2 edition of Entrainment in deflected axisymmetric jets at various angles to the stream found in the catalog.
Entrainment in deflected axisymmetric jets at various angles to the stream
J L. Platten
|Statement||[by] J.L.Platten and J.F. Keffer.|
|Series||Technical publications series -- 6808.|
|Contributions||Keffer, J F., University of Toronto. Department of Mechanical Engineering.|
through which the jet exhausts. The angle of inclination of the jet to the crosswind direction has varied from 90 to 15 deg. It was found that the lift loss, the jet deflection, the jet penetration, and the rate of total pressure decay along the jet path decreased as the jet inclination was reduced from the position normal to the crosswind. Interior Angle = ° 12″ Back Forward Line Deflection Angle = ° 12′ – ° = 32° 12′ to the right. In the figure 8, it is transparent that the driving lead nonlinearly augmented from 1. type ﬂaps at various azimuthal angles and angles of attack.
Plate, normal to jet q 90o-q Plate, inclined to jet, angle (90o-q) •It is helpful to consider components of the velocity and force vectors perpendicular and parallel to the surface of the plate. K. ALASTAL 13 CHAPTER 5: MOMENTUM EQUATION AND ITS APPLICATIONS FLUID MECHANICS, IUG-Nov. Force Exerted by a jet striking a Flat Plate. Search the history of over billion web pages on the Internet.
It should be noted that many problems involve axisymmetric geometries but non-axisymmetric loadings, and vice versa. These problems are not axisymmetric. An example is shown in Fig. (the problem involves a plane axisymmetric geometry). 1 the rotation induces a stress in the disk 2 the rest of the cylinder is coming out of, and into, the page. objectives for ejector design depending on application as follows: I. INTRODUCTIONA jet ejector is a device in which suction, mixing and 1) To get large entrainment of the secondary sion of secondary fluid is done by utilizing the 2) To produce intense mixing between the two c energy of a motive (primary) fluid.
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J.L. Platten, J.F. KefferEntrainment in deflected axisymmetric jets at various angles to the stream Tech. Rep.Department of Mechanical Engineering, University of Cited by: 4.
Entrainment in Deflected Axisymmetric Jets at Various Angles to the Stream,” University of Toronto, Mechanical Engineering Department, Report No. UTME-TP Hill, B. J.,“ Measurement of Local Entrainment Rate in the Initial Region of Axisymmetric Turbulent Jets,”Cited by: This method also predicts well the axes for the oblique jets of Platten and Keffer.Entrainment in Deflected Axisymmetric Jets at Various Angles to the Stream, Technical ReportDepartment of Mechanical Engineering University of Toronto.
(See also Platten, J. and Keffer, J. F., Deflected Turbulent Jet Flows, Trans. ASME Cited by: 5. Lastly due to mass entrainment, the jet grows in radius in the axial direction of flow.
Platten, J.L., Keffer, J.F., Entrainment in deflected axisymmetric jets at various angles to the stream. Tech. Rep.Department of Mechanical Engineering, University of Toronto. Google Scholar. Putnam, A R.
GaneshInfluence of free stream velocity on the entrainment by single- and two-phase axi-symmetric jet. AIChE Journal. The jet in a half-space is generally characterized by mass M and momentum F fluxes (see Fig. 1) provided by its source that can be, for example, an orifice.
The focus of the present study is the outer entrainment flow around the jet. Therefore, possible specific thermal and kinetic processes near the jet source are not considered.
Flowlields of the M jet impinging on an inclined flat plate at various plate angles, nozzle-plate distances, and pressure ratios are experimentally investigated using pressure-sensitive paints. The lip of the jet was equipped with a small flap deflected away from the stream at an angle of 30°, that incorporated a flow control slot through which steady suction, oscillatory suction and zero mass-flux perturbations were introduced.
The central bleed jet in an axisymmetric, compressible base flow with a Mach free stream was visualized using an acetone planar laser-induced fluorescence (PLIF) technique. Three bleed flow rates, a low-bleed case (I=) and two others that bracket the optimal bleed case (I= and I=), were examined.
The injection parameter, I, is defined here as the bleed mass flow rate. Laboratory investigations of jets penetrating into a quiescent ﬂuid of the same density (e.g., Figure ) consistently reveal that the envelope containing the turbu-lence caused by the jet adopts a nearly conical shape.
In other words, the radius R of the jet is proportional to the distance x downstream from the discharge location. The jet exit diameter plays an indirect role through its effect on the jet momentum Jo. l 14 ~ ~ Free Surface \ / UmN / Figure 2.
Far field scaling of the free surface jet The similarity scaling in the far field of the turbulent axisymmetric jet has been discussed by several authors (e.g., Rajaratnam ~. Fluidic switches characterized by a first divergent region immediately downstream of a nozzle throat and a second downstream region of reduced divergence which will be contacted by a deflected jet.
The switches of the present invention include control ports which are normally open to the ambient atmosphere, the ports being located at or near the free stream separation point, and the transition.
Hoult, Fay, and Forney (15) assumed two entrainment mechanisms, one due to the difference between the jet velocity and the velocity component of the external stream parallel to the jet trajectory, and the other due to the component of the external stream normal to the jet trajectory.
They do not use a. Antonia, R.A. and Bilger, R.W. The prediction of the axisymmetric turbulent jet issuing into a co-flowing stream. Aeronaut Quart., 26, 69– Google Scholar. An experimental study of elevated round jets deflected in a crosswind.
Experimental Thermal and Fluid Science, Vol. 27, No. 1 Trajectory and entrainment of a round jet in crossflow. Physics of Fluids, Vol. 10, No. 9 The scalar concentration field of the axisymmetric jet in crossflow. Solution Manual - Fluid Mechanics 4th Edition - Frank M.
White. If the angle between the jet axis and the direction of the free -stream velocity a goes to zero for a given value of V^/V^, the condition exists of a jet in a cof lowing stream, that is, where the jet flow is parallel to the free stream.
If the jet velocity becomes very large (Vi/V^ -^ «) for a given a, the situation approaches that of a free jet. Davoust, J.L. Achard and M. El Hammoumi, Air entrainment by a plunging jet: the dynamical roughness concept and its estimation by a light absorption technique, International Journal of Multiphase Flow, 28, 9, (), ().
Nozzle profiles selected are circular, elliptical and conical having different area ratios. The mean diameter of nozzle is varied from 4 mm to 10mm. The present studies helps in predicting the more suitable geometry to get better efficiency if swirling jet are used instead of axial jet.
Keywords: Jet pump, axisymmetric, swirling jet. to the free-stream flow, the velocity is still only 50% of the free-stream value. 10 At every point on the surface of the sphere there is a definite value of fluid pressure (normal force per unit area) and of viscous shear stress (tangential force per unit area).
These values also come from Stokes’ solution for creeping flow around a sphere.Detailed knowledge of jet plume development in the near-field (the first 10–15 nozzle exit diameters for a round jet) is important in aero-engine propulsion system design, e.g., for jet noise and plume infrared (IR) signature assessment.
Nozzle exit Mach numbers are often high subsonic but improperly expanded (e.g., shock-containing) plumes also occur; high Reynolds numbers (O ()) are.Z0 height of jet above bed U velocity of the jet Z distance of maximum scour R rim maximum Zcore length of the core b width of the jet Uc jet velocity at centerline Um Umax maximum jet velocity height of U in a wall jet angle from vertical displacement of impingement, for deflected jet Yf height of forward deflected flow height of back.