An Experimental Study of Low-speed Concurrent-flow Flame Spread Over a Thin Fuel
Title | An Experimental Study of Low-speed Concurrent-flow Flame Spread Over a Thin Fuel PDF eBook |
Author | Gary David Grayson |
Publisher | |
Pages | 166 |
Release | 1991 |
Genre | |
ISBN |
An Experimental Study of Ignition Effects and Flame Growth Over a Thin Solid Fuel in Low-Speed Concurrent Flow Using Drop-Tower Facilities
Title | An Experimental Study of Ignition Effects and Flame Growth Over a Thin Solid Fuel in Low-Speed Concurrent Flow Using Drop-Tower Facilities PDF eBook |
Author | Richard Dale Pettegrew |
Publisher | |
Pages | 140 |
Release | 1996 |
Genre | |
ISBN |
An Experimental Study of Ignition Effects and Flame Growth Over a Thin Solid Fuel in Low-Speed Concurrent Flow Using Drop-Tower Facilities
Title | An Experimental Study of Ignition Effects and Flame Growth Over a Thin Solid Fuel in Low-Speed Concurrent Flow Using Drop-Tower Facilities PDF eBook |
Author | National Aeronautics and Space Administration (NASA) |
Publisher | Createspace Independent Publishing Platform |
Pages | 136 |
Release | 2018-07-17 |
Genre | |
ISBN | 9781722937218 |
An experimental study of ignition and flame growth over a thin solid fuel in oxidizer flow speeds from 0 to 10 cm/sec concurrent flow was performed. This study examined the differences between ignition using a resistively heated wire (woven in a sawtooth pattern over the leading edge of the fuel), and a straight resistively heated wire augmented by a chemical ignitor doped onto the leading edge of the fuel. Results showed that the chemical system yielded non-uniform ignition bursts, while the system using only the hotwire gave more uniform ignition. At speeds up to 2.5 cm/sec, the chemical system yielded non-uniform pyrolysis fronts, while the hotwire system gave more uniform pyrolysis fronts. At speeds of 5 cm/sec or greater, both systems gave uniform pyrolysis fronts. The chemically-ignited flames tended to become too dim to see faster than the hotwire-ignited flames, and the flame lengths were observed to be shorter (after the initial burst subsided) for the chemical system for all speeds. Flame and pyrolysis element velocities were measured. Temperature profiles for selected tests were measured using thermocouples at the fuel surface and in the gas phase. Comparisons between the flame element velocities and peak temperatures recorded in these tests with calculated spread rates and peak temperatures from a steady-state model are presented. Agreement was found to be within 20% for most flame elements for nominal velocities of 5 cm/sec and 7.5 cm/sec. Pettegrew, Richard Dale Glenn Research Center IGNITION; DIFFUSION FLAMES; PYROLYSIS; TEMPERATURE PROFILES; COMBUSTION; DROP TOWERS; VAPOR PHASES; TEMPERATURE MEASUREMENT; THERMOCOUPLES; IMAGE ANALYSIS; ERROR ANALYSIS; FLOW VELOCITY; STEADY STATE; IMAGING TECHNIQUES; OXIDIZERS; ELECTRIC WIRE; NONUNIFORMITY; SURFACE PROPERTIES; FUELS...
A Model of Concurrent Flow Flame Spread Over a Thin Solid Fuel
Title | A Model of Concurrent Flow Flame Spread Over a Thin Solid Fuel PDF eBook |
Author | Paul Vincent Ferkul |
Publisher | |
Pages | 160 |
Release | 1993 |
Genre | |
ISBN |
Microgravity Combustion
Title | Microgravity Combustion PDF eBook |
Author | Howard D. Ross |
Publisher | Elsevier |
Pages | 601 |
Release | 2001-09-03 |
Genre | Technology & Engineering |
ISBN | 0080549977 |
This book provides an introduction to understanding combustion, the burning of a substance that produces heat and often light, in microgravity environments-i.e., environments with very low gravity such as outer space. Readers are presented with a compilation of worldwide findings from fifteen years of research and experimental tests in various low-gravity environments, including drop towers, aircraft, and space.Microgravity Combustion is unique in that no other book reviews low- gravity combustion research in such a comprehensive manner. It provides an excellent introduction for those researching in the fields of combustion, aerospace, and fluid and thermal sciences.* An introduction to the progress made in understanding combustion in a microgravity environment* Experimental, theoretical and computational findings of current combustion research* Tutorial concepts, such as scaling analysis* Worldwide microgravity research findings
Fourth International Microgravity Combustion Workshop
Title | Fourth International Microgravity Combustion Workshop PDF eBook |
Author | |
Publisher | |
Pages | 546 |
Release | 1997 |
Genre | Combustion |
ISBN |
Concurrent Flow Flame Spread Study
Title | Concurrent Flow Flame Spread Study PDF eBook |
Author | Hai-Tien Loh |
Publisher | |
Pages | 318 |
Release | 1986 |
Genre | |
ISBN |