Loss of frequency response along sampling tubes for the measurements of gaseous composition at high temperature and pressures

1989 ◽  
Vol 208 ◽  
pp. 25-43 ◽  
Author(s):  
Ronald Smith
Keyword(s):  
High Temperature ◽  
Frequency Response ◽  
Steady Flow ◽  
Hostile Environment ◽  
Flow Properties ◽  
Monitoring Equipment ◽  
Low Speed ◽  
Gaseous Composition ◽  
Temporal Variance

Measurements of the rapidly changing gaseous composition in engines at low speed can be made via narrow tubes which convey the gases to monitoring equipment in a less hostile environment. This paper quantifies the extent to which the tube smooths out any changes in concentration. Exact (and approximate) formulae are derived for the temporal variance as weighted double (and single) integrals of the steady flow properties along the tube. Such is the non-uniformity that typically the region near the engine contributes 100 times as much to the spreading as does the region near the monitoring equipment. The advantages of keeping the sampling tubes short and heated are made explicit.

Frequency response of AC susceptibility in high temperature superconductors

2005 ◽  
Vol 135 (3) ◽  
pp. 203-207 ◽  
Author(s):  
S.L. Liu ◽  
G.J. Wu ◽  
X.B. Xu ◽  
J. Wu ◽  
H.M. Shao ◽  
...  
Keyword(s):  
High Temperature ◽  
Frequency Response ◽  
Ac Susceptibility ◽  
High Temperature Superconductors

Influence of concentration and mannuronate/gluronate ratio on steady flow properties of alginate aqueous systems

Biorheology ◽  
1992 ◽  
Vol 29 (4) ◽  
pp. 411-417 ◽  
Author(s):  
Takayoshi Matsumoto ◽  
Masahiro Kawai ◽  
Toshiro Masuda
Keyword(s):  
Steady Flow ◽  
Aqueous Systems ◽  
Flow Properties

Study on Bonding Properties of Copper and Aluminum in Nano Scale Using Molecular Dynamics Simulation

2012 ◽  
Vol 152-154 ◽  
pp. 183-187 ◽  
Author(s):  
Quang Cherng Hsu ◽  
Yen Yu Cheng ◽  
Bao Hsin Liu
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Bonding Strength ◽  
High Speed ◽  
Tensile Force ◽  
Pure Aluminum ◽  
Pure Copper ◽  
Dynamics Simulation ◽  
Low Speed ◽  
Speed Condition

According to MD simulation results, pressing depth between two bonding materials will affect bonding strength. Alloy material (Al0.9Cu0.1) had void defect phenomenon in low bonding speed condition because the increasing chance of atom migration which will result in low bonding strength. High tensile speed causes material fracture phenomena happen earlier than low speed. Material stress in low speed is smaller than in high speed. Fracture morphology of material is different in different tensile speed. In low speed condition, material can be stretched thinner than in high speed condition. Material in high temperature has greater kinetic energy than low temperature; therefore, material in high temperature has better formability and behaves larger tensile strain than low temperature. For pure aluminum, when temperature raises to 900K which is close to melting point (933K), its crystal structure is no longer belongs to F.C.C. structure, so bonding strength is weaker than low temperature. Large size material has larger contact area than small size material; therefore, the tensile force and tensile strength of the former are larger than the latter. The order of bonding strength for these three materials is: binary alloy > pure copper > pure aluminum.

scholarly journals A quantitative approach to assess high temperature flow properties of a PA 12 powder for laser sintering

2020 ◽  
Vol 33 ◽  
pp. 101143 ◽  
Author(s):  
David Ruggi ◽  
Claire Barrès ◽  
Jean-Yves Charmeau ◽  
René Fulchiron ◽  
Diego Barletta ◽  
...  
Keyword(s):  
High Temperature ◽  
Laser Sintering ◽  
Quantitative Approach ◽  
Flow Properties

Bulk flow properties of sieved samples of a ceramic powder at ambient and high temperature

2016 ◽  
Vol 288 ◽  
pp. 379-387 ◽  
Author(s):  
Roberto Chirone ◽  
Diego Barletta ◽  
Paola Lettieri ◽  
Massimo Poletto
Keyword(s):  
High Temperature ◽  
Ceramic Powder ◽  
Bulk Flow ◽  
Flow Properties

The steady flow of closely fitting incompressible elastic spheres in a tube

1978 ◽  
Vol 87 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Hüsnü Tözeren ◽  
Richard Skalak
Keyword(s):  
Shear Modulus ◽  
Steady Flow ◽  
Elastic Material ◽  
Displacement Field ◽  
Series Solution ◽  
Cylindrical Tube ◽  
Lubrication Theory ◽  
Flow Properties ◽  
Circular Cylindrical Tube ◽  
Neutrally Buoyant

The steady flow of a suspension of closely fitting, neutrally buoyant, incompressible and elastic spheres through a circular cylindrical tube is investigated under the assumption that lubrication theory is valid in the fluid region. A series solution giving the displacement field of an elastic incompressible sphere under axisymmetrically distributed surface tractions is developed. It is found that, for closely fitting particles, flow properties of the suspension are strongly dependent on the shear modulus of the elastic material and the velocity of the particle.

scholarly journals Converged statistics for time-resolved measurements in low-speed axial fans using high-frequency response probes

2014 ◽  
Vol 54 ◽  
pp. 71-84 ◽  
Author(s):  
J.M. Fernández Oro ◽  
K.M. Argüelles Díaz ◽  
M. Rodríguez Lastra ◽  
M. Galdo Vega ◽  
B. Pereiras García
Keyword(s):  
Frequency Response ◽  
High Frequency ◽  
Time Resolved ◽  
Low Speed ◽  
High Frequency Response ◽  
Axial Fans ◽  
Time Resolved Measurements
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