Last edited by Gujar
Sunday, July 26, 2020 | History

3 edition of Rectangular subsonic jet flow field measurements found in the catalog.

Rectangular subsonic jet flow field measurements

# Rectangular subsonic jet flow field measurements

Written in English

Subjects:
• Aerodynamics.

• Edition Notes

The Physical Object ID Numbers Statement G. L. Morrison and D. H. Swan. Series NASA-CR -- 185962., NASA contractor report -- NASA CR-185962. Contributions Swan, D. H., United States. National Aeronautics and Space Administration. Format Microform Pagination 1 v. Open Library OL15280932M

Numerical investigation on the three-dimensional flow characteristics of unsteady subsonic elliptic jet. The total mass Q m formed in the entire starting flow field of the unsteady jet is defined as (13) Q m = For rectangular jet, it combine the corner features of square jet with the aspect ratio features of an elliptic jet, which Cited by: 2. The flow field of a small nitrogen jet (5 mm diameter) injected into a cross flow of air at a momentum-flux ratio of 16 was explored in the plane of the trajectory by means of a laser-Doppler technique. Several traverses were made at right angles to the jet center line obtained from Cited by:

15th International Conference on Fluid Control, Measurements and Visualization May , Naples, Italy Paper ID 1 Numerical simulation of supersonic-supersonic shear flow mixing enhancement based on transverse jet Liu Yang1, *, Ma Dong1, Yu Xiao-jing2, Chai Ze-xin1 1Science and Technology on Combustion, Internal Flow and Thermo-structure Laboratory, NorthwesternFile Size: 1MB.   Subsonic flow of approximately Mach over cavities with L/D ratios of and were studied experimentally using particle image velocimetry (PIV), surface pressure measurements, and hot-wire measurements. The incoming boundary layer was turbulent in both cases. The PIV data was analyzed to yield mean flow characteristics, vorticity field information, and two-point statistics for Cited by:

OBSERVATIONS OF THE FLOW FROM A RECTANGULAR NOZZLE bY A. G. Kurn SUMMARY An experimental investigation is described of the flow from two rectangular nozzles, for the pressure ratio (Hj/P,> range up to 3, blowing into still air and into a stream flowing in the same direction as the jet . A rig was set up to investigate the injection of liquid jet in subsonic cross flow with a rectangular test section of cross section measuring mm by mm. Experiments were done with a two injector configurations a circular mm diameter plain orifice injector and a elliptic injector with an equivalent effective area of mm (minor axis Author: Ather Uzair Alvi, Amit Thakur, Srinivas Jangam, Pratheesh Kumar P., Venkat S. Iyengar.

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Get this from a library. Rectangular subsonic jet flow field measurements. [Gerald L Morrison; D H Swan; United States. National Aeronautics and Space Administration.]. This report presents flow field measurements of three subsonic rectangular cold air jets.

The three cases presented had aspect ratios of ix2, ix4 at a Mach number of and an aspect ratio of Ix2 at a Mach number of All measurements were made using a three dimensional laser Doppler anemometer system.

Flow field measurements of three subsonic rectangular cold air jets are presented. The three cases had aspect ratios of 1x2, 1x4 at a Mach number of and an aspect ratio of 1x2 at a Mach number of All measurements were made using a 3-D laser Doppler anemometer : Gerald L.

Morrison, David H. Swan. Flow field measurements are presented of 3 subsonic rectangular cold air jets. The 3 cases presented had aspect ratios of 1 x 2, 1 x 4 at a Mach number of and an aspect ratio of 1 x 2 at a Mach number of All measurements were made using a 3-D laser Doppler anemoneter system.

Flow field measurements of three subsonic rectangular cold air jets are presented. The three cases had aspect ratios of 1x2, 1x4 at a Mach number of and an aspect ratio of 1x2 at a Mach number of All measurements were made using a 3-D laser Doppler anemometer : Gerald L.

Morrison and David H. Swan. Operation in the turbulent jet field of a linear array of rectangular jets using a normal two-dimensional jet (Variation of mean velocity field) Transactions of the JSME (in Japanese), Vol.

80, No. Cited by: An experimental investigation of the effects of nozzle ellipticity on the flow structure of co-flow jet diffusion flames Journal of the Brazilian Society of Mechanical Sciences, Vol.

