High Speed Flow through Perforated Plates

1960 ◽  
Vol 64 (590) ◽  
pp. 103-105
Author(s):  
P. G. Morgan
Keyword(s):  
Pressure Drop ◽  
High Speed ◽  
Perforated Plate ◽  
Wire Mesh ◽  
Flow Conditions ◽  
High Speed Flow ◽  
Perforated Plates ◽  
Speed Flow ◽  
Flow Through ◽  
Points Of View

The flow through porous screens has been widely studied from both the theoretical and experimental points of view. The most widely used types of screen are the wire mesh and the perforated plate, and the majority of the literature has been concerned with the former. Several attempts have been made to correlate the parameters governing the flow through such screens, i.e. the pressure drop, the flow conditions and the geometry of the mesh.

High Speed Flow Through Wire Gauzes

1959 ◽  
Vol 63 (584) ◽  
pp. 474-475 ◽  
Author(s):  
P. G. Morgan
Keyword(s):  
Pressure Drop ◽  
Pressure Loss ◽  
High Speed ◽  
Static Pressure ◽  
Flow Conditions ◽  
High Speed Flow ◽  
Speed Flow ◽  
Wire Gauze ◽  
Flow Through

The Flow of Fluids through screens has been widely studied with particular importance being attached to the measurement of the pressure drop caused by a screen and its relation to the screen geometry and the flow conditions. The majority of the investigations have been carried out on wire gauze screens mounted in ducts with air passing through them, the static pressure being measured on either side of the gauze. Attempts have been made by Weighardt Annand and Grootenhuisto correlate the gauze geometry with the pressure drop and to enable the pressure loss over a given screen and with given flow conditions to be predicted.

High-Speed Aerosol Flow Through Micro-Nozzles for Direct-Write Processes

2013 ◽  
Author(s):  
Justin M. Hoey ◽  
Sourin Bhattacharya ◽  
Artur Lutfurakhmanov ◽  
Michael Robinson ◽  
Orven F. Swenson ◽  
...  
Keyword(s):  
High Speed ◽  
Aerosol Particles ◽  
Particle Interaction ◽  
Direct Write ◽  
Particle Rotation ◽  
High Speed Flow ◽  
Magnus Force ◽  
Aerosol Flow ◽  
Speed Flow ◽  
Flow Through

Aerosol direct-write printing for mesoscale features has been commercially available since around 2002 from Optomec®. We have developed variances to this process first in Collimated Aerosol Beam-Direct Write (CAB-DW) for printing sub-10 μm features and in Micro Cold Spray for printing with solid metallic aerosols. These deposition tools offer extensive uses, but are still limited in certain applications by either line widths or the amount of overspray. Modeling of aerosol flow through micro-nozzles used in these applications yields a greater understanding of the focusing of these aerosol particles, and may provide a vehicle for new nozzle designs which will further enhance these tools. Recent modeling applied both Stokes and Saffman force to the aerosol particles. Under certain conditions particle rotation and Magnus force may also be necessary to accurately predict the aerosol particles. In this paper we will present our recent results of high-speed flow of 1–10 μm diameter aerosol particles through micro-nozzles in which the model includes all three forces (Stokes, Saffman, Magnus) of fluid-particle interaction, and a comparison of these results to experiments.

scholarly journals Numerical Prediction of Homogeneity of Gas Flow through Perforated Plates

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1770
Author(s):  
Kamil Śmierciew ◽  
Dariusz Butrymowicz ◽  
Jarosław Karwacki ◽  
Jerzy Gagan
Keyword(s):  
Pressure Drop ◽  
Gas Flow ◽  
Numerical Models ◽  
Perforated Plate ◽  
Total Surface Area ◽  
Structural Elements ◽  
Open Area ◽  
Perforated Plates ◽  
Porous Media Model ◽  
Flow Through

Vanes and baffles are often used as flow distributors where uniform flow is required in the apparatus of large cross-section surface areas. As an alternative, perforated plates with a range of open area ratios are applied to produce required gas flow homogeneity. Usually, the plates with various open area ratios are combined into large panels, of which total surface area can reach hundreds of square meters for large-sized industrial apparatus. Numerical modelling of the flow through such panels can be thought of as overly complex, time-consuming, and inefficient due to numerous small open area ratios in the plates and large differences in dimensions between open area ratios and free-stream areas. For this reason, numerical models of gas flow are limited to single plates only with constant open area ratios. A new indirect modelling approach of gas flow through the perforated plates panel with structural elements and various open area ratios with application of the porous media model is proposed. A perforated plate was experimentally investigated in terms of pressure drop and velocity distribution. The data obtained were used for the validation of the numerical results, which differed from the experimental results by less than 5%. In the next step, numerical analyses were performed for plates with open area ratios in the range of 30 to 70% for gas velocities of 5 and 10 m/s. A general correlation for pressure drop as a function of open area ratio was proposed. Finally, systematic numerical studies of the flow through both perforated and porous plates including structural elements were performed. The internal resistance of the porous core was calculated by means of a developed correlation. A good agreement between results with an error lower than 15% was observed.

Aerothermal/Ablation Analysis of a Projectile in High Speed Flow Conditions

2005 ◽  
Author(s):  
Christian Ruel ◽  
Nicolas Hamel ◽  
Francois Lesage
Keyword(s):  
High Speed ◽  
Flow Conditions ◽  
High Speed Flow ◽  
Speed Flow

Quantitative Visualization of High Speed Flow through Optical Tomography

2012 ◽  
pp. 653-658 ◽  
Author(s):  
Biswajit Medhi ◽  
G. M. Hegde ◽  
K. P. J. Reddy ◽  
D. Roy ◽  
R. M. Vasu
Keyword(s):  
High Speed ◽  
Optical Tomography ◽  
High Speed Flow ◽  
Speed Flow ◽  
Quantitative Visualization ◽  
Flow Through

scholarly journals Aerospace Flight Modeling and Experimental Testing

2021 ◽  
pp. 131-147
Author(s):  
Olivier Chazot
Keyword(s):  
Wind Tunnel ◽  
Uncertainty Quantification ◽  
High Speed ◽  
Experimental Approach ◽  
Experimental Testing ◽  
Flow Conditions ◽  
High Speed Flow ◽  
Flow Physics ◽  
Speed Flow ◽  
Hypersonic Wind Tunnel

AbstractValidation processes for aerospace flight modeling require to articulate uncertainty quantification methods with the experimental approach. On this note, the specific strategies for the reproduction of re-entry flow conditions in ground-based facilities are reviewed. It shows how it combines high-speed flow physics with the hypersonic wind tunnel capabilities.

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