Results 211 to 220 of about 36,806 (247)

Compressible flow hot-wire calibration

Experiments in Fluids, 1997
A resistance thermal anemometer operated in compressible flow is sensitive to density, velocity, and total temperature fluctuations. To address these effects, a relatively inexpensive compressible flow calibration facility has been developed and tested.
R. Johnston, S. Fleeter
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Dissolution Kinetics of Hot Compressed Oxide Glasses

The Journal of Physical Chemistry B, 2017
The chemical durability of oxide glasses is an important property for a wide range of applications and can in some cases be tuned through composition optimization. However, these possibilities are relatively limited because around 3/5 of the atoms in most oxide glasses are oxygens. An alternative approach involves post-treatment of the glass.
Nerea Mascaraque, Mathieu Bauchy, José Luis G. Fierro, Sylwester J. Rzoska, Michal Bockowski, Morten M. Smedskjaer   +5 more
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Cooking cellulose in hot and compressed water

Chemical Communications, 2006
Crystalline-to-amorphous transformation of cellulose in water, just like that for starch upon cooking called gelatinisation, is revealed at 320 degrees C and 25 MPa.
Shigeru, Deguchi, Kaoru, Tsujii, Koki, Horikoshi   +2 more
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Quinacridone Solubility in Hot-Compressed Water

Journal of Chemical & Engineering Data, 2007
The solubility of quinacridone in hot-compressed water was measured for the first time at temperatures from (453.4 to 592.9) K and at a pressure of 24 MPa with a flow-type apparatus. The solubility varied from 1.07 × 10-5 mol·kg-1 at 453.4 K to 5.89 × 10-3 mol·kg-1 at 592.9 K.
Kiwamu Sue, Toshihiko Usami, Kunio Arai, Hitoshi Kasai, Hachiro Nakanishi, Toshihiko Hiaki   +5 more
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Hot Deformation Behavior during the Hot Compression of AZ31 Alloy

Advanced Materials Research, 2010
The hot deformation behavior of as-cast AZ31 magnesium alloys have been investigated at 200~400°C and strain rates 0.001~1s-1 by means of hot compression tests on a Gleeble-1500D thermal-mechanical simulator. We have analyzed the flow stress-strain curve and presented the constitutive equation by calculating stress exponent, activation energy and Zemer-
Shu Li Sun, Min Gang Zhang, Wen Wu He, Jun Qi Zhou, Gang Sun   +4 more
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A regular hot-powder compression regime

Journal of Engineering Physics, 1990
We propose a new analytical solution for the problem familiar from the theory of hot compression in connection with the axial unilateral compression of a viscous porous material in a cylindrical mold.
A. M. Stolin, N. N. Zhilyaeva, B. M. Khusid   +2 more
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Hot-wire measurements in compressible flows

International Congress on Instrumentation in Aerospace Simulation Facilitie, 2003
Conditions for hot-wire fluctuation measurements at high velocities are considered. Particular attention is given to the determination of sensitivity coefficients, the conditions for the application of constant-resistance and constant-current anemometers, and measurements at supersonic velocities. It is concluded that high-velocity measurements will be
V.A. Lebiga, V.N. Zinoviev
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Acrolein synthesis from glycerol in hot-compressed water

Bioresource Technology, 2007
Glycerol conversion was conducted in hot-compressed water (HCW: 573-673 K, 25-34.5 MPa) using a batch and a flow apparatus and the influences of temperature, H(2)SO(4), glycerol concentration, and pressure, were examined. The yield of acrolein was enhanced by higher glycerol and H(2)SO(4) concentration, and higher pressure.
Masaru, Watanabe, Toru, Iida, Yuichi, Aizawa, Taku M, Aida, Hiroshi, Inomata   +4 more
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Compressive creep behaviour of hot-pressed PbTe

Scripta Materialia, 2017
Abstract Creep deformation is of concern in PbTe thermoelectric modules operating for years at high homologous temperatures while being subjected to internal or external stresses. The creep strain rates of hot-pressed PbTe are measured at 400 °C; a power-law is found, with a stress exponent n  = 1.7 at low stresses (2–7 MPa) and n  = 4.4 at high ...
C.C. Li, G.J. Snyder, D.C. Dunand
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Hot-Compression Testing

2005
Abstract This article describes the use of compression tests, namely, cylindrical compression, ring compression, and plane-strain compression tests at elevated temperatures. It discusses the effects of the temperature, strain rate, and deformation heating on metals during the cylindrical compression test, with the help of flow curves ...
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