Analysis of a new type of high pressure homogeniser. Part B. study of droplet break-up and recoalescence phenomena

2004 ◽  
Vol 59 (6) ◽  
pp. 1285-1294 ◽  
Author(s):  
Juliane Floury ◽  
Jack Legrand ◽  
Anne Desrumaux
Keyword(s):  
High Pressure ◽  
New Type ◽  
Break Up

Method to reduce the oil pressure during HPHT diamond synthesis: FEM simulations and experiments

CrystEngComm ◽  
2020 ◽  
Vol 22 (44) ◽  
pp. 7601-7606
Author(s):  
Chunxiao Wang ◽  
Hong-an Ma ◽  
Liangchao Chen ◽  
Xinyuan Miao ◽  
Liang Zhao ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Cell Assembly ◽  
Diamond Synthesis ◽  
Fem Simulations ◽  
High Pressure High Temperature ◽  
New Type

Here, a new type of supercharged cell assembly is proposed that can effectively reduce the oil pressure during high-pressure, high-temperature (HPHT) diamond synthesis.

CAD AND CAE TECHNOLOGIES OF A NOVEL PLANE SIX-BAR SWAYING MACHINE

2008 ◽  
Vol 07 (01) ◽  
pp. 65-67
Author(s):  
CHANGPING ZOU ◽  
LI DU ◽  
XIANDE HUANG
Keyword(s):  
High Pressure ◽  
Kinetic Analysis ◽  
Rotational Speed ◽  
Preliminary Analysis ◽  
Unit Weight ◽  
The Novel ◽  
Parameterized Modeling ◽  
New Type ◽  
Working Principle ◽  
Key Dimensions

A new type of six-bar swaying machine was put forward, which is an ingenious combination of plane multi-bar mechanism and high pressure oil cylinder. Preliminary analysis shows that this machine has many advantages, such as the torque produced by its unit weight, its small size, its light deadweight, etc. Thus it can be applied to situations that need swaying mechanism with low rotational speed and great torque. Firstly, the mechanism composition and working principle of the swaying machine were introduced. Secondly, parameterized modeling of the mechanism was carried out by utilizing software ADAMS. Then kinematic analysis and kinetic analysis were completed by using ADAMS. Finally, key dimensions were adjusted according to kinetic analysis. These tasks are believed to be beneficial to the development of the novel transmission.

Modeling droplet break-up effects for high pressure cryogenic spray combustion codes

2000 ◽  
Author(s):  
I. Gokalp ◽  
E. Bodele ◽  
R. Cousty ◽  
B. Vieille ◽  
E. Fedioun ◽  
...  
Keyword(s):  
High Pressure ◽  
Spray Combustion ◽  
Break Up

Bending and break-up of a liquid jet in a high pressure airflow

2003 ◽  
Vol 27 (4) ◽  
pp. 449-454 ◽  
Author(s):  
A. Cavaliere ◽  
R. Ragucci ◽  
C. Noviello
Keyword(s):  
High Pressure ◽  
Liquid Jet ◽  
Break Up

Numerical Modelling of Droplet Deformation in a High-Pressure Homogeniser

2002 ◽  
Author(s):  
David S. Whyte ◽  
Steven Carnie ◽  
Malcolm Davidson
Keyword(s):  
High Pressure ◽  
Numerical Modelling ◽  
Numerical Study ◽  
Extensional Flow ◽  
Operating Conditions ◽  
Droplet Deformation ◽  
Photographic Paper ◽  
Turbulent Fluctuations ◽  
Fluid Properties ◽  
Break Up

A numerical study of droplet deformation in a high-pressure homogeniser is presented. This work is an attempt to identify flow criteria responsible for droplet break-up in a homogeniser used to produce dispersions for the manufacture of photographic paper. The main goal of this study is to recommend changes to homogeniser flow & geometry, operating conditions or fluid properties that will enhance droplet break-up. Laminar elongation, turbulent stresses within the orifice and downstream turbulence and cavitation have been suggested as possible mechanisms within the homogeniser for droplet rupture. Results for simulations, using a combination of homogeniser and droplet scale computation indicate that droplets are unaffected by local extensional flow or turbulent fluctuations and that other mechanisms must be responsible for droplet break-up.

Design of New-Type Vertical Dredging Equipment for Coal Bunker

2011 ◽  
Vol 228-229 ◽  
pp. 568-573
Author(s):  
Jian Xin Zheng ◽  
Chuan Shao Liu ◽  
Yue Hong Tian
Keyword(s):  
High Pressure ◽  
High Speed ◽  
New Type ◽  
Dynamic High Pressure

A new-type of dredging equipment for the coal bunker is designed to solve the clogging problem, which avoids the disadvantages of the existing dredging technology used in the collieries. The new dredging method borrows ideas from air cannon dredging technology, and applies dynamic high pressure generation principle. In the process of dredging, the rubber bullet in the launch canister is accelerated by the controlled high pressure air, and impacts the coal in the arch with high speed so as to recover the coal bunker. The dredging mechanism and process are expatiated and the main structures of the dredging equipment are introduced. The structure of the new type dredging equipment for the coal bunker is simple and the equipment is of high adaptability and safety.

The Stress Analysis of New Pressure Piping Model

2011 ◽  
Vol 474-476 ◽  
pp. 1215-1220
Author(s):  
Bin Wang ◽  
Cai Liu ◽  
Xue Li Wu ◽  
Xue Fei Qiao
Keyword(s):  
High Pressure ◽  
Load Capacity ◽  
Compressive Load ◽  
Theoretical Formula ◽  
Pressure Pipe ◽  
Unit Design ◽  
Pressure Pipeline ◽  
New Type ◽  
Pressure Unit ◽  
Development Tendency

High-pressure becomes the high pressure unit design main consideration factor to compressive load capacity, security, efficiency, economic and manufacturing process of high-pressure equipment. This article proposes a new pressure piping according to the current high-voltage device development tendency and the future requirement. This new type of pressure pipe can be simplified for pipe casing model. Firstly we establish single, double and multilayer pressure piping model. We push out the multilayer pressure pipe stress formula according to stress situation of the analysis of the knowledge of mechanics of each model. We get this pressure piping withstand by the most intrinsic pressure enhance obviously under each layer within the radius of the cylinder reach the initial limitation of materials and other parameters of model are same through the comparison of the theoretical formula calculation with other general. Pressure pipeline calculated value. The multi-layer pressure piping system's circum radius are smaller than other piping with other pressure piping withstand the same most intrinsic pressure and the most interior radius are the same situation.

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