Results 51 to 60 of about 79,452 (304)

Impact of Sustainable Binders Based on Lignin and Collagen on the Volume Stability and Mechanical Properties of MgO‐C Refractories with MgO‐C Recyclates

Advanced Engineering Materials, EarlyView.
Collagen hydrolysate is evaluated as a sustainable binder for MgO‐C refractories. Its thermally induced cross‐linking and gas release lead to expansion and cracking in large bricks, but tailored batches with lignin, recyclates, or fine graphite improve the gas release while thermal treatment and stability.
Till M. J. Stadtmüller, Florian Kerber, Kirsten Moritz, Steffen Dudczig, Konstantin Kraushaar, Thomas Schemmel, Jana Hubálková, Patrick Gehre, Christos G. Aneziris   +8 more
wiley   +1 more source

Analisa Performa Steam Jet Ejector Pltp Skala Kecil Pada Kondisi Operasi Berbeda [PDF]

, 2014
Telah dilakukan penelitian ejector untuk proses ekstraksi Non Condensable Gas (NCG) dengan menggunakan steam yang bergerak dengan kecepatan tinggi. Pada penelitian ini dilakukan variasi tekanan kondenser untuk mengetahui performa ejector pada kondisi ...
Khalida, Z. (Zulfa), Maryanto, S. (Sukir), Surana, T. (Taufan)   +2 more
core  

Main rotor-tail rotor intraction and its implications for helicopter directional control [PDF]

, 2008
Aerodynamic interference between the main and tail rotor can have a strong negative influence on the flight mechanics of a conventional helicopter. Significant unsteadiness in the tail rotor loading is encountered under certain flight conditions, but the
Brown, R.E., Fletcher, Timothy M.
core   +1 more source

Gourd‐Inspired Design of Unit Cell with Multiple Gradients for Physiological‐Range Pressure Sensing

Advanced Functional Materials, EarlyView.
Gourd‐shaped micro‐dome arrays with coordinated modulus, conductivity, and geometric gradients co‐optimize sensitivity and linearity in piezoresistive tactile sensors. Under pressure, a solid upper dome embeds into a porous lower dome, triggering rapid contact‐area growth and series‐to‐parallel conduction, enabling unsaturated, intensity‐resolved ...
Jiayi Xu, Ming Lei, Yuanzhe Liang, Biao Qi, Ziyi Dai, Yong Zhao, Bingpu Zhou   +6 more
wiley   +1 more source

CFD analysis and geometrical parameter investigation for the design of a high-efficiency supersonic ejector [PDF]

FME Transactions
This paper presents a CFD analysis of a supersonic ejector model for refrigeration systems. The model is validated by comparing it with previous studies and used to design a high-efficiency ejector.
Elgezzar M., Rashad A., Hassan M.S., Elnady T.   +3 more
doaj   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Performance analysis of zeotropic organic Rankine cycle with a vapor-liquid injector

Case Studies in Thermal Engineering
To improve the performance of small-scale organic Rankine cycle (ORC), an ORC with a vapor-liquid injector (IORC) using zeotropic mixture R601a/R245fa as working fluid is proposed.
Yuanfan Xiong, Yulie Gong, Bin Sun, Lingbao Wang, Huashan Li   +4 more
doaj   +1 more source

Experimental Investigation and Dynamic Fractal and Multi-fractal Analysis of the Density Current Patterns [PDF]

مهندسی منابع آب, 2020
Density current is caused by a slight density difference with the environmental fluid. These currents are of two-phase current type. These currents are non-linear in nature, which are complex and sensitive to initial conditions.
mohammad hosseini, mohammad hadi fattahi, saied eslamian   +2 more
doaj  

Optimal Subharmonic Entrainment [PDF]

, 2014
For many natural and engineered systems, a central function or design goal is the synchronization of one or more rhythmic or oscillating processes to an external forcing signal, which may be periodic on a different time-scale from the actuated process ...
Li, Jr-Shin, Zlotnik, Anatoly
core  

Transient ventilation dynamics following a change in strength of a point source of heat [PDF]

, 2008
We investigate the transient ventilation flow within a confined ventilated space, with high- and low-level openings, when the strength of a low-level point source of heat is changed instantaneously.
,, Bower, DJ, Caulfield, CP, Fitzgerald, SD, Woods, AW   +4 more
core   +2 more sources