A Study of Feedback Fluid Jet Oscillator With a Supersonic Power Jet: Part II: Analytical Study of Its Characteristics

1973 ◽  
Vol 95 (2) ◽  
pp. 185-190 ◽  
Author(s):  
J. D. McGeachy ◽  
W. L. Chow
Keyword(s):  
Experimental Data ◽  
Steady Flow ◽  
Analytical Study ◽  
Oscillator Model ◽  
General Behavior ◽  
Analytical Results ◽  
Flow Phenomena ◽  
Good Agreement

The study of the flow phenomena occurring within a feedback fluidic jet oscillator (see reference [2]) was continued on the basis of the quasi-steady flow concept. Description and explanation of these phenomena throughout the oscillating cycle were possible in view of the reasonably good agreement between the analytical results and experimental data. The characteristic pressures within the system prior to switching can be correlated and predicted. For a particular oscillation geometry, the required primary pressure to start jet switching and oscillation can also be estimated. A simplified oscillator model has also been suggested to illustrate the general behavior of such a feedback oscillator.

Experiment and Analysis of Instability of Tube Rows Subject to Liquid Crossflow

1982 ◽  
Vol 49 (4) ◽  
pp. 704-709 ◽  
Author(s):  
S. S. Chen ◽  
J. A. Jendrzejczyk
Keyword(s):  
Experimental Data ◽  
Analytical Study ◽  
Displacement Mechanism ◽  
Analytical Results ◽  
Damping Parameter ◽  
Good Agreement

A tube array subjected to crossflow may become unstable by either one or both of the two basic mechanisms: velocity mechanism and displacement mechanism. An experimental and analytical study of tube rows in liquid crossflow is performed to verify the existence and transition between the two mechanisms at the intermediate values of mass-damping parameter. Experimental data and analytical results are found to be in good agreement.

Numerical Simulation of the Viscous Flow for the Supersonic Jet Element

2011 ◽  
Vol 189-193 ◽  
pp. 2362-2365
Author(s):  
Yong Yu ◽  
Guo Qing Zhang ◽  
Fei Wang
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Unsteady Flow ◽  
Viscous Flow ◽  
Steady Flow ◽  
Supersonic Jet ◽  
Calculated Data ◽  
Numerical Precision ◽  
Good Agreement

The viscous flow of the supersonic jet element was simulated numerically based on CFD technology, and many tests have been done to verify the numerical precision. The results show that the calculated data are good agreement with the experimental data. So the numerical simulation of the viscous flow for the supersonic jet element is accurate and reliable, and it can be applied to investigate the steady flow and unsteady flow in supersonic jet element.

Modeling of the costs of the phases of the water-oil mixture in the ascending streams

2006 ◽  
Vol 4 ◽  
pp. 145-155
Author(s):  
A.M. Ilyasov
Keyword(s):  
Experimental Data ◽  
Steady Flow ◽  
Multiphase Systems ◽  
Good Agreement

The steady flow of a water-oil dispersion mixture in an oil producing well is simulated in the paper. On the basis of the equations of mechanics of multiphase systems, a model is proposed for predicting the phase costs in the ascending stream. For stabilized, almost vertical flows, a good agreement with the experimental data was obtained.

An Investigation of Ejector Design by Analysis and Experiment

1950 ◽  
Vol 17 (3) ◽  
pp. 299-309
Author(s):  
J. H. Keenan ◽  
E. P. Neumann ◽  
F. Lustwerk
Keyword(s):  
Experimental Data ◽  
Constant Pressure ◽  
Jet Pump ◽  
Pump Design ◽  
One Dimensional ◽  
Analytical Results ◽  
Constant Area ◽  
Jet Pumps ◽  
Good Agreement

Abstract A one-dimensional method of analysis of jet pumps or ejectors is presented. The analysis considers mixing of the primary and secondary streams at constant pressure, and mixing of the streams at constant area. For the analytical conditions considered, better performance can be obtained when constant-pressure mixing is employed. A comparison between experimental and analytical results shows good agreement over a broad range of variables. Some experimental data on the length of tube required for mixing of the two streams are presented. A method for jet-pump design is given.

scholarly journals Numerical analysis of a steady flow in a non-uniform capillary

2020 ◽  
Vol 24 (4) ◽  
pp. 2385-2391
Author(s):  
Ya-Ping Li ◽  
Li-Li Wang ◽  
Jie Fan
Keyword(s):  
Experimental Data ◽  
Finite Element Method ◽  
Finite Element ◽  
Porous Media ◽  
Steady Flow ◽  
Geometrical Structure ◽  
Geometrical Parameters ◽  
The Finite Element Method ◽  
The Given ◽  
Good Agreement

Fluids in porous media driven by the capillary force are greatly affected by capillary?s geometrical structure. The steady flow in a non-uniform capillary is numerically analyzed by the finite element method. With the given initial and boundary conditions, the flow velocity distribution with different geometrical parameters is obtained, and the result is in a good agreement with the experimental data.

