The effect of temperature on the soot onset chemistry in one-dimensional, atmospheric-pressure, premixed ethylbenzene flames

2008 ◽  
Vol 155 (1-2) ◽  
pp. 232-246 ◽  
Author(s):  
Ali Ergut ◽  
Rick J. Therrien ◽  
Yiannis A. Levendis ◽  
Henning Richter ◽  
Jack B. Howard ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Effect Of Temperature ◽  
One Dimensional

Effect of Temperature Variation on Clamp Load of Bolted Joints

2014 ◽  
Vol 633-634 ◽  
pp. 1179-1186
Author(s):  
Shi Yuan Hou ◽  
Ri Dong Liao ◽  
Zheng Kun Cheng
Keyword(s):  
Mathematical Model ◽  
Elevated Temperature ◽  
Temperature Variation ◽  
Creep Behavior ◽  
Bolted Joints ◽  
Effect Of Temperature ◽  
Bolted Joint ◽  
One Dimensional ◽  
Nonlinear Variation ◽  
Relevant Factors

Considering the elastic-plastic and creep behavior of the material of bolted joint, and the nonlinear variation of its properties with temperature, this paper proposed a one-dimensional mathematical model for predicting clamp load variation with cyclic elevated-temperature. Then, relevant factors which may affect the process are studied, and some measures to enhance the threaded fitting reliability are proposed.

Effect of temperature and atmospheric pressure on methane (CH4) ebullition from near-surface peats

2006 ◽  
Vol 33 (18) ◽  
pp. n/a-n/a ◽  
Author(s):  
E. Kellner ◽  
A. J. Baird ◽  
M. Oosterwoud ◽  
K. Harrison ◽  
J. M. Waddington
Keyword(s):  
Atmospheric Pressure ◽  
Effect Of Temperature ◽  
Near Surface

Oxygen Plasma Induced ZnO-CuO Nanostructure Growth on a Brass Substrate by Atmospheric-Pressure Plasma Jet

2011 ◽  
Vol 688 ◽  
pp. 186-190 ◽  
Author(s):  
Hao Long Chen ◽  
Zin Ching Liou ◽  
Shian Jang Lin
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Nano Particles ◽  
Atmospheric Pressure Plasma Jet ◽  
Zno Nanostructures ◽  
One Dimensional ◽  
Pressure Plasma ◽  
Nano Crystal

A convenient method for direct and large-area growth of one-dimensional (1-D) CuO and ZnO nanostructures on a conductive brass substrate has been developed. The ZnO and CuO nanostructures have been simultaneously induced and growth on a brass (70Cu-30Zn alloy) substrate by using an atmospheric-pressure plasma jet (APPJ) with pure oxygen as the reaction gas in an ambient environment. Various one-dimensional (1-D) nanostructures such as nano-particles, nanowires, nanobelts, nanocombs, and nanosheets have been in situ grown on the brass substrates under different plasma treatment times. The plasma power of 150W and scanning speed of sample stage 1 mm/sec with different treating times were used in plasma surface treatment processing. The nano-scaled ZnO and CuO formation and its structure were characterized by means of grazing-incidence X-ray diffraction, Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). The results showed that the nano-scaled CuO and ZnO growth process was as follows: nano-particles, nano-crystal clusters then nano-crystal columns with increasing plasma treatment times. The growth of nano-scaled oxide formed in sequence that CuO was first grew on the brass substrate then ZnO. The morphologies of nano-scaled ZnO resembled bulbs and long-legged tetrapods. However, the morphologies of nano-scaled CuO were likely bulbs and flake nanostructures. This approach could prepare CuO and ZnO nanostructures on a brass substrate without size limitations. The possible growth mechanisms and structure of nano-scaled CuO and ZnO are discussed in this paper. The simplicity of the preparation procedure and the potential technological of the product were be interested in this study.

scholarly journals The effects of hydrodynamic stretch on the flame propagation enhancement of ethylene by addition of ozone

2015 ◽  
Vol 373 (2048) ◽  
pp. 20140339 ◽  
Author(s):  
Matthew Pinchak ◽  
Timothy Ombrello ◽  
Campbell Carter ◽  
Ephraim Gutmark ◽  
Viswanath Katta
Keyword(s):  
Heat Release ◽  
Flame Propagation ◽  
Atmospheric Pressure ◽  
Flame Speed ◽  
Two Dimensional ◽  
Axial Stretch ◽  
Exit Velocity ◽  
One Dimensional ◽  
Burner Exit ◽  
Steady Laminar

