scholarly journals Flashing and Shattering Phenomena of Superheated Liquid Jets.

1994 ◽  
Vol 37 (2) ◽  
pp. 313-321 ◽  
Author(s):  
Erasmus Mhina Peter ◽  
Akira Takimoto ◽  
Yujiro Hayashi
Keyword(s):  
Superheated Liquid ◽  
Liquid Jets

Flicker-Noise in Superheated Liquid Jets

2004 ◽  
Vol 35 (1-2) ◽  
pp. 59-66
Author(s):  
A. V. Reshetnikov ◽  
V. P. Skripov ◽  
V. P. Koverda ◽  
V. N. Skokov ◽  
N. A. Mazheiko ◽  
...  
Keyword(s):  
Flicker Noise ◽  
Superheated Liquid ◽  
Liquid Jets

Complete adiabatic evaporation of highly superheated liquid jets

1992 ◽  
Vol 236 ◽  
pp. 43-59 ◽  
Author(s):  
Th. Kurschat ◽  
H. Chaves ◽  
G. E. A. Meier
Keyword(s):  
Superheated Liquid ◽  
Liquid Jets ◽  
Final State ◽  
Supersonic Expansion ◽  
Cubic Equation ◽  
Physical Effects ◽  
Molecular Complexity ◽  
New Phenomena ◽  
Good Agreement ◽  
Adiabatic Evaporation

A nozzle expansion into a vacuum chamber was used to investigate the evaporation of highly superheated liquid jets. The large molar specific heat of fluids with high molecular complexity — in this case C6F14 — is responsible for the new phenomena reported here. A model was developed to describe the basic physical effects. A cubic equation of state was used to describe the thermodynamic properties of the fluid. The evaporation was modelled as a sonic deflagration followed by an axisymmetric supersonic expansion. As in the case of hypersonic gas jets the final state is reached by a normal shock. For sufficiently high temperatures and expansion ratios a complete adiabatic evaporation of the liquid was found. At even higher temperatures the liquid evaporates completely within a rarefaction discontinuity. The predictions of the model are in good agreement with the experimental results.

Critical superheat for flashing of superheated liquid jets

1986 ◽  
Vol 25 (2) ◽  
pp. 206-211 ◽  
Author(s):  
Yoshiro Kitamura ◽  
Hiroichi Morimitsu ◽  
Teruo Takahashi
Keyword(s):  
Superheated Liquid ◽  
Liquid Jets

The Breakup of Superheated Liquid Jets

1970 ◽  
Vol 92 (3) ◽  
pp. 515-521 ◽  
Author(s):  
John H. Lienhard ◽  
James B. Day
Keyword(s):  
Distribution Function ◽  
Liquid Nitrogen ◽  
Superheated Liquid ◽  
Liquid Jets ◽  
Superheated Water ◽  
Capillary Breakup ◽  
Subcooled Water ◽  
Breakup Length ◽  
Boltzmann Statistics

Observed average breakup lengths are presented for free orifice jets of superheated water and liquid nitrogen, and subcooled water. Dimensionless, semiempirical expressions are developed for both flashing, and aerodynamic and/or capillary, breakup, and verified with data. The distribution function for breakup length is predicted for the superheated case with the help of Boltzmann statistics.

scholarly journals Expansion rates of bubble clusters in superheated liquids

2017 ◽  
Author(s):  
Dirk Dietzel ◽  
Timon Hitz ◽  
Claus-Dieter Munz ◽  
Andreas Kronenburg
Keyword(s):  
Bubble Growth ◽  
Bubble Nucleation ◽  
Single Bubble ◽  
Liquid Oxygen ◽  
Superheated Liquid ◽  
Liquid Jets ◽  
Bubble Interactions ◽  
Multiple Bubbles ◽  
Conventional Models ◽  
The Individual

The present work analyses the growth of multiple bubbles in superheated liquid jets by means of direct numericalsimulations (DNS). A discontinuous Galerkin approach is used to solve the Euler equations and an adequate in- terface resolution is ensured by applying finite-volume sub-cells in cells with interfaces. An approximate Riemann solver has been adapted to account for evaporation and provides consistency of all conserved quantities across the interface. The setup mimics conditions typical for orbital manoeuvring systems when liquid oxygen (LOX) is injected into the combustion chamber prior to ignition. The liquid oxygen will then be in a superheated state, bubble nucleation will occur and the growth of the bubbles will determine the break-up of the liquid jet. The expansion rates of bubble groups under such conditions are not known and standard models rely on single bubble assumptions. This is a first DNS study on bubble-bubble interactions in flash boiling sprays and on the effects of these interactions on the growth rates of the individual bubbles. The present simulations resolve a small section of the jet close to the nozzle exit and the growth of bubble groups inside of the jet is analysed. The results suggest that an individual bubble within the group grows more slowly than conventional models for single bubble growth would predict. The reduction in bubble growth can amount to up to 30% and depends on the distances between the bubbles and the number of bubbles within the bubble group. In the present case, the volume expansion of the superheated liquiddecreases by approximately 50% if the distance between the bubbles is doubled.DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4714

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