Investigation of electrohydrodynamic jets beyond the outlet cross section of a source of charged particles

1972 ◽  
Vol 7 (1) ◽  
pp. 184-188
Author(s):  
V. I. Grabovskii
Keyword(s):  
Cross Section ◽  
Charged Particles ◽  
Outlet Cross Section

Energy distribution over the cross section of the track of charged particles having the same linear energy transfer

1973 ◽  
Vol 34 (4) ◽  
pp. 372-373
Author(s):  
I. K. Kalugina ◽  
I. B. Keirim-Markus ◽  
A. K. Savinskii ◽  
I. V. Filyushkin
Keyword(s):  
Energy Transfer ◽  
Energy Distribution ◽  
Cross Section ◽  
Linear Energy Transfer ◽  
Charged Particles ◽  
The Cross

Interactions of particles with matter

2020 ◽  
pp. 23-88
Author(s):  
Hermann Kolanoski ◽  
Norbert Wermes
Keyword(s):  
Energy Loss ◽  
Cross Section ◽  
Transition Radiation ◽  
Charged Particles ◽  
Theoretical Background ◽  
Coulomb Scattering ◽  
Interaction Processes ◽  
Multiple Coulomb Scattering

Particles are sensed through their interactions with matter. To begin with, the chapter introduces the terms cross section and absorption. Then successively the most important interactions that are employed for the detection of the various particle types are discussed: energy loss of charged particles by ionisation and bremsstrahlung, multiple Coulomb scattering of charged particles, interactions of photons and hadrons with matter. The interactions leading to the development of electromagnetic and hadronic showers are treated in more detail in chapter 15 (Calorimeters), while energy loss by Cherenkov and transition radiation are discussed in chapters 11 and 12, respectively. When describing the interaction processes an attempt is made to address the theoretical background in a way that the derivations ought to be comprehensible.

scholarly journals FLUID FLOW STUDY IN VARIOUS SHAPES AND SIZES OF HORIZONTAL AXIS SEA CURRENT TURBINE

SINERGI ◽  
2021 ◽  
Vol 25 (3) ◽  
pp. 289
Author(s):  
Wulfilla Maxmilian Rumaherang ◽  
Jonny Latuny
Keyword(s):  
Flow Velocity ◽  
Cross Section ◽  
Cross Sections ◽  
Discharge Coefficient ◽  
Flow Characteristics ◽  
Internal Flow ◽  
Flow Speed ◽  
Diameter Ratio ◽  
Power Coefficient ◽  
Outlet Cross Section

The ducted tidal turbine models have been developed to utilize the conversion of the kinetic energy on ocean currents. The research in refining the turbine characteristics has been carried out by modifying the turbine’s shape and size. This study investigated flow characteristics in the meridional section of five ducted turbines models for seawater flow with velocity U0 = 1.5 m/s. The ducted turbine design and construction have five different impeller house diameters and fixed inlet and outlet diameters. The potential energy flow theory and experimental data are used to analyze the flow characteristics of the model. The results show that flow velocity in the x-direction at the inlet and outlet cross-section is getting smaller, reducing the impeller house cross section. Each impeller house size reduction increases the flow speed in the impeller house cross-section and also pressure on all other cross-sections tested. In the inlet area, the increased pressure indicates a decrease in speed flow and discharge coefficient value. The discharge coefficient value decreases from CQ = 0.9 at the diameter ratio of dr = 1 to CQ = 0.56 at the diameter ratio of dr = 0.375. The maximum value of power coefficient was determined at dr = 0,61÷0.73 or dr = 0.69 which is equivalent to average internal flow velocity Vr =2.0÷2.6 m/s and the static pressure ps = 97.1÷ 94.4 kPa. At the ratio value of D0/D2 = 0.83, the optimal diameter ratio dropt=0,61÷0.73 is in line with the duct model of case 3 and case 4, but it may be determined solely as for case 4.