Computational Study of the Flow Around a Ducted Tip Hydrofoil

2002 ◽  
Author(s):  
Hildur Ingvarsdottir ◽  
Carl Ollivier-Gooch ◽  
Sheldon I. Green
Keyword(s):  
Experimental Data ◽  
Aspect Ratio ◽  
Flow Pattern ◽  
Steady Flow ◽  
Cross Section ◽  
Turbulence Model ◽  
Numerical Solutions ◽  
Computational Study ◽  
Flow Solver ◽  
Good Agreement

Steady flow over rounded and ducted tip hydrofoils has been studied computationally using the CFDRC-ACE(U) flow solver and a k-ε turbulence model. The flow domains were gridded with a combination of C-H, H-H, tetrahedral and prism grid blocks and mesh sizes ranged from 350,000–550,000 cells. A good agreement in flow pattern was achieved between the numerical solutions and available experimental data. The computations show that the ducted tip hydrofoil sheds less bound circulation over the majority of the wing span than does a rounded tip hydrofoil with the same cross section and aspect ratio. Observation of the streamwise component of vorticity immediately downstream of the different hydrofoils shows that the vorticity from the ducted tip hydrofoil is shed in the shape of a duct instead of the concentrated circular vortex shed by the rounded tip hydrofoil.

Laser Induced Temperature Rise In Semiconductors : Analytical Solutions, Application to the Transient

1983 ◽  
Vol 13 ◽  
Author(s):  
Alain Maruani ◽  
Y.I. Nissim ◽  
F. Bonnouvrier ◽  
D. Paquet
Keyword(s):  
Experimental Data ◽  
Analytical Solutions ◽  
Temperature Rise ◽  
Laser Heating ◽  
Integral Transforms ◽  
Surface Absorption ◽  
Cw Laser ◽  
Analytical Results ◽  
Good Agreement

ABSTRACTIt is shown how the systematic use of the method of integral transforms greatly simplifies the calculation of the temperature rises in laser irradiated media. In general, this method leads ultimately either to analytical results or to very simple numerical integrals (e.g. no poles, exponential kernels). We focus here on the analytical results, and discuss some aspects of CW laser heating, for large surface absorption, including radial dependance, depth dependance and transient nonlinearities. The new results derived in this treatment are in good agreement with experimental data from other studies.

Energy Levels and Electromagnetic Transition of 90-94mo Nuclei Using Ibm-1

2020 ◽  
pp. 149-152
Keyword(s):  
Experimental Data ◽  
Transition Probability ◽  
Energy Levels ◽  
Dynamical Symmetry ◽  
Interacting Boson Model ◽  
Excitation Energies ◽  
Electromagnetic Transition ◽  
Boson Model ◽  
Energy States ◽  
Good Agreement

The energy states for the J , b , ɤ bands and electromagnetic transitions B (E2) values for even – even molybdenum 90 – 94 Mo nuclei are calculated in the present work of "the interacting boson model (IBM-1)" . The parameters of the equation of IBM-1 Hamiltonian are determined which yield the best excellent suit the experimental energy states . The positive parity of energy states are obtained by using IBS1. for program for even 90 – 94 Mo isotopes with bosons number 5 , 4 and 5 respectively. The" reduced transition probability B(E2)" of these neuclei are calculated and compared with the experimental data . The ratio of the excitation energies of the 41+ to 21+ states ( R4/2) are also calculated . The calculated and experimental (R4/2) values showed that the 90 – 94 Mo nuclei have the vibrational dynamical symmetry U(5). Good agreement was found from comparison between the calculated energy states and electric quadruple probabilities B(E2) transition of the 90–94Mo isotopes with the experimental data .

Predicting the Effect of Tire Tread Pattern Design on Thick Film Wet Traction

1977 ◽  
Vol 5 (1) ◽  
pp. 6-28 ◽  
Author(s):  
A. L. Browne
Keyword(s):  
Experimental Data ◽  
Network Design ◽  
Thick Film ◽  
Digital Computer ◽  
Analytical Tool ◽  
Design Practice ◽  
Pattern Design ◽  
Performance Results ◽  
Good Agreement

Abstract An analytical tool is presented for the prediction of the effects of changes in tread pattern design on thick film wet traction performance. Results are reported for studies in which the analysis, implemented on a digital computer, was used to determine the effect of different tread geometry features, among these being the number, width, and lateral spacing of longitudinal grooves and the angle of zigzags in longitudinal grooves, on thick film wet traction. These results are shown to be in good agreement with experimental data appearing in the literature and are used to formulate guidelines for tread groove network design practice.

A New Condition of Formation and Stablity of All Crystalline Systems in a Good Agreement with Experimental Data

2015 ◽  
Vol 11 (3) ◽  
pp. 3224-3228
Author(s):  
Tarek El-Ashram
Keyword(s):  
Experimental Data ◽  
Brillouin Zone ◽  
Electron Concentration ◽  
Free Electron ◽  
Lattice Point ◽  
Valence Electron ◽  
Fermi Gas ◽  
Valence Electron Concentration ◽  
Fermi Sphere ◽  
Good Agreement

In this paper we derived a new condition of formation and stability of all crystalline systems and we checked its validity andit is found to be in a good agreement with experimental data. This condition is derived directly from the quantum conditionson the free electron Fermi gas inside the crystal. The new condition relates both the volume of Fermi sphere VF andvolume of Brillouin zone VB by the valence electron concentration VEC as ;𝑽𝑭𝑽𝑩= 𝒏𝑽𝑬𝑪𝟐for all crystalline systems (wheren is the number of atoms per lattice point).

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