scanning approach, which provides three-dimensional quantitative reconstructions. Finally, the spray temperature is obtained by combining SLIPI with two-color LIF ratio thermometry for a liquid temperature ranging from 25–55°C. It is found that multiple light scattering induces measurement errors even for sprays having singly scattered photons in majority. This finding, therefore, strongly supports the application of SLIPI for quantitative spray measurements, even for optically dilute sprays. The 3p-SLIPI approach is based on recording a minimum of three modulated sub-images successively, each having a different spatial phase; therefore, it has been primarily used for temporally averaged imaging. To circumvent this limitation, two novel instantaneous imaging approaches, 2p-SLIPI and 1p-SLIPI (corresponding to two-phase and one-phase, respectively), have been developed. In the 2p-SLIPI optical setup, the “lines structure” is optically shifted by exploiting the birefringence property of a calcite crystal. This novel optical approach is used to image spray dynamics in ethanol and butanol DISI sprays at liquid fuel injection pressures of 80 and 160 bar, where the spray chamber is operated at 2-bar air pressure. Finally, the results from instantaneous 2p-SLIPI and 1p-SLIPI imaging have been compared, showing promising applications for the study of spray dynamics.
Download or read book The Second International Microgravity Combustion Workshop written by and published by . This book was released on 1993 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simultaneous Measurements of Drop Size and Velocity in Large Scale Sprinkler Flows Using Laser Induced Fluorescence written by D. Everest and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Combustion Measurements written by Norman Chigier and published by CRC Press. This book was released on 1991-04-01 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book begins with an introduction to the general problems of making measurements in high temperature and a presentation of chemically reacting flow systems. It describes each instrument with the various diagnostic techniques and discusses measurements that have been made in furnaces, flames, and rocket engines. The detailed measurement techniques described in this book cover a wide spectrum of applications in combustion systems, including gas turbine, rocket measurement techniques that were developed in laboratories. Information obtained on detailed temperature, velocity, particle size, and gas concentration distribution is leading to improve understanding of the chemical combustion process and to design imporvements in combustors.
Download or read book Understanding Carbon Nanotubes written by Annick Loiseau and published by Springer. This book was released on 2006-08-29 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the foundations of carbon nanotube science, reviewing recent developments and prospects for practical application. Each chapter summarizes relevant concepts from physics, chemistry or materials science, followed by detailed reports on topics including polymorphism and mircostructure of carbon; synthesis and growth; structural analysis by electron microscopy; spectroscopic methods; electronic structure; transport; mechanical and surface properties of nanotubes and composites.
