Pressure recovery measurement in a supersonic ejector using a centerline pressure probe

2020 ◽  
Vol 48 (4) ◽  
pp. 339-349
Author(s):  
P. Desevaux ◽  
A. Bouhanguel ◽  
V. Lepiller ◽  
E. Gavignet
Keyword(s):  
Pressure Recovery ◽  
Pressure Probe ◽  
Supersonic Ejector

Flow Investigation Through a 30° Turn Diffusing Duct in Subsonic Flow Regime

2009 ◽  
Author(s):  
Prasanta K. Sinha ◽  
Biswajit Haldar ◽  
Amar N. Mullick ◽  
Bireswar Majumdar
Keyword(s):  
Axial Velocity ◽  
Pressure Loss ◽  
Total Pressure ◽  
High Speed ◽  
Static Pressure ◽  
Transverse Velocity ◽  
Total Pressure Loss ◽  
Pressure Recovery ◽  
Pressure Probe ◽  
Mean Velocity

Curved diffusers are an integral component of the gas turbine engines of high-speed aircraft. These facilitate effective operation of the combustor by reducing the total pressure loss. The performance characteristics of these diffusers depend on their geometry and the inlet conditions. In the present investigation the distribution of axial velocity, transverse velocity, mean velocity, static and total pressures are experimentally studied on a curved diffuser of 30° angle of turn with an area ratio of 1.27. The centreline length was chosen as three times of inlet diameter. The experimental results then were numerically validated with the help of Fluent, the commercial CFD software. The measurements of axial velocity, transverse velocity, mean velocity, static pressure and total pressure distribution were taken at Reynolds number 1.9 × 105 based on inlet diameter and mass average inlet velocity. The mean velocity and all the three components of mean velocity were measured with the help of a pre-calibrated five-hole pressure probe. The velocity distribution shows that the flow is symmetrical and uniform at the inlet and exit sections and high velocity cores are accumulated at the top concave surface due to the combined effect of velocity diffusion and centrifugal action. It also indicates the possible development of secondary motions between the concave and convex walls of the test diffuser. The mass average static pressure recovery and total pressure loss within the curved diffuser increases continuously from inlet to exit and they attained maximum values of 35% and 14% respectively. A comparison between the experimental and predicated results shows a good qualitative agreement between the two. Standard k-ε model in Fluent solver was chosen for validation. It has been observed that coefficient of pressure recovery Cpr for the computational investigation was obtained as 38% compared to the experimental investigation which was 35% and the coefficient of pressure loss is obtained as 13% in computation investigation compared to the 14% in experimental study, which indicates a very good qualitative matching.

CFD Design Study of a Pressure Probe for Centerline Static Pressure Measurement in Supersonic Ejectors

2019 ◽  
Vol 36 (1) ◽  
pp. 107-112 ◽  
Author(s):  
Ala Bouhanguel ◽  
Philippe Desevaux ◽  
Mohamed Khan
Keyword(s):  
Pressure Measurement ◽  
Test Bench ◽  
Static Pressure ◽  
Capillary Tube ◽  
Numerical Study ◽  
Pressure Probe ◽  
Design Study ◽  
Supersonic Ejector ◽  
Thin Tube ◽  
Flow Pressure

Abstract The measurement of the static pressure of the flow inside a supersonic ejector can be achieved by using a thin tube with a radially drilled hole to capture the flow pressure, and which is inserted along the ejector axis. This paper presents a numerical study by CFD permitting to predict the disturbances generated by the presence of the probe in the ejector. Also this study allows guiding the design of the probe, in particular of the capillary tube diameter for the least disturbed measurement. A probe prototype has been built and tested on an ejector test bench.