23, No. 1 Three-Dimensional Simulation of Laminar Rectangular Impinging Jets, Flow Structure, and Heat TransferCited by: 2 in excess of 3× with exit Mach numbers up to and total temperatures up to K.

The M d=, convergent-divergent nozzle used in this study has a rectangular exit with aspect ratio and 10 mm in short dimension. Velocity Field Measurements Velocity field data were obtained by means of PIV Size: KB.

Results of hot-wire measurements in an incompressible rectangular jet issuing into a quiet surrounding at ambient conditions are presented. The quantities measured include distributions of mean velocity and the turbulence shear stresses in the two central planes of the jet at stations up to widths (small dimension of the nozzle) downstream of the nozzle by: a jet issuing from a moderate aspect ratio rectangular nozzle at flow speeds ranging from low subsonic to supersonic.

The detailed measurements of the mean and turbulent velocity components of an incompressible jet was reported by Krothapalli, et al., The effect of the exit Mach number on the overall flow field of a subsonic compressible File Size: 2MB.

Near field dynamics of subsonic free square jets. A computational and experimental study F. Grinsteina) Laboratory for Computational Physics and Fluid Dynamics, CodeNaval Research. Flow field measurements for a subsonic rectangular cold air jet with an aspect ratio of ( x mm) at a Mach number of and Re ofhave been carried out using a three-dimensional laser Doppler anemometer : G.

Morrison and D. Swan. Flow field measurements for a subsonic rectangular cold air jet with an aspect ratio of ( x mm) at a Mach number of and Re ofhave been carried out using a three-dimensional laser Doppler anemometer system.

Mean velocity measurements show that the jet width spreads more rapidly along the minor axis than along the major axis.

Mach number Mj = (acoustic Mach number Ma=) and (3) far-field sound pressure level measurements covering a range of subsonic Mach numbers for both the reflected and the shielded sides of the plate. (With microphones overhead, the reflected and shielded sides represent plate locations underneath and over the jet, respectively.)File Size: KB.

The rectangular jet has a 28 mm by mm exit, being equivalent to a hydrodynamic diameter, D, of 14 mm, which is the same as that of a round jet employed in the same series of studies[5,10].

The nozzle was connected to a compressed air supply and pressure controlled by a Fisher : X. Zhang. Measurements of the noise field from a 25 mm diameter subsonic air jet are presented. These results are analysed in some detail by determining both the jet velocity dependence and the directivity of the intensity of the radiation in 1/3-octave bands at particular values of the frequency parameter, $(fD/V_J)(1-M_c\cos\theta).$ This procedure should ensure that a particular source in a Cited by: wire measurements show that a compressible subsonic rectangular jet The previous investigation has revealed that the flow field of an incompressible rectangular jet can be characterized by the.

Flow field survey results for three rectangular nozzles are presented for a low subsonic condition obtained primarily by hot-wire anemometry. The three nozzles have aspect ratios ofand A fourth case included has aspect ratio with chevrons added to the long edges.

Data on mean velocity, turbulent normal and shear stresses as well as streamwise vorticity are presented covering. Flow over an open cavity was studied for several different subsonic free stream Mach numbers ranging from to nearly Velocity field information was acquired through an application of particle image velocimetry, while the fluctuating surface pressure was acquired through a linear array of surface pressure sensors.

These data were acquired on the centerline of the cavity which had a Cited by:. In this work, the numerical analysis and experimental measurements were made to investigate the development of top-hat flow field at atmospheric pressure in a circular symmetrical subsonic nozzle.

Measurements were carried out over a range of inlet velocities (about m/s) based on a nozzle with constant geometric parameters, which also provided verification for the Author: Han Zhang, Li Jia, Lishui Cui, Chunhui Li.A subsonic jet of air emanating from a rectuangular nozzle of aspect ratio has been investigated using hot-wire anemometry.

The purpose of this investiga-tion is to extend our knowledge of a rectangular jet from incompressible to com-pressible flow. Four exit Mach numbers, ranging from towere selected for the study.• M Subsonic & incompressible • Subsonic & compressible • flow – shock waves appear mixed subsonic and sonic flow regime • subsonic flow • M > – Hypersonic Flow, shock waves and other flow changes are very strongFile Size: 84KB.