U.S. Department of EnergyOffice of Scientific and Technical Information
On the intact core of full-cone sprays
Abstract
A voltage was applied between the nozzle unit and fine needles, rods, and screens inserted at various axial and radial positions into atomizing full-cone water sprays and the corresponding electrical resistance was measured in an attempt to determine the shape and length of the intact liquid core. The parameters of the experiment were: room temperature; air compressed at 0.1, 1.0, and 2.9 MPa; injection ..delta..p = 13.7 MPa; and five straight-hole nozzles with diameters of 127, 178, 305, 343, and 508 ..mu..m, and the same length-to-diameter ratio of 4. The results show that current is carried not only by intact liquid cores but also by atomized unconnected sprays and even across such sprays. Thus the shape of the intact core could be deduced only in the vicinity of the nozzle exit. In the atomization regime, the length of the intact core is found to be proportional to the nozzle diameter and to increase as the square root of the liquid-to-gas density ratio, i.e. x/sub 1/=Rhod(p/sub lpg/)/sup 12/ where Rhoapprox. =7.
- Authors:
- Publication Date:
- OSTI Identifier:
- 5775513
- Report Number(s):
- TP-850126
- DOE Contract Number:
- AC04-81AL16338
- Resource Type:
- Book
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 33 ADVANCED PROPULSION SYSTEMS; FUEL INJECTION SYSTEMS; FUNCTIONAL MODELS; RESEARCH PROGRAMS; ATOMIZATION; DENSITY; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; GASES; HIGH PRESSURE; LENGTH; LIQUIDS; NOZZLES; SHAPE; SIMULATION; SPRAYS; TEMPERATURE DEPENDENCE; WATER VAPOR; DIMENSIONS; ELECTRICAL PROPERTIES; FLUIDS; FUEL SYSTEMS; PHYSICAL PROPERTIES; VAPORS; 330100* - Internal Combustion Engines
Citation Formats
Chehroudi, B, Chen, S H, Bracco, F V, and Onuma, Y. On the intact core of full-cone sprays. United States: N. p., 1985.
Web.
Chehroudi, B, Chen, S H, Bracco, F V, & Onuma, Y. On the intact core of full-cone sprays. United States.
Chehroudi, B, Chen, S H, Bracco, F V, and Onuma, Y. 1985.
"On the intact core of full-cone sprays". United States.
@article{osti_5775513,
title = {On the intact core of full-cone sprays},
author = {Chehroudi, B and Chen, S H and Bracco, F V and Onuma, Y},
abstractNote = {A voltage was applied between the nozzle unit and fine needles, rods, and screens inserted at various axial and radial positions into atomizing full-cone water sprays and the corresponding electrical resistance was measured in an attempt to determine the shape and length of the intact liquid core. The parameters of the experiment were: room temperature; air compressed at 0.1, 1.0, and 2.9 MPa; injection ..delta..p = 13.7 MPa; and five straight-hole nozzles with diameters of 127, 178, 305, 343, and 508 ..mu..m, and the same length-to-diameter ratio of 4. The results show that current is carried not only by intact liquid cores but also by atomized unconnected sprays and even across such sprays. Thus the shape of the intact core could be deduced only in the vicinity of the nozzle exit. In the atomization regime, the length of the intact core is found to be proportional to the nozzle diameter and to increase as the square root of the liquid-to-gas density ratio, i.e. x/sub 1/=Rhod(p/sub lpg/)/sup 12/ where Rhoapprox. =7.},
doi = {},
url = {https://www.osti.gov/biblio/5775513},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}