This paper presents a computational study of entrainment characteristics in the near-field of gas jets under atmospheric and Diesel conditions and sprays under Diesel conditions. Computed flowfield information is used to estimate the rate of mass entrainment in the jet and derive the entrainment rate constant. The value of the entrainment rate constant is compared to experimental results in the literature. It is found that the computed values of the constant in the near-field are less than the values in the self-similar region of the jet with the values increasing monotonically from the orifice to the self-similar region. These results are consistent with experimental results. In the case of sprays, it is found that it is difficult to arrive at firm conclusions because the results are sensitive to several parameters that are not well known and to the numerics. The computed results for sprays are also discussed relative to measurements in sprays quoted in the literature. [S0098-2202(00)00802-6]
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June 2000
Technical Papers
A Study of Near-Field Entrainment in Gas Jets and Sprays Under Diesel Conditions
Scott Post, Research Assistant,
Scott Post, Research Assistant
School of Mechanical Engineering Purdue University, West Lafayette, IN 17906
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Venkatraman Iyer, Research Assistant,
Venkatraman Iyer, Research Assistant
School of Mechanical Engineering Purdue University, West Lafayette, IN 17906
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John Abraham, Associate Professor
John Abraham, Associate Professor
School of Mechanical Engineering Purdue University, West Lafayette, IN 17906
Search for other works by this author on:
Scott Post, Research Assistant
School of Mechanical Engineering Purdue University, West Lafayette, IN 17906
Venkatraman Iyer, Research Assistant
School of Mechanical Engineering Purdue University, West Lafayette, IN 17906
John Abraham, Associate Professor
School of Mechanical Engineering Purdue University, West Lafayette, IN 17906
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division January 21, 1999; revised manuscript received December 20, 1999. Associate Technical Editor: C. L. Merkle.
J. Fluids Eng. Jun 2000, 122(2): 385-395 (11 pages)
Published Online: December 20, 1999
Article history
Received:
January 21, 1999
Revised:
December 20, 1999
Citation
Post, S., Iyer, V., and Abraham, J. (December 20, 1999). "A Study of Near-Field Entrainment in Gas Jets and Sprays Under Diesel Conditions ." ASME. J. Fluids Eng. June 2000; 122(2): 385–395. https://doi.org/10.1115/1.483268
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