An Experimental Investigation of Laminar Hypersonic Cavity Flows. Part 1. Pressure Measurements

1962 ◽  
Author(s):  
K. M. Nicoll
Keyword(s):  
Experimental Investigation ◽  
Cavity Flows ◽  
Pressure Measurements

Experimental Investigation of Aspect-Ratio Effects in Transonic Rectangular Cavity Flows

2014 ◽  
Author(s):  
Justin L. Wagner ◽  
Steven J. Beresh ◽  
Katya M. Casper ◽  
Brian Pruett ◽  
Russell Spillers ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Aspect Ratio ◽  
Rectangular Cavity ◽  
Cavity Flows

An Investigation of Nucleating Flows of Steam in a Cascade of Turbine Blading

1993 ◽  
Vol 115 (1) ◽  
pp. 128-134 ◽  
Author(s):  
F. Bakhtar ◽  
R. A. Webb ◽  
M. H. Shojaee-Fard ◽  
M. A. Siraj
Keyword(s):  
Experimental Investigation ◽  
Surface Pressure ◽  
Reasonable Agreement ◽  
Experimental Results ◽  
Pressure Measurements ◽  
Experimental Facility ◽  
Blow Down ◽  
Turbine Blading

During the course of expansion in turbines steam first supercools and then nucleates to become a wet mixture. To reproduce turbine nucleating conditions realistically requires a supply of supercooled vapor. This can be achieved under blow-down conditions and an experimental facility for such studies has been constructed. The results of the first experimental investigation of nucleating flows of steam in a cascade of nozzle blading using the equipment are presented. The experimental results presented consist of surface pressure measurements, Mach-Zehnder and shadow photography. Comparisons with theoretical solutions show reasonable agreement.

On the Hydrodynamic of an Impinging Swirling Jet: Effect of the Impingement Distance and the Swirl Number

2009 ◽  
Author(s):  
Mario Felli
Keyword(s):  
Experimental Investigation ◽  
Wall Pressure ◽  
Pressure Measurements ◽  
Swirl Number ◽  
Swirling Jet ◽  
Wall Interaction

The present paper deals with the problem of an impinging swirling jet against a wall. The study concerned a detailed experimental investigation on the jet-wall interaction using velocity and wall pressure measurements in the Large Cavitation Channel of INSEAN. The influence of the impingement distance and the swirl number as well as the interaction between the jet deformation and the perturbation induced on the wall are highlighted in the paper.

Dynamic Film Pressure Measurements in Journal Bearings for Use in Rotor Balancing

1976 ◽  
Vol 98 (1) ◽  
pp. 92-100 ◽  
Author(s):  
E. Christensen ◽  
J. Tonnesen ◽  
J. W. Lund
Keyword(s):  
Experimental Investigation ◽  
Measurement Accuracy ◽  
Journal Bearing ◽  
Linear Analysis ◽  
Journal Bearings ◽  
Experimental Measurements ◽  
Pressure Measurements ◽  
Pressure Transducers ◽  
Theoretical Predictions ◽  
Rotor Balancing

The paper presents the results of an experimental investigation where membrane transducers in the journal bearing wall are used to measure the dynamic oil-film pressures caused by rotor unbalance whirl. The results are applied successfully to balancing the rotor, and the experimental measurements of amplitude and pressure response are found to agree well with theoretical predictions, based on a linear analysis. The measurement accuracy of the pressure transducers compare favorably with the accuracy obtained with shaft displacement probes.

Characterising low-speed, transitional cavity flow

2012 ◽  
Vol 116 (1185) ◽  
pp. 1185-1199 ◽  
Author(s):  
Y. T. Ng
Keyword(s):  
Pressure Distribution ◽  
Static Pressure ◽  
Fluid Dynamic ◽  
Flow Regimes ◽  
Cavity Flow ◽  
Flow Visualisation ◽  
Cavity Flows ◽  
Pressure Measurements ◽  
Closed Cavity ◽  
Fluctuating Pressure

In various studies involving subsonic transition cavity flows, terms like ‘transitional-open’ and ‘transitional-closed’ cavity flow regimes are used in the literature. However, the exact fluid dynamic criteria to distinguish them have not been firmly established. The present work attempts to clarify this. Experiments to measure static pressure and fluctuating pressure distribution in a rectangular cavity with length-to-depth (L/D) ratio of 3 to 20 were performed. Based on pressure measurements on the front, bottom and rear faces of the cavity, additional criteria are established to clearly distinguish the range of criticalL/D(or (L/D)cri) where these different transitional cavity flow regimes occur. The present work ascertains that the (L/D)crifor open and transitional-open cavity flow is 6·0-6·5, for transitional-open and transitional-closed cavity flow is 9-10 and for transitional-closed and closed cavity flow is 14-15. Flow visualisation qualitatively supports the flow pattern in the different cavity flow regimes.

Pressure Measurements on Flapped Hydrofoils in Cavity Flows and Wake Flows

1967 ◽  
Vol 11 (03) ◽  
pp. 170-189
Author(s):  
M. C. Meijer
Keyword(s):  
Wall Effect ◽  
Cavity Flows ◽  
Pressure Measurements ◽  
Viscous Effect ◽  
Tunnel Wall ◽  
Experimental Procedure ◽  
Wake Flows ◽  
Theoretical Predictions ◽  
Theory And Experiments ◽  
Good Agreement

The purpose of the present experiments is to obtain detailed information about the flow field, such as the pressure distribution, at the surface of a flapped hydrofoil in full cavity or wake flows. The model and the experimental procedure are described. The experimental results obtained have been used to compare with the theoretical predictions, to investigate the tunnel wall effect and to estimate the viscous effect at a sharp corner. Anempirical method for correcting the tunnel wall effect is developed here, the validity of which is supported by tests with models of three different sizes. An appreciable Viscous effect has been found near the hinge of a deflected flap. Except for this effect, the theory and experiments are found to be in good agreement.

Experimental investigation of supersonic internal cavity flows

1995 ◽  
Author(s):  
Kazuyuki Sakamoto ◽  
Koji Matsunaga ◽  
Kozo Fujii ◽  
Yoshiaki Tamura
Keyword(s):  
Experimental Investigation ◽  
Internal Cavity ◽  
Cavity Flows
Sign in / Sign up

Export Citation Format

Share Document