Experimental Investigation of the Flow Between Corotating Disks

1970 ◽  
Vol 37 (3) ◽  
pp. 844-849 ◽  
Author(s):  
R. Adams ◽  
W. Rice
Keyword(s):  
Experimental Investigation ◽  
Laminar Flow ◽  
Uncertainty Analysis ◽  
Pressure Distribution ◽  
Analytical Model ◽  
Newtonian Fluid ◽  
Radial Pressure ◽  
Experimental Results ◽  
Wide Range ◽  
Incompressible Newtonian Fluid

Experimental results are presented for the flow of an incompressible Newtonian fluid, with full admission, between closely spaced corotating disks. The radial pressure distribution is shown to coincide very closely with analytical results for laminar flow earlier presented by other investigators, over a wide range of the parameters pertinent to the flow description. A referenced analytical model for laminar flow between corotating disks is thus given credence. The experimental arrangement and procedure are described and a supporting uncertainty analysis is presented.

Flow Regime Definition for Flow Between Corotating Disks

1974 ◽  
Vol 96 (1) ◽  
pp. 29-34 ◽  
Author(s):  
L. L. Pater ◽  
E. Crowther ◽  
W. Rice
Keyword(s):  
Experimental Data ◽  
Laminar Flow ◽  
Turbulent Flow ◽  
Flow Visualization ◽  
Pressure Distribution ◽  
Flow Regime ◽  
Radial Pressure ◽  
Distribution Data ◽  
Wide Range ◽  
Incompressible Newtonian Fluid

Experimental data and results are presented for the flow of an incompressible Newtonian fluid, with full admission, between closely spaced corotating disks, and for both radially inward and radially outward throughflows. The data consist of the measured radial pressure distribution together with flow visualization by means of injected dye, over a very wide range of parameters descriptive of the flows. From the data, the combinations of the parameters corresponding with laminar and with turbulent flow are determined; that is, the data are sufficient to define the flow regimes. Furthermore, for laminar flow, both the pressure distribution data and the flow visualization data confirm the adequacy of earlier analytical results for use in the design of practical devices incorporating these flows, such as multiple disk pumps and turbines.

Experimental investigation into transonic flows over tandem cavities

2001 ◽  
Vol 105 (1045) ◽  
pp. 119-124 ◽  
Author(s):  
N. Taborda ◽  
D. Bray ◽  
K. Knowles
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Mach Number ◽  
Pressure Distribution ◽  
Static Pressure ◽  
Transonic Flows ◽  
Wide Range ◽  
Different Dimensions

AbstractAn experimental study was conducted to analyse the pressure distribution along the floor of a cavity, with and without the presence of an upstream tandem cavity, at a constant freestream Mach number of about 0-911. Measurements were made for single cavities and the results compared with those obtained in the presence of an upstream tandem cavity. This comparison was made over a wide range of geometries, covering open to closed classes of cavities with both identical and different dimensions for the two cavities. The effect of the spacing between the two cavities was also studied. The downstream cavity is shown to be significantly affected by the presence of an upstream cavity, with both the overall net static pressure and its gradient being affected, dependent upon the class of cavity geometry and spacing under consideration.

General Instability of Shallow-Stiffened Orthotropic Cylinders Under Hydrostatic Pressure

1967 ◽  
Vol 11 (02) ◽  
pp. 117-122
Author(s):  
R. Milligan ◽  
C. Lakshmikantham ◽  
G. Gerard
Keyword(s):  
Experimental Investigation ◽  
Hydrostatic Pressure ◽  
Stability Theory ◽  
Geometric Parameters ◽  
Experimental Results ◽  
Loading Conditions ◽  
Wide Range ◽  
General Program

As a part of a general program to determine the applicability of linear orthotropic stability theory to the design of stiffened cylinders under various loading conditions, a theoretical and experimental investigation was performed on the general instability of orthotropic cylinders under hydrostatic pressure. Experimental results obtained herein have shown that the use of linear orthotropic theory results in accurate predictions of cylinder stability over a wide range of geometric parameters.

Approximate Calculation of Pressure Drop in Laminar Flow of Generalized Newtonian Fluid Through Channels with Insert

1995 ◽  
Vol 60 (9) ◽  
pp. 1476-1491
Author(s):  
Václav Dolejš ◽  
Petr Doleček ◽  
Ivan Machač ◽  
Bedřich Šiška
Keyword(s):  
Reynolds Number ◽  
Pressure Drop ◽  
Laminar Flow ◽  
Numerical Solution ◽  
Newtonian Fluid ◽  
Calculation Method ◽  
Approximate Calculation ◽  
Creeping Flow ◽  
Experimental Results ◽  
Generalized Newtonian Fluid

An equation of Rabinowitsch-Mooney type has been suggested for approximate calculation of pressure drop in flow of generalized Newtonian fluid through channels with insert both in the region of creeping flow and at higher values of the Reynolds number, and this calculation method has been verified for four types of insert using own numerical solution and experimental results as well as literature data.

