Loading...
Please wait, while we are loading the content...
Similar Documents
The behavior of fuel-lean premixed flames in a standard flammability limit tube under controlled gravity conditions
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wherley, B. L. Strehlow, R. A. |
| Copyright Year | 1986 |
| Description | Fuel-lean flames in methane-air mixtures from 4.90 to 6.20 volume percent fuel and propane-air mixtures from 1.90 to 3.00 volume percent fuel were studied in the vicinity of the limit for a variety of gravity conditions. The limits were determined and the behavior of the flames studied for one g upward, one g downward, and zero g propagation. Photographic records of all flammability tube firings were obtained. The structure and behavior of these flames were detailed including the variations of the curvature of the flame front, the skirt length, and the occurrence of cellular instabilities with varying gravity conditions. The effect of ignition was also discussed. A survey of flame speeds as a function of mixture strength was made over a range of lean mixture compositions for each of the fuels studied. The results were presented graphically with those obtained by other researchers. The flame speed for constant fractional gravity loadings were plotted as a function of gravity loadings from 0.0 up to 2.0 g's against flame speeds extracted from the transient gravity flame histories for corresponding gravity loadings. The effects of varying gravity conditions on the extinguishment process for upward and downward propagating flames were investigated. |
| File Size | 23391438 |
| Page Count | 143 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860018667 |
| Archival Resource Key | ark:/13960/t26b21d7k |
| Language | English |
| Publisher Date | 1986-07-01 |
| Access Restriction | Open |
| Subject Keyword | Inorganic And Physical Chemistry Methane Photography Gravitational Effects Space Commercialization Premixed Flames Flammability Ignition Limits Flame Propagation Combustion Efficiency Fuel-air Ratio Propane Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
