Coal-water slurry spray characteristics of a positive displacement fuel injection system
Abstract
Experiments have been completed to characterized coal-water slurry sprays from a modified positive displacement fuel injection system of a diesel engine. The injection system includes an injection jerk pump driven by an electric motor, a specially designed diaphragm to separate the abrasive coal from the pump, and a single-hole fuel nozzle. The sprays were injected into a pressurized chamber equipped with windows. High speed movies and instantaneous fuel line pressures were obtained. For injection pressures of order 30 MPa or higher, the sprays were similar for coal-water slurry, diesel fuel and water. The time until the center core of the spray broke-up (break-up time) was determined from both the movies and from a model using the fuel line pressures. Results from these two independent procedures were in good agreement. For the base conditions, the break-up time was 0.58 and 0.50 ms for coal-water slurry and diesel fuel, respectively. The break-up times increased with increasing nozzle orifice size and with decreasing chamber density. The break-up time was not a function of coal loading for coal loadings up to 53%. Cone angles of the sprays were dependent on the operating conditions and fluid, as well as on the time and location ofmore »
- Authors:
-
- Texas A and M Univ., College Station, TX (United States). Dept. of Mechanical Engineering
- Publication Date:
- Research Org.:
- General Electric Co., Erie, PA (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 10136513
- Report Number(s):
- DOE/MC/23174-94/C0319; CONF-920122-8
ON: DE94008973; BR: AA0510000/AA5525000
- DOE Contract Number:
- AC21-88MC23174
- Resource Type:
- Conference
- Resource Relation:
- Conference: American Society of Mechanical Engineers (ASME) energy sources technology conference and exhibition,Houston, TX (United States),26-30 Jan 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 33 ADVANCED PROPULSION SYSTEMS; 01 COAL, LIGNITE, AND PEAT; DIESEL ENGINES; FUEL SUBSTITUTION; FUEL INJECTION SYSTEMS; FUEL SLURRIES; ATOMIZATION; COAL; WATER; MIXTURES; DIESEL FUELS; COMBUSTION; SPRAYS; COMPARATIVE EVALUATIONS; 330800; 014000; 330102; ALTERNATIVE FUELS; DIESEL
Citation Formats
Seshadri, A K, Caton, J A, and Kihm, K D. Coal-water slurry spray characteristics of a positive displacement fuel injection system. United States: N. p., 1992.
Web.
Seshadri, A K, Caton, J A, & Kihm, K D. Coal-water slurry spray characteristics of a positive displacement fuel injection system. United States.
Seshadri, A K, Caton, J A, and Kihm, K D. 1992.
"Coal-water slurry spray characteristics of a positive displacement fuel injection system". United States. https://www.osti.gov/servlets/purl/10136513.
@article{osti_10136513,
title = {Coal-water slurry spray characteristics of a positive displacement fuel injection system},
author = {Seshadri, A K and Caton, J A and Kihm, K D},
abstractNote = {Experiments have been completed to characterized coal-water slurry sprays from a modified positive displacement fuel injection system of a diesel engine. The injection system includes an injection jerk pump driven by an electric motor, a specially designed diaphragm to separate the abrasive coal from the pump, and a single-hole fuel nozzle. The sprays were injected into a pressurized chamber equipped with windows. High speed movies and instantaneous fuel line pressures were obtained. For injection pressures of order 30 MPa or higher, the sprays were similar for coal-water slurry, diesel fuel and water. The time until the center core of the spray broke-up (break-up time) was determined from both the movies and from a model using the fuel line pressures. Results from these two independent procedures were in good agreement. For the base conditions, the break-up time was 0.58 and 0.50 ms for coal-water slurry and diesel fuel, respectively. The break-up times increased with increasing nozzle orifice size and with decreasing chamber density. The break-up time was not a function of coal loading for coal loadings up to 53%. Cone angles of the sprays were dependent on the operating conditions and fluid, as well as on the time and location of the measurement. For one set of cases studied, the time-averaged cone angle was 15.9{degree} and 16.3{degree} for coal-water slurry and diesel fuel, respectively.},
doi = {},
url = {https://www.osti.gov/biblio/10136513},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 31 00:00:00 EST 1992},
month = {Thu Dec 31 00:00:00 EST 1992}
}