Incoherent imaging of crystals using thermally scattered electrons
Open Access
- 9 May 1995
- journal article
- Published by The Royal Society in Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences
- Vol. 449 (1936), 273-293
- https://doi.org/10.1098/rspa.1995.0044
Abstract
The effect of initial droplet diameter on the burning rate of sooting fuels - nheptane and 1-chloro-octane - was examined experimentally at low gravity. A 1.2 s drop tower provided a low gravity environment to minimize buoyancy and achieve spherically symmetric flames for stationary droplets. Free-floating and fibre-supported droplets were burned, and both techniques gave matching results for droplets of similar initial diameter. Burning rate constants for both fuels were measured for a large number of droplets ranging from 0.4 to 1.1 mm in initial diameter. Results showed that burning rate constants decreased monotonically as the initial droplet diameter was increased above 0.6 mm for both fuels. This decrease was considered to be due to the observed increase in soot formation and accumulation in a shell-like structure inside the flame of the larger droplets. The increased collection of soot inside the larger droplet flames reduced the proportional heat release from the flame and may have acted as a barrier to heat transfer from the flame to the droplet. Flame-to-droplet diameter ratio increased monotonically with time, thus suggesting that quasi-steady combustion was not achieved. The flames and soot shells for 1-chloro-octane droplets with their lower burning rates remained closer to the droplet surface than similarly sized n-heptane droplets.Keywords
This publication has 25 references indexed in Scilit:
- An investigation of three-dimensional diffraction from 2Hb-MoS2Philosophical Magazine A, 1990
- Axial channeling radiation from MeV electronsNuclear Instruments and Methods in Physics Research, 1982
- MORE THAN A BROKEN HEARTThe Personnel and Guidance Journal, 1981
- Image Contrast And Localized Signal Selection TechniquesJournal of Microscopy, 1979
- Electron Microscopy of Individual AtomsPublished by Springer Science and Business Media LLC ,1979
- Scanning transmission electron microscopy of thin specimensUltramicroscopy, 1977
- The ProblemPublic Administration Review, 1970
- The current state of high resolution scanning electron microscopyQuarterly Reviews of Biophysics, 1970
- Dynamical calculation of thermal diffuse electron scatteringActa Crystallographica Section A, 1969
- The scattering of high energy electrons by the thermal vibrations of crystalsPhilosophical Magazine, 1965