Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Stratospheric Aircraft Exhaust Plume And Wake Chemistry
Download Stratospheric Aircraft Exhaust Plume And Wake Chemistry full books in PDF, epub, and Kindle. Read online Stratospheric Aircraft Exhaust Plume And Wake Chemistry ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722777678 Total Pages :68 pages Book Rating :4.7/5 (776 download)
Book Synopsis Stratospheric Aircraft Exhaust Plume and Wake Chemistry by : National Aeronautics and Space Administration (NASA)
Download or read book Stratospheric Aircraft Exhaust Plume and Wake Chemistry written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-16 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress to date in an ongoing study to analyze and model emissions leaving a proposed High Speed Civil Transport (HSCT) from when the exhaust gases leave the engine until they are deposited at atmospheric scales in the stratosphere is documented. A kinetic condensation model was implemented to predict heterogeneous condensation in the plume regime behind an HSCT flying in the lower stratosphere. Simulations were performed to illustrate the parametric dependence of contrail droplet growth on the exhaust condensation nuclei number density and size distribution. Model results indicate that the condensation of water vapor is strongly dependent on the number density of activated CN. Incorporation of estimates for dilution factors into a Lagrangian box model of the far-wake regime with scale-dependent diffusion indicates negligible decrease in ozone and enhancement of water concentrations of 6-13 times background, which decrease rapidly over 1-3 days. Radiative calculations indicate a net differential cooling rate of the plume about 3K/day at the beginning of the wake regime, with a total subsidence ranging between 0.4 and 1 km. Results from the Lagrangian plume model were used to estimate the effect of repeated superposition of aircraft plumes on the concentrations of water and NO(y) along a flight corridor. Results of laboratory studies of heterogeneous chemistry are also described. Kinetics of HCl, N2O5 and ClONO2 uptake on liquid sulfuric acid were measured as a function of composition and temperature. Refined measurements of the thermodynamics of nitric acid hydrates indicate that metastable dihydrate may play a role in the nucleation of more stable trihydrates PSC's. Miake-Lye, R. C. and Martinez-Sanchez, M. and Brown, R. C. and Kolb, C. E. and Worsnop, D. R. and Zahniser, M. S. and Robinson, G. N. and Rodriguez, J. M. and Ko, M. K. W. and Shia, R-L. Unspecified Center...
Book Synopsis Stratospheric Aircraft Exhaust Plume and Wake Chemistry by :
Download or read book Stratospheric Aircraft Exhaust Plume and Wake Chemistry written by and published by . This book was released on 1993 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stratospheric Aircraft Exhaust Plume and Wake Chemistry Studies by : National Aeronautics and Space Adm Nasa
Download or read book Stratospheric Aircraft Exhaust Plume and Wake Chemistry Studies written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-08 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents progress to date in an ongoing study to analyze and model emissions leaving a proposed High Speed Civil Transport (HSCT) from when the exhaust gases leave the engine until they are deposited at atmospheric scales in the stratosphere. Estimates are given for the emissions, summarizing relevant earlier work (CIAP) and reviewing current propulsion research efforts. The chemical evolution and the mixing and vortical motion of the exhaust are analyzed to track the exhaust and its speciation as the emissions are mixed to atmospheric scales. The species tracked include those that could be heterogeneously reactive on the surfaces of the condensed solid water (ice) particles and on exhaust soot particle surfaces. Dispersion and reaction of chemical constituents in the far wake are studied with a Lagrangian air parcel model, in conjunction with a radiation code to calculate the net heating/cooling. Laboratory measurements of heterogeneous chemistry of aqueous sulfuric acid and nitric acid hydrates are also described. Results include the solubility of HCl in sulfuric acid which is a key parameter for modeling stratospheric processing. We also report initial results for condensation of nitric acid trihydrate from gas phase H2O and HNO3. Miake-Lye, R. C. and Martinez-Sanchez, M. and Brown, R. C. and Kolb, C. E. and Worsnop, D. R. and Zahniser, M. S. and Robinson, G. N. and Rodriguez, J. M. and Ko, M. K. W. and Shia, R-L. Unspecified Center AIR POLLUTION; ATMOSPHERIC CHEMISTRY; EXHAUST EMISSION; EXHAUST GASES; PLUMES; STRATOSPHERE; SUPERSONIC TRANSPORTS; WAKES; HYDRATES; HYDROCHLORIC ACID; ICE; NITRIC ACID; NITROGEN OXIDES; REACTIVITY; SOLUBILITY; SOOT; SULFURIC ACID; VORTICES; WATER...
