Results 11 to 20 of about 3,324,854 (290)

Internal Model Control for a Light-Weight Active Noise-Reducing Casing [PDF]

open access: yesArchives of Acoustics, 2016
The active noise-reducing casing developed and promoted by the authors in recent publications have multiple advantages over other active noise control methods.
Krzysztof MAZUR, Marek PAWEŁCZYK
doaj   +2 more sources

Methods for Controlling Gas Turbine Casing Flows During Engine Shutdown [PDF]

open access: yesInternational Journal of Turbomachinery, Propulsion and Power, 2018
During the shutdown of a gas turbine, natural convection flows occur inside of the engine casing. These natural convection flows cause the top of the engine casing to cool more slowly than the bottom of the casing.
Andrew Pilkington   +2 more
doaj   +2 more sources

Review of casing while drilling technology [PDF]

open access: yesPodzemni Radovi, 2016
Conventional drilling methods have been plagued with huge operational and financial challenges, such as cost of purchasing, inspecting, handling, transporting the drill equipment and most importantly, tripping in-and-out of the drill string whenever the ...
Pavković Bojan   +2 more
doaj   +3 more sources

Exploration of the impacts of cement sheath on casing stress based on the arching effects of formations [PDF]

open access: yesMeitian dizhi yu kantan
ObjectiveWith the growth in the demand for natural oil and gas and the technological progress of their production, the oil and gas well depths have been constantly setting new records.
Fengchen AN   +6 more
doaj   +2 more sources

Numerical investigation of recess casing treatments in axial flow fans [PDF]

open access: yes, 2003
T he casing treatment technique for the axial fan has never been more significant since its potential applications were recognized in gas turbines, tunnel ventilation and many other industrial applications where the axial fan would benefit from the ...
Ghila, Abdurazag M.
core   +7 more sources

Activating Case-Based Reasoning with Active Databases [PDF]

open access: yes, 2000
Many of today's CBR systems are passive in nature: they require human users to activate them manually and to provide information about the incoming problem explicitly. In this paper, we present an integrated system that combines CBR system with an active database system.
Li, Sheng, Yang, Qiang
openaire   +3 more sources

An Asymptomatic Case of Radiologically Active Neurocysticercosis [PDF]

open access: yesCureus, 2020
The case describes an 82-year-old right-handed Hispanic male with multiple chronic comorbidities complaining of upper and lower extremity weakness as well as paresthesias that had been worsening over the last two weeks. He had bilateral upper and lower extremity weakness that was worse on the right and he complained of not being able to walk on his own
Ronen, Joshua A   +3 more
openaire   +4 more sources

Low-Pressure Turbine Cooling Systems

open access: yesEncyclopedia, 2021
Modern low-pressure turbine engines are equipped with casings impingement cooling systems. Those systems (called Active Clearance Control) are composed of an array of air nozzles, which are directed to strike turbine casing to absorb generated heat. As a
Krzysztof Marzec
doaj   +1 more source

INVESTIGATION OF THERMAL FIELD IN A WELL UNDER FLUID MOVEMENT UNDER INDUCTION IMPACT

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2023
Relevance. One of the promising methods of field geophysical studies of wells is active thermometry. The technology of conducting research by this method includes local induction heating of a metal casing, registration and analysis of changes in the ...
Filyus F. Davletshin   +4 more
doaj   +1 more source

A Comparison of Single-Entry and Multiple-Entry Casing Impingement Manifolds for Active Thermal Tip Clearance Control

open access: yesInternational Journal of Turbomachinery, Propulsion and Power, 2021
In this paper, we compare using computational fluid dynamics the aero-thermal performance of two candidate casing manifolds for supplying an impingement-actuated active tip clearance control system for an aero-engine high-pressure turbine.
Priyanka Dhopade   +3 more
doaj   +1 more source

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