Analysis of Steady Laminar Flow of an Incompressible Newtonian Fluid Through Curved Pipes of Small Curvature

1973 ◽  
Vol 95 (1) ◽  
pp. 75-80 ◽  
Author(s):  
M. Sankaraiah ◽  
Y. V. N. Rao
Keyword(s):  
Pressure Drop ◽  
Laminar Flow ◽  
Secondary Flow ◽  
Newtonian Fluid ◽  
Axial Velocity ◽  
Axial Pressure ◽  
Small Curvature ◽  
Curved Pipes ◽  
Incompressible Newtonian Fluid ◽  
Steady Laminar

Steady laminar flow of an incompressible Newtonian fluid through a curved pipe of small curvature is considered. The governing equations of flow are obtained in terms of secondary flow stream function and axial velocity component as suggested by Dean. A method of successive approximations is developed to solve these equations. The first five approximations are computed. The solution obtained is used to determine the axial velocity distribution, secondary flow pattern, axial pressure drop, and pressure distribution along the pipe wall. A semiempirical equation is obtained for axial pressure drop. The theoretical results obtained are compared with the available experimental data on axial pressure drop.

Experimental Investigation of Pressure Distribution in Turbulent Flow Between Parallel and Inclined Disks

2015 ◽  
Vol 137 (11) ◽  
Author(s):  
Daniel A. Eisenberg ◽  
Cesar J. Deschamps
Keyword(s):  
Experimental Investigation ◽  
Turbulent Flow ◽  
Pressure Distribution ◽  
Radial Flow ◽  
Numerical Study ◽  
High Accuracy ◽  
Experimental Results ◽  
Turbulent Regime ◽  
Complex Flow ◽  
Simple Representation

Although the flow between parallel and inclined disks is a simple representation of many complex flow situations, this class of flow poses significant problems for experimental and numerical study. This paper presents experimental results of the pressure distribution for turbulent radial flow between parallel and inclined disks, considering different ratios between the diameters of the frontal disk and feeding orifice. The experimental results bolster the lack of data for both flow situations in the turbulent regime and demonstrate differences between them. The results presented have high accuracy and known uncertainty, making them useful for comparison to analytical and numerical results.

Messung der Druckerhöhung in einem Wasserstoff-Lichtbogen bei überlagertem axialem Magnetfeld

1966 ◽  
Vol 21 (4) ◽  
pp. 390-398 ◽  
Author(s):  
H. F. Döbele ◽  
R. Wienecke ◽  
S. Witkowski
Keyword(s):  
Magnetic Field ◽  
Pressure Distribution ◽  
Axial Magnetic Field ◽  
Arc Discharge ◽  
Radial Pressure ◽  
Experimental Results ◽  
Small Opening ◽  
Saha Equation ◽  
Cylindrically Symmetric ◽  
Inner Region

In a cylindrically symmetric hydrogen arc discharge located in an axial magnetic field, pressure is increased in the inner region, where ionization occurs. Measurements were made with initial pressures of 7.5 and 15 torr, with temperatures between 8000 and 12 000 °K, and with magnetic inductions of 8.5 and 12.5 kGauss. A mercury gauge was connected to a small opening in the anode to measure the radial pressure distribution in the plasma. Temperatures and electron densities were determined spectroscopically. The SAHA equation was found to be applicable in this case. Therefore, experimental results can be compared with theory based on the SAHA equation.

On the nominal transverse shear strain to characterize the severity of creasing

TAPPI Journal ◽  
2018 ◽  
Vol 17 (04) ◽  
pp. 231-240
Author(s):  
Douglas Coffin ◽  
Joel Panek
Keyword(s):  
Shear Strain ◽  
Transverse Shear ◽  
Elastic Limit ◽  
Experimental Results ◽  
Transverse Shear Strain ◽  
Maximum Strain ◽  
Machine Direction ◽  
Engineering Approach ◽  
Wide Range ◽  
Analytic Expression

A transverse shear strain was utilized to characterize the severity of creasing for a wide range of tooling configurations. An analytic expression of transverse shear strain, which accounts for tooling geometry, correlated well with relative crease strength and springback as determined from 90° fold tests. The experimental results show a minimum strain (elastic limit) that needs to be exceeded for the relative crease strength to be reduced. The theory predicts a maximum achievable transverse shear strain, which is further limited if the tooling clearance is negative. The elastic limit and maximum strain thus describe the range of interest for effective creasing. In this range, cross direction (CD)-creased samples were more sensitive to creasing than machine direction (MD)-creased samples, but the differences were reduced as the shear strain approached the maximum. The presented development provides the foundation for a quantitative engineering approach to creasing and folding operations.

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