Maximizing pressure recovery using lobed nozzles in a supersonic ejector

2012 ◽  
Vol 37 ◽  
pp. 396-402 ◽  
Author(s):  
Matthew J. Opgenorth ◽  
Donn Sederstrom ◽  
William McDermott ◽  
Corinne S. Lengsfeld
Keyword(s):  
Pressure Recovery ◽  
Supersonic Ejector

Determination of cyclic flooding parameters for a group of wells based on analysis of pressure recovery curves

2020 ◽  
pp. 37-42
Author(s):  
Ju.V. Khalilova ◽  
◽  
V.V. Kozlov ◽  
L.N. Makarova ◽  
O.N. Kuzyakov ◽  
...  
Keyword(s):  
Pressure Recovery ◽  
Recovery Curves

A stagnation pressure probe for droplet-laden air flow

1985 ◽  
Author(s):  
S. MURTHY ◽  
M. LEONARDO ◽  
C. EHRESMAN
Keyword(s):  
Air Flow ◽  
Stagnation Pressure ◽  
Pressure Probe

EFFECT OF OPERATING TIME OF THE WELLS IN THE STEADY DRAINAGE MODE BEFORE STOPPING ON THE RESULTS OF THE STUDY OF PRESSURE BUILD-UP CURVES

2017 ◽  
pp. 48-50
Author(s):  
E. F. Gilfanov
Keyword(s):  
Operating Time ◽  
Previous History ◽  
Operation Time ◽  
Pressure Recovery ◽  
Recovery Curve ◽  
History Of ◽  
Accuracy Of Results ◽  
Theoretical Pressure

Operation time of the well before stopping for investigating the pressure recovery curve in hydrodynamic studies is an important parameter affecting the quality and accuracy of results of research processing. Comparing the actual and theoretical pressure curves and the derivative, it’s possible to eliminate the uncertainty in the choice of previous history of the well operation.

Karakteristik aliran dua fase pada saluran ekspansi tiba-tiba

2018 ◽  
Vol 11 (1) ◽  
pp. 7
Author(s):  
Latif Ngudi Wibawanto ◽  
Budi Santoso ◽  
Wibawa Endra Juwana
Keyword(s):  
Standard Deviation ◽  
Flow Pattern ◽  
Flow Characteristic ◽  
Homogeneous Model ◽  
Flow Equation ◽  
Pressure Recovery ◽  
Sudden Expansion ◽  
Air Velocity ◽  
Model Flow ◽  
Two Phases

This research was conducted to find out the flow characteristic of two phases through the channel with sudden expansion in the form of change of flow pattern and pressure recovery. The test was carried out with variation of superficial velocity of water 0.2-1.3 m / s and superficial air velocity of 0.2-1.9 m / s resulting in pattern of three flow patterns ie bubble, plug, and slug. The expansion channel resulted in some changes to the flow pattern that originally plugs in the upstream channel into bubble in the downstream channel and the slug becomes plug. Pressure recovery experimental results compared with the homogeneous model flow equation and Wadle correlation, both correlations have predictions with standard deviation values of 0.32 and 0.43.

Pressure Recovery in Bileaflet Heart Valve Prostheses

Circulation ◽  
1995 ◽  
Vol 92 (12) ◽  
pp. 3464-3472 ◽  
Author(s):  
Pieter M. Vandervoort ◽  
Neil L. Greenberg ◽  
Min Pu ◽  
Kimerly A. Powell ◽  
Delos M. Cosgrove ◽  
...  
Keyword(s):  
Heart Valve ◽  
Pressure Recovery ◽  
Heart Valve Prostheses ◽  
Valve Prostheses

scholarly journals “overestimation” of catheter gradients by doppler ultrasound in patients with aortic stenosis: a predictable manifestation of pressure recovery

1999 ◽  
Vol 33 (6) ◽  
pp. 1655-1661 ◽  
Author(s):  
Helmut Baumgartner ◽  
Thomas Stefenelli ◽  
Julia Niederberger ◽  
Heinrich Schima ◽  
Gerald Maurer
Keyword(s):  
Aortic Stenosis ◽  
Doppler Ultrasound ◽  
Pressure Recovery
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