Book Synopsis Stratospheric Aircraft Exhaust Plume and Wake Chemistry Studies by :
Download or read book Stratospheric Aircraft Exhaust Plume and Wake Chemistry Studies written by and published by . This book was released on 1992 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Atmospheric Effects of Stratospheric Aircraft by : Richard S. Stolarski
Download or read book The Atmospheric Effects of Stratospheric Aircraft written by Richard S. Stolarski and published by . This book was released on 1995 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Atmospheric Effects of Stratospheric Aircraft: A First Program Report by : Michael J. Prather
Download or read book The Atmospheric Effects of Stratospheric Aircraft: A First Program Report written by Michael J. Prather and published by . This book was released on 1992 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Chemistry and Diffusion of Aircraft Exhausts in the Lower Stratosphere During the First Few Hours After Fly-by by :
Download or read book The Chemistry and Diffusion of Aircraft Exhausts in the Lower Stratosphere During the First Few Hours After Fly-by written by and published by . This book was released on 1974 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Atmospheric Effects of Stratospheric Aircraft by : Richard S. Stolarski
Download or read book The Atmospheric Effects of Stratospheric Aircraft written by Richard S. Stolarski and published by . This book was released on 1993 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmospheric Effects of Stratospheric Aircraft by :
Download or read book Atmospheric Effects of Stratospheric Aircraft written by and published by . This book was released on 1994 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1993 with total page 1786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Atmospheric Effects of Stratospheric Aircraft by :
Download or read book The Atmospheric Effects of Stratospheric Aircraft written by and published by . This book was released on 1992 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Reference Publication written by and published by . This book was released on 1977 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Micro-physical Modeling of Aircraft Exhaust Plumes and Condensation Trails by : Thibaud M. Fritz
Download or read book Micro-physical Modeling of Aircraft Exhaust Plumes and Condensation Trails written by Thibaud M. Fritz and published by . This book was released on 2018 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to quantitatively assess the environmental impacts of air transport operations is necessary to estimate their current and future impacts on the environment. Emissions from aircraft engines are a significant contributor to atmospheric NOx driving climate change, air quality impacts and other environmental concerns. To quantify these effects, global chemistry-transport models are frequently used. However, such models assume homogeneous and instant dilution into large-scale grid cells and therefore neglect micro-physical processes, such as contrail formation, occurring in aircraft wakes. This assumption leads to inaccurate estimates of NOy partitioning, and thus, an over-prediction of ozone production. To account for non-linear plume processes, a Lagrangian aircraft plume model has been implemented. It includes a unified tropospheric-stratospheric chemical mechanism that incorporates heterogeneous chemistry. Micro-physical processes are considered throughout the entire plume lifetime. The dynamics of the plume are solved simultaneously using an operator splitting method. The plume model is used to quantify how the in-plume chemical composition is affected in response to various environmental conditions and different engine and/or fuel characteristics. Results demonstrate that an instant dilution model overestimates ozone production and accelerates conversion of nitrogen oxides compared to the plume model. Sensitivities to the NOx emission index have been derived and the dependence of the plume treatment on the background atmosphere mixing ratios, pressure and latitude has been investigated for a future regional scale assessment of the aviation sector. The cumulative impact of successive flights has been estimated. Contrail micro-physical and chemical properties have been computed under different scenarios. This aircraft plume model has been extensively validated and enables an in-depth assessment of the impact of one or multiple flights on local atmospheric conditions.
Book Synopsis The Atmospheric Effects of Stratospheric Aircraft by :
Download or read book The Atmospheric Effects of Stratospheric Aircraft written by and published by . This book was released on 1991 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Note written by and published by . This book was released on 1973 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
