Some effects of air flow on the penetration and distribution of oil sprays Page: 2 of 26
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3 1176 01431 9272
NATIONAL ADVISORY COC.ITTEE FOR AERONAUTICS.
TECHNICAL NOTE NO. 329.
SOiE EFFECTS OF AIR FLOW ON THE PENETRATION AND
DISTRIBUTION OF OIL SPRAYS.
By A. M. Rothrock and E. G. Beardsley.
Tests were made at the Langley Memorial Aeronautical Labor-
aotry, Langley Field, Virginia, to determine the effects of air
flow on the characteristics of oil sprays from fuel injection
valves. The work was done with the N.A.C.A. Spray Photography
Equipment, the spray chamber of which was altered to simulate an
oil engine combustion chamber of the vertical disk type. Air
under pressure was admitted to the spray chamber at a rate which
gave a static pressure of 200 lb. per sq.in. and a maximum ve-
locity in the chamber of 59 ft. per sec. The air was discharged
through holes either at the sides of the chamber or at the end
of the chamber. The fuel oil was injected at 6000 lb. per sq.in.
pressure. Four nozzles were tested,-one containing seven ori-
fices and three containing single orifices with diameters of
0.006, 0.012, and 0.022 in., respectively.
Curves and photographs are presented showing the air flow
throughout the chamber and the effects of the air flow on the
fuel spray characteristics. It was found that the moving air '
had little effect on the spray penetration except with the 0.006
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Rothrock, A. M. & Beardsley, E. G. Some effects of air flow on the penetration and distribution of oil sprays, report, December 1929; (digital.library.unt.edu/ark:/67531/metadc54013/m1/2/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.