Results 21 to 30 of about 3,932,847 (285)
Detection of Gas-Solid Two-Phase Flow Based on CFD and Capacitance Method
Applied Sciences, 2018 Multiphase flow in annular channels is complex, particularly in the region where the flow direction abruptly changes between the inner pipe and the outer pipe, as the cases in horizontal drilling and pneumatic conveying.
Wanting Zhou +5 more
doaj +1 more source
Improvement of the well cementing technology, increasing the reliability of the annule isolation and preserving the permeability of the reservoir [PDF]
E3S Web of Conferences, 2023 The article presents measures to improve the quality of cementing the production string of high-performance wells. The relevance of the proposed technological solutions is substantiated.
Hadid Mahmoud +4 more
doaj +1 more source
Parameter Analysis and Optimization of Annular Jet Pump Based on Kriging Model
Applied Sciences, 2020 Jet pump efficiency heavily relies on the geometrical parameters of the pump design and parameter global optimization in the full variable space is still a big challenge.
Kai Xu +6 more
doaj +1 more source
Phase flow rate measurements of annular flows [PDF]
In the international oil and gas industry multiphase annular flow in pipelines and wells is extremely important, but not well understood. This thesis reports the development of an efficient and cheap method for measuring the phase flow rates in two phase
Al-Yarubi, Qahtan
core +3 more sources
A simple analytical model to study and control azimuthal instabilities in annular combustion chambers [PDF]
, 2012 This study describes a simple analytical method to compute the azimuthal modes appearing in annular combustion chambers and help analyzing experimental, acoustic and LES (Large Eddy Simulation) data obtained in these combustion chambers. It is based on
Wolf, Pierre +5 more
core +1 more source
Известия Томского политехнического университета: Инжиниринг георесурсов, 2019 The relevance of the research is caused by the need to solve the problem of removal of gas accumulating in the annular space of oil producing wells at the inlet of a submersible centrifugal pump.
Diana A. Saracheva +2 more
doaj +1 more source
Flow Characteristics and Sizing of Annular Seat Valves for Digital Displacement Machines [PDF]
Modeling, Identification and Control, 2018 This paper investigates the steady-state flow characteristics and power losses of annular seat valves for digital displacement machines. Annular seat valves are promising candidates for active check-valves used in digital displacement fluid power ...
Christian Nørgård +3 more
doaj +1 more source
Thermal and Flow Characteristics in a Concentric Annular Heat Pipe Heat Sink
Energies, 2020 A concentric annular heat pipe heat sink (AHPHS) was proposed and fabricated to investigate its thermal behavior. The present AHPHS consists of two concentric pipes of different diameters, which create vacuumed annular vapor space.
Eui-Hyeok Song +3 more
doaj +1 more source
Frontiers in Physics, 2022 The trapped annular pressure (TAP) caused by thermal expansion is one of the serious challenges for the safe production of a deep gas well. Therefore, this article proposes a model to calculate the temperature profile of the deep gas well based on the ...
Bo Zhang +6 more
doaj +1 more source
Using LES to Study Reacting Flows and Instabilities in Annular Combustion Chambers [PDF]
, 2011 Great prominence is put on the design of aeronautical gas turbines due to increasingly stringent regulations and the need to tackle rising fuel prices.
Pierre Wolf +9 more
core +1 more source