Development of a CFD-Based Coal Pipe Design Tool

2005 ◽  
Author(s):  
Gengxun Huang ◽  
Kenneth M. Bryden
Keyword(s):  
Power Plant ◽  
Cross Section ◽  
Small Region ◽  
Design Tool ◽  
Plant Performance ◽  
Design Stage ◽  
Radius Of Curvature ◽  
Outlet Cross Section ◽  
Curved Pipe ◽  
Pipe Cross Section

In a coal-fired power plant, pulverized coal, using air as a transport medium, is pneumatically transported toward different burner nozzles by splitting the large pipe into small pipes through bifurcators or trifurcators. The combustion efficiency of the burner is dependent on matching the air and coal in these pipes. Increasingly tight emission standards also make the balance of air and coal a very critical factor for the success of the power plant. Coal roping occurs when the gas-solid flow passes through a curved pipe. The momentum of the particles carries them to the outside of the wall, concentrating in a small region. Therefore, the particle concentration in this small region is much higher than the other part of the pipe cross-section. Coal roping upstream of a coal distributor (bifurcator) can create a significant imbalance in coal loading in the split between the two branches. This can significantly impact plant performance and increase NOx production. Previous research [2] has shown that coal rope characteristics depend on many parameters; the geometry (i.e., elbow radius of curvature-to-pipe diameter ratio, pipe orientation, orifice opening, and the locations of orifices) of the coal pipe, which is determined at the design stage, will strongly affect the coal distribution in the outlet of coal pipes. This characteristic of coal roping indicates that optimizing the pipe geometry may be helpful in getting a more uniform coal distribution at the pipe’s outlet cross-section and minimizing the problems caused by imbalance between burners. In this paper, we present the CFD-based coal pipeline design tool to achieve the evenly distributed coal particle distribution across the pipe cross-section.

CFD modeling of slurry flow erosion wear rate through mitre pipe bend

2022 ◽  
pp. 095440622110263
Author(s):  
Om Parkash ◽  
Arvind kumar ◽  
Basant Singh Sikarwar
Keyword(s):  
Wear Rate ◽  
Cross Section ◽  
Erosive Wear ◽  
Cfd Modeling ◽  
Phase Method ◽  
Solid Concentration ◽  
Erosion Wear ◽  
Pipe Bend ◽  
Outlet Cross Section ◽  
Wide Range

Erosive wear caused by particulates slurry is one of the major concerns in the pipe bend which may results in the failure of the pipe flow system. In the present work, erosion wear rate through mitre pipe bend caused by silica sand particulates slurry has been investigated using ANSYS Fluent code. The solid spherical particulates of size 125 µm and 250 µm having density of 2650 Kg/m3, were tracked to compute the erosion wear rate using Discrete Phase Method (DPM) model. The particulates were tracked using Eulerian-Lagrange approach along with k-ɛ turbulent model for continuous fluid phase. The silica particulates were injected at solid concentration of 5% and 10% (by weight) from the pipe inlet surface for wide range of velocities viz. 1–8 ms−1. The erosion wear rate was computed through four computational erosion models viz. Generic, Oka, Finnie and Mclaury. Furthermore, the outcomes obtained through Generic models are verified through existing experimental data in the literture. Moreover, the results of DPM concentration, turbulence intensity and particle tracking were predicted to analyze the secondary flow behaviour through the bend cross section. Finally, the effect of particulate size, solid concentration and flow velocity were discussed on erosion wear rate through bend cross section. The findings show that the locality of maximum erosive wear is positioned at the extrados of the bend outlet cross section. Additionally, it is found that Mclaury model offers higher erosion rate as compared to the other models and provides benchmark for designing the slurry pipeline system.

Scattering of Non-Relativistic Charged Particles by Electromagnetic Radiation

2017 ◽  
Vol 72 (12) ◽  
pp. 1173-1177
Author(s):  
M. Apostol
Keyword(s):  
Electromagnetic Radiation ◽  
Cross Section ◽  
Charged Particles ◽  
Momentum Conservation ◽  
Potential Scattering ◽  
Photon Absorption ◽  
Focal Region ◽  
Electrons And Ions ◽  
The Cross ◽  
Energy And Momentum

AbstractThe cross-section is computed for non-relativistic charged particles (like electrons and ions) scattered by electromagnetic radiation confined to a finite region (like the focal region of optical laser beams). The cross-section exhibits maxima at scattering angles given by the energy and momentum conservation in multi-photon absorption or emission processes. For convenience, a potential scattering is included and a comparison is made with the well-known Kroll-Watson scattering formula. The scattering process addressed in this paper is distinct from the process dealt with in previous studies, where the scattering is immersed in the radiation field.

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