Results 111 to 120 of about 112,854 (317)

Numerical Investigation of Spray Formation in Coaxial Nozzles

open access: yes, 2008
In this paper the results of numerical investigation of atomization process of liquid fuel (Diesel) in Laval and coaxial nozzles are presented. The calculations have been performed using CFD codes of STAR-CD.
Konstantinov, Mikhail, Wagner, Claus
core  

Feature Extraction of Oscillating Flow with Vapor Condensation of Moist Air in a Sonic Nozzle

open access: yes, 2020
The sonic nozzle is commonly used in flow measurement. However, the non-equilibrium condensation phenomenon of moist air in the nozzle has a negative effect on the measuring accuracy.
Li, Yiming   +4 more
core   +1 more source

Development of PDC Bit with Axe-shaped Teeth and its Application in East China Sea

open access: yesShiyou jixie, 2021
The PDC bits used in many wells in the East China Sea had low ROP and small footage in the process of drilling deep formation. After the bits were pulled out, it was found that the cutting teeth had been worn severely.
Li Qian   +5 more
doaj  

Microsphere‐Templated Conductive Syntactic Foams for Recyclable and Additively Manufactured Soft Electronics

open access: yesAdvanced Healthcare Materials, EarlyView.
This work introduces a microsphere‐templated strategy to fabricate reprocessable PEDOT:PSS syntactic foams with tunable porosity, stable conductivity, and 3D printability. In situ PEDOT:PSS coatings create a conductive network that maintains electrical performance at high void fractions.
Gayaneh Petrossian   +7 more
wiley   +1 more source

TRANSONIC AFTERBODY SIMULATION

open access: yes, 2007
One challenge of numerical investigations of unsteady super- and hypersonic flow fields is the study of turbulent wake flow and the interaction with nozzle sections at modern launcher configurations.
Filimon, Alexander, Lüdeke, Heinrich
core  

Tough, Ductile, and Strong Hard‐Soft Cementitious Composite Enabled by Multi‐Material Additive Manufacturing

open access: yesAdvanced Materials, EarlyView.
Drawing inspiration from the layered hard‐soft architecture found in sea sponges, this work establishes a new framework for architected cementitious composites (ACC) through multi‐material additive manufacturing (MMAM) process. The integration of mortar and elastomer phases into layered architectures enables synergistic toughening mechanisms, including
Aimane Najmeddine   +5 more
wiley   +1 more source

Optimization of Jet Pig Nozzle Type for Gas Pipeline Based on CFD

open access: yesShiyou jixie, 2021
In the process of natural gas pipeline transportation, dust and other dirt are easy to adhere to the inner wall of the pipe, which reduces the efficiency of pipeline transmission and affects operation.
Li Yaxi, Tian Yuan, Deng Junzhe
doaj  

Freeform Manufacturing of Plant‐Based Structural Colors for Scalable Photonic and Mechanochromic Devices

open access: yesAdvanced Materials, EarlyView.
A green, freeform manufacturing approach that utilizes robust aqueous two‐phase systems to create intricate and scalable photonic structures and non‐planar mechanochromic hydrogel actuators from plant‐based hydroxypropyl cellulose. This approach broadens the structural possibilities of sustainable photonic devices and mechanochromic systems, offering ...
Xiao Song   +14 more
wiley   +1 more source

A theoretical study of the performance of resistojet nozzles

open access: yes, 1972
The theoretical development of four computer models of resistojet nozzle performance is reported. Five main energy loss processes are accounted for; these are (i) frozen chemical rate processes, (ii) finite rate vibrational relaxation, (iii) incomplete ...
Edwards, I.
core  

Development of Mach 3.6 water cooled facility nozzle [PDF]

open access: yes, 2013
This paper describes the design and development of Mach 3.6 water cooled facility nozzle using both analytical and computational approaches and highlights the subsequent experimental tests which showed that the results were in agreement with the ...
Srinivas, J   +7 more
core  

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