scholarly journals Reconstructing the time evolution of wall-bounded turbulent flows from non-time-resolved PIV measurements

2020 ◽  
Vol 5 (5) ◽  
Author(s):  
C. Vamsi Krishna ◽  
Mengying Wang ◽  
Maziar S. Hemati ◽  
Mitul Luhar
Keyword(s):  
Time Evolution ◽  
Turbulent Flows ◽  
Time Resolved ◽  
Piv Measurements

Time-resolved PIV measurements of the flow field in a stenosed, compliant arterial model

2013 ◽  
Vol 54 (5) ◽  
Author(s):  
P. H. Geoghegan ◽  
N. A. Buchmann ◽  
J. Soria ◽  
M. C. Jermy
Keyword(s):  
Flow Field ◽  
Time Resolved ◽  
Piv Measurements ◽  
Arterial Model

scholarly journals PIV measurements of turbulent flows in a 61-pin wire-wrapped hexagonal fuel bundle

2017 ◽  
Vol 65 ◽  
pp. 47-59 ◽  
Author(s):  
Thien Nguyen ◽  
Nolan Goth ◽  
Philip Jones ◽  
Saya Lee ◽  
Rodolfo Vaghetto ◽  
...  
Keyword(s):  
Turbulent Flows ◽  
Piv Measurements ◽  
Fuel Bundle

Time-Resolved Particle Image Velocimetry (PIV) Measurements in a Radial Diffuser Pump

2009 ◽  
Author(s):  
Jianjun Feng ◽  
Friedrich-Karl Benra ◽  
Hans Josef Dohmen
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Time Resolved ◽  
Piv Measurements ◽  
Part Load ◽  
Channel Characteristic ◽  
Image Velocimetry ◽  
Pump Stage ◽  
Low Specific Speed ◽  
Load Conditions

The truly time-variant unsteady flow in a low specific speed radial diffuser pump stage has been investigated by time-resolved Particle Image Velocimetry (PIV) measurements. The measurements are conducted at the midspan of the blades for the design condition and also for some severe part-load conditions. The instantaneous flow fields among different impeller channels are analyzed and compared in detail, and more attention has been paid to flow separations at part-load conditions. The analysis of the measured results shows that the flow separations at two adjacent impeller channels are quite different at some part-load conditions. The separations generally exhibit a two-channel characteristic.

Time-resolved PIV measurements of a tip leakage flow

2016 ◽  
Vol 15 (6-7) ◽  
pp. 662-685 ◽  
Author(s):  
Marc C Jacob ◽  
Emmanuel Jondeau ◽  
Bo Li
Keyword(s):  
Leakage Flow ◽  
Tip Leakage Flow ◽  
Time Resolved ◽  
Piv Measurements ◽  
Tip Leakage

scholarly journals Analysis of ECN spray A ignition in a Rapid Compression Machine using simultaneous OH* chemiluminescence and formaldehyde PLIF

2020 ◽  
Vol 75 ◽  
pp. 38 ◽  
Author(s):  
Camille Strozzi ◽  
Moez Ben Houidi ◽  
Julien Sotton ◽  
Marc Bellenoue
Keyword(s):  
High Temperature ◽  
Time Evolution ◽  
High Speed ◽  
Numerical Models ◽  
Phase Region ◽  
Diesel Spray ◽  
Rapid Compression Machine ◽  
Time Resolved ◽  
Cool Flame ◽  
Rapid Compression

The canonical diesel spray A is characterized in an optical Rapid Compression Machine (RCM) at high temperature and density conditions (900 K and 850 K, ρ = 23 kg/m3) using simultaneous high-speed OH* chemiluminescence and two-pulse 355 nm Planar Laser Induced Fluorescence (PLIF). The focus is on the time evolution and the repeatability of the early stages of both cool flame and hot ignition phenomena, and on the time evolution of the fluorescing formaldehyde region in between. In particular, time resolved data related to the cool flame are provided. They show the development of several separated kernels on the spray sides at the onset of formaldehyde appearance. Shortly after this phase, the cool flame region expands at high velocity around the kernels and further downstream towards the richer region at the spray head, reaching finally most of the vapor phase region. The position of the first high temperature kernels and their growth are then characterized, with emphasis on the statistics of their location. These time-resolved data are new and they provide further insights into the dynamics of the spray A ignition. They bring some elements on the underlying mechanisms, which will be useful for the validation and improvement of numerical models devoted to diesel spray ignition.

Tomographic and time resolved PIV measurements on a finite cylinder mounted on a flat plate

2008 ◽  
Vol 45 (4) ◽  
pp. 715-724 ◽  
Author(s):  
Rainer Hain ◽  
Christian J. Kähler ◽  
Dirk Michaelis
Keyword(s):  
Flat Plate ◽  
Finite Cylinder ◽  
Time Resolved ◽  
Piv Measurements
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