Supercritical drop emission in strongly convective flows

J. W. Chae, K. W. Lee, H. H. Shin, W. S. Yoon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Supercritical droplet dynamics in forced-convective environment is numerically studied. A cryogenic oxygen droplet gasifying in axisymmetric gaseous nitrogen stream is analyzed by solving complete sets of time-dependent conservation equations of mass, momentum, energy, and species concentrations. Full account is taken of thermodynamic non-idealities and transport anomaly using a unified property evaluation scheme based on the fundamental equation of state and the extended corresponding-state principle. Results show that extent of thermodynamic and flow properties controls the droplet gasification and deformation. As the velocity of gas stream increases, the droplet aspect ratio gradually increases with pressure. The droplet lifetime is reduced primarily due to augmented convective momentum of nitrogen gas increasing with increase in ambient pressure. With reduction of diffusivity at high pressure, boundary layer at the rear of the droplet is detached. Occurrence of recirculation at the droplet interior is not perceptible.

Original languageEnglish
Title of host publication41st Aerospace Sciences Meeting and Exhibit
Publication statusPublished - 2003 Dec 1
Event41st Aerospace Sciences Meeting and Exhibit 2003 - Reno, NV, United States
Duration: 2003 Jan 62003 Jan 9

Other

Other41st Aerospace Sciences Meeting and Exhibit 2003
CountryUnited States
CityReno, NV
Period03/1/603/1/9

Fingerprint

convective flow
droplet
nitrogen
gas streams
gasification
conservation equations
diffusivity
cryogenics
aspect ratio
boundary layers
equations of state
thermodynamic properties
kinetic energy
occurrences
anomalies
momentum
life (durability)
thermodynamics
evaluation
oxygen

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Chae, J. W., Lee, K. W., Shin, H. H., & Yoon, W. S. (2003). Supercritical drop emission in strongly convective flows. In 41st Aerospace Sciences Meeting and Exhibit
Chae, J. W. ; Lee, K. W. ; Shin, H. H. ; Yoon, W. S. / Supercritical drop emission in strongly convective flows. 41st Aerospace Sciences Meeting and Exhibit. 2003.
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Chae, JW, Lee, KW, Shin, HH & Yoon, WS 2003, Supercritical drop emission in strongly convective flows. in 41st Aerospace Sciences Meeting and Exhibit. 41st Aerospace Sciences Meeting and Exhibit 2003, Reno, NV, United States, 03/1/6.

Supercritical drop emission in strongly convective flows. / Chae, J. W.; Lee, K. W.; Shin, H. H.; Yoon, W. S.

41st Aerospace Sciences Meeting and Exhibit. 2003.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Supercritical droplet dynamics in forced-convective environment is numerically studied. A cryogenic oxygen droplet gasifying in axisymmetric gaseous nitrogen stream is analyzed by solving complete sets of time-dependent conservation equations of mass, momentum, energy, and species concentrations. Full account is taken of thermodynamic non-idealities and transport anomaly using a unified property evaluation scheme based on the fundamental equation of state and the extended corresponding-state principle. Results show that extent of thermodynamic and flow properties controls the droplet gasification and deformation. As the velocity of gas stream increases, the droplet aspect ratio gradually increases with pressure. The droplet lifetime is reduced primarily due to augmented convective momentum of nitrogen gas increasing with increase in ambient pressure. With reduction of diffusivity at high pressure, boundary layer at the rear of the droplet is detached. Occurrence of recirculation at the droplet interior is not perceptible.

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Chae JW, Lee KW, Shin HH, Yoon WS. Supercritical drop emission in strongly convective flows. In 41st Aerospace Sciences Meeting and Exhibit. 2003