The results of a systematic experimental investigation of compressible flows through rectangular orifices, in particular the effects of the variables transverse length/height, a/b, and axial length/equivalent diameter, l/de, are presented and discussed. Non-monotonic changes in the mass flow rates due to changes in these variables are revealed by normalization using circular orifice data allowing the experimental results to be interpolated over a continuum of each of variables, namely, 1≤a/b≤300 and 03≤l/de<<3.0. A universal prediction for circular orifices is also given.
Get full access to this article
View all access options for this article.
References
1.
WallaceF.J.MitchellR.W.S., “Wave action following the sudden release of air through an engine port system”, Proc. I. Mech. E., Vol. 1B, 1952–53, pp. 343.
2.
BensonR.S., “Experiments on two-stroke engine exhaust ports under steady and unsteady flow conditions”, Proc. I. Mech. E., Vol. 173, (No. 19), 1959, pp. 511.
3.
McCabeA., “An experimental investigation of a plane subsonic jet with an aspect ratio of 3”, Proc. I. Mech. E., 182, Pt. 3H, p. 342.
4.
FossJ.F.JonesJ.B., “Secondary flow effects in a bounded rectangular jet”, A.S.M.E., J. Basic Eng., June 1968, p. 241.
5.
CallaghanE.E.BowdenD.T., “Investigation of flow coefficients in circular, square and elliptical orifices at high pressure ratios”, NACA, Tech. Note 1947, 1949.
6.
DeckkerB.E.L.ChangY.F., “An investigation of steady compressible flow through thick orifices”, Proc. I. Mech. E., 180, Pt. 3J, 1965–66, p. 312.
7.
LwinS., 1968, Unpublished work. Department of Mechanical Engineering, University of Saskatchewan.
8.
HegnaH.A.BermanA.S., “Rarefied gas flow through a slit”, Phys. Fluids, 15, 1972, p. 1850.
9.
ChangY.F., 1966, Unpublished work, Department of Mechanical Engineering, University of Saskatchewan.