The effect of O 3 on C 2 H 4 /synthetic-air flame propagation at sub-atmospheric pressure was investigated through detailed experiments and simulations. A Hencken burner provided an ideal platform to interrogate flame speed enhancement, producing a steady, laminar, nearly one-dimensional, minimally curved, weakly stretched, and nearly adiabatic flame that could be accurately compared with simulations. The experimental results showed enhancement of up to 7.5% in flame speed for 11 000 ppm of O 3 at stoichiometric conditions. Significantly, the axial stretch rate was also found to affect enhancement. Comparison of the flames for a given burner exit velocity resulted in the enhancement increasing almost 9% over the range of axial stretch rates that was investigated. Two-dimensional simulations agreed well with the experiments in terms of flame speed, as well as the trends of enhancement. Rate of production analysis showed that the primary pathway for O 3 consumption was through reaction with H, leading to early heat release and increased production of OH. Higher flame stretch rates resulted in increased flux through the H+O 3 reaction to provide increased enhancement, due to the thinning of the flame that accompanies higher stretch, and thus results in decreased distance for the H to diffuse before reacting with O 3 .

Effect of temperature and/or pressure on lactoperoxidase activity in bovine milk and acid whey

2001 ◽  
Vol 68 (4) ◽  
pp. 625-637 ◽  
Author(s):  
LINDA R. LUDIKHUYZE ◽  
WENDIE L. CLAEYS ◽  
MARC E. HENDRICKX
Keyword(s):  
High Temperature ◽  
Atmospheric Pressure ◽  
Thermal Inactivation ◽  
Bovine Milk ◽  
Antagonistic Effect ◽  
Effect Of Temperature ◽  
Pressure Treatment ◽  
First Order ◽  
First Order Kinetics ◽  
High Temperature Sensitivity

At atmospheric pressure, inactivation of lactoperoxidase (LPO) in milk and whey was studied in a temperature range of 69–73 °C and followed first order kinetics. Temperature dependence of the first order inactivation rate constants could be accurately described by the Arrhenius equation, with an activation energy of 635·3±70·7 kJ/mol for raw bovine milk and 736·9±40·9 kJ/mol for diluted whey, indicating a very high temperature sensitivity. On the other hand, LPO is very pressure resistant and not or only slightly affected by treatment at pressure up to 700 MPa combined with temperatures between 20 and 65 °C. Both for thermal and pressure treatment, stability of LPO was higher in milk than in diluted whey. Besides, a very pronounced antagonistic effect between high temperature and pressure was observed, i.e. at 73 °C, a temperature where thermal inactivation at atmospheric pressure occurs rapidly, application of pressure up to 700 MPa exerted a protective effect. At atmospheric pressure, LPO in diluted whey was optimally active at a temperature of about 50 °C. At all temperatures studied (20–60 °C), LPO remained active during pressure treatment up to 300 MPa, although the activity was significantly reduced at pressures higher than 100 MPa. The optimal temperature was found to shift to lower values (30–40 °C) with increasing pressure.

Vortex dynamics during N–S and S–N transitions of Y–Ba–Cu–O superconductors under the effect of temperature gradient and thermal cycling

1997 ◽  
Vol 12 (11) ◽  
pp. 3090-3098 ◽  
Author(s):  
I. Kirschner ◽  
A. C. Bódi ◽  
R. Laiho ◽  
L. Lähderanta
Keyword(s):  
Temperature Gradient ◽  
Physical Environment ◽  
Variable Temperature ◽  
Ac Susceptibility ◽  
Vortex Motion ◽  
Effect Of Temperature ◽  
One Dimensional ◽  
Nonequilibrium Temperature ◽  
The One ◽  
Flux Expulsion

AC susceptibility of ac has been measured simultaneously in three different ranges of Y–Ba–Cu –O ceramic samples in the presence of a large and variable temperature gradient. The results obtained for normal-superconducting or superconducting-normal transitions under the effect of the one-dimensional nonequilibrium temperature distribution reveal the vortex motion to consist of not only conventional flux expulsion (or flux penetration), but flux exchange too, appearing between different ranges of samples and between samples and their close physical environment. The thermal cycles are shown to represent a supplementary heat treatment, increasing the homogeneity of the sample and decreasing the pinning, which accelerate the process of vortex motion.

One-dimensional electromagnetic band gap plasma structure formed by atmospheric pressure plasma inhomogeneities

2017 ◽  
Vol 122 (8) ◽  
pp. 083302 ◽  
Author(s):  
V. S. Babitski ◽  
Th. Callegari ◽  
L. V. Simonchik ◽  
J. Sokoloff ◽  
M. S. Usachonak
Keyword(s):  
Band Gap ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Structure ◽  
Electromagnetic Band Gap ◽  
One Dimensional ◽  
Pressure Plasma
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