scholarly journals Cavitation damage observations within scroll expander lubrication systems

2010 ◽  
Author(s):  
I. Tzanakis ◽  
M. Hadfield ◽  
A. Georgoulas ◽  
N. Kotsovinos
Keyword(s):  
Cavitation Damage ◽  
Scroll Expander

Cavitation damage incubation with typical fluids applied to a scroll expander system

2011 ◽  
Vol 44 (12) ◽  
pp. 1668-1678 ◽  
Author(s):  
I. Tzanakis ◽  
M. Hadfield ◽  
N. Garland
Keyword(s):  
Cavitation Damage ◽  
Scroll Expander

Cavitation damage of materials in liquid nitrogen

1969 ◽  
Vol 4 (1) ◽  
pp. 78-79
Author(s):  
D. N. Bol'shutkin ◽  
Yu. E. Krot
Keyword(s):  
Liquid Nitrogen ◽  
Cavitation Damage

A study of the collapse of arrays of cavities

1988 ◽  
Vol 190 ◽  
pp. 409-425 ◽  
Author(s):  
J. P. Dear ◽  
J. E. Field
Keyword(s):  
Shock Wave ◽  
High Speed ◽  
High Speed Photography ◽  
Cavitation Damage ◽  
Major Mechanism ◽  
Collapse Mechanisms ◽  
Multiple Jets ◽  
Circular Holes ◽  
Schlieren Photography ◽  
Thick Glass

This paper describes a method for examining the collapse of arrays of cavities using high-speed photography and the results show a variety of different collapse mechanisms. A two-dimensional impact geometry is used to enable processes occurring inside the cavities such as jet motion, as well as the movement of the liquid around the cavities, to be observed. The cavity arrangements are produced by first casting water/gelatine sheets and then forming circular holes, or other desired shapes, in the gelatine layer. The gelatine layer is placed between two thick glass blocks and the array of cavities is then collapsed by a shock wave, visualized using schlieren photography and produced from an impacting projectile. A major advantage of the technique is that cavity size, shape, spacing and number can be accurately controlled. Furthermore, the shape of the shock wave and also its orientation relative to the cavities can be varied. The results are compared with proposed interaction mechanisms for the collapse of pairs of cavities, rows of cavities and clusters of cavities. Shocks of kbar (0.1 GPa) strength produced jets of c. 400 m s−1 velocity in millimetre-sized cavities. In closely-spaced cavities multiple jets were observed. With cavity clusters, the collapse proceeded step by step with pressure waves from one collapsed row then collapsing the next row of cavities. With some geometries this leads to pressure amplification. Jet production by the shock collapse of cavities is suggested as a major mechanism for cavitation damage.

Testing of a Scroll Expander in Various Modes

2015 ◽  
Vol 51 (1-2) ◽  
pp. 33-36 ◽  
Author(s):  
V. A. Voronov ◽  
V. P. Leonov
Keyword(s):  
Scroll Expander

Preliminary Review of the Influence of Cavitation Behavior in Creep Damage Constitutive Equations

2014 ◽  
Vol 940 ◽  
pp. 46-51 ◽  
Author(s):  
Xin Yang ◽  
Qiang Xu ◽  
Zhong Yu Lu ◽  
Simon Barrans
Keyword(s):  
Reference Value ◽  
Creep Damage ◽  
Preliminary Review ◽  
Current Application ◽  
Cavitation Damage ◽  
X Ray ◽  
Creep Cavitation ◽  
Cr Steels ◽  
Cavitation Behavior ◽  
Damage Equation

This review paper mainly consists of from two aspects: (a) the evolution of the cavitation damage equation from Dyson to current application in high Cr steels by traditional techniques; (b) quantitation analyses of cavitation behavior in brass, copper, dual phase steel from X-ray microtomtograph. Though there is a lack of experimental data for high Cr steels by X-ray microtomography currently, but (b) has provided reference value for studying creep cavitation behavior in high Cr steels. This paper will be the fundamental of development new creep damage constitutive equation through quantitation analyses of X-ray tomography.

Cavitation Damage Characteristics of Shot Peened ALBC3 Alloy

2019 ◽  
Vol 19 (2) ◽  
pp. 1111-1113
Author(s):  
Il-Cho Park ◽  
Min-Su Han ◽  
Seong-Jong Kim
Keyword(s):  
Cavitation Damage ◽  
Damage Characteristics
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