scholarly journals Extended Calibration Technique of a Four-Hole Probe for Three-Dimensional Flow Measurements

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Suresh Munivenkatareddy ◽  
Nekkanti Sitaram
Keyword(s):  
Three Dimensional ◽  
Lower Sensitivity ◽  
Angular Range ◽  
Calibration Technique ◽  
Zonal Method ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Reduction Program ◽  
Left And Right ◽  
Calibration Coefficients

The present paper reports the development and nonnulling calibration technique to calibrate a cantilever type cylindrical four-hole probe of 2.54 mm diameter to measure three-dimensional flows. The probe is calibrated at a probe Reynolds number of 9525. The probe operative angular range is extended using a zonal method by dividing into three zones, namely, center, left, and right zone. Different calibration coefficients are defined for each zone. The attainable angular range achieved using the zonal method is ±60 degrees in the yaw plane and −50 to +30 degrees in the pitch plane. Sensitivity analysis of all the four calibration coefficients shows that probe pitch sensitivity is lower than the yaw sensitivity in the center zone, and extended left and right zones have lower sensitivity than the center zone. In addition, errors due to the data reduction program for the probe are presented. The errors are found to be reasonably small in all the three zones. However, the errors in the extended left and right zones have slightly larger magnitudes compared to those in the center zone.

Three-dimensional flow measurements in a static mixer

AIChE Journal ◽  
2012 ◽  
Vol 59 (5) ◽  
pp. 1746-1761 ◽  
Author(s):  
R. T. M. Jilisen ◽  
P. R. Bloemen ◽  
M. F. M. Speetjens
Keyword(s):  
Three Dimensional ◽  
Static Mixer ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Dimensional Flow

A Horseshoe Vortex in a Duct

1984 ◽  
Vol 106 (3) ◽  
pp. 668-676 ◽  
Author(s):  
J. Moore ◽  
T. J. Forlini
Keyword(s):  
Vortex Flow ◽  
Three Dimensional ◽  
Leading Edge ◽  
Horseshoe Vortex ◽  
The Body ◽  
Test Case ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Dimensional Flow ◽  
Side Walls

A Rankine half-body is used to model the three-dimensional flow caused by a blunt obstruction in a flow passage. The body is located in a duct bounded by two plane endwalls and two side walls shaped like potential-flow streamlines. A thick turbulent boundary layer on the endwall forms a horseshoe vortex flow as it encounters the leading edge of the body. Flow measurements are presented showing the inlet flow and the three-dimensional flow downstream of the leading edge. Sufficient data are presented for this to be a test case for the development of three-dimensional viscous flow codes.

Detailed Flow Measurements and Predictions for a Three-Stage Transonic Fan

1994 ◽  
Vol 116 (2) ◽  
pp. 298-305 ◽  
Author(s):  
W. J. Calvert ◽  
A. W. Stapleton
Keyword(s):  
Shock Waves ◽  
Computational Efficiency ◽  
Three Dimensional ◽  
Internal Flow ◽  
Design Tool ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Overall Performance ◽  
Calculation System ◽  
Transonic Fan

Detailed flow measurements were taken at DRA Pyestock on a Rolls-Royce three-stage transonic research fan using advanced laser transit velocimetry and holography techniques to supplement the fixed pressure and temperature instrumentation. The results have been compared with predictions using the DRA S1-S2 quasi-three-dimensional flow calculation system at a range of speeds. The agreement was generally encouraging, both for the overall performance and for details of the internal flow such as positions of shock waves. Taken together with the computational efficiency of the calculations and previous experience on single-stage transonic fans and core compressors, this establishes the S1-S2 system as a viable design tool for future multistage transonic fans.

The Development of Wake Flow in a Centrifugal Impeller

1980 ◽  
Vol 102 (2) ◽  
pp. 382-389 ◽  
Author(s):  
M. W. Johnson ◽  
J. Moore
Keyword(s):  
Three Dimensional ◽  
Suction Side ◽  
Secondary Flows ◽  
Wake Flow ◽  
Centrifugal Impeller ◽  
Three Dimensional Flow ◽  
Cross Sectional ◽  
Flow Measurements ◽  
Compressor Impeller ◽  
Rotating Impeller

Three-dimensional flow, leading to the formation and the growth of a wake in a centrifugal impeller, has been studied. Results of flow measurements in a 1 m dia, shrouded, centrifugal compressor impeller running at 500 rpm are presented. Relative velocities and rotary stagnation pressures (p* = p + 1/2ρW2 − 1/2ρω2r2) were measured, on five cross-sectional planes between the inlet and outlet of the impeller, using pressure probes which were traversed within the rotating impeller passage. Particular attention was given to the convection of low p* fluid by secondary flows and to the formation of the wake in the shroud/suction-side corner region of the passage.

Three-dimensional flow measurements in rock fractures

1999 ◽  
Vol 35 (12) ◽  
pp. 3955-3959 ◽  
Author(s):  
Peter E. Dijk ◽  
Brian Berkowitz
Keyword(s):  
Three Dimensional ◽  
Rock Fractures ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Dimensional Flow

scholarly journals On the use of a cascaded convolutional neural network for three-dimensional flow measurements using astigmatic PTV

2020 ◽  
Vol 31 (7) ◽  
pp. 074015
Author(s):  
Jörg König ◽  
Minqian Chen ◽  
Wiebke Rösing ◽  
David Boho ◽  
Patrick Mäder ◽  
...  
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Three Dimensional ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Dimensional Flow

A new probe for three‐dimensional flow measurements

1980 ◽  
Vol 51 (7) ◽  
pp. 989-991 ◽  
Author(s):  
S. Soundranayagam ◽  
V. Ramarajan
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Dimensional Flow
Sign in / Sign up

Export Citation Format

Share Document