Fin Shape Design for Stable Film-Wise Vapor Condensation in Microgravity

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

Under microgravity conditions, the dynamics of a thin condensate film on a curved surface is determined by the capillary pressure gradient proportional to the mean surface curvature gradient. A one-parameter family of axisymmetric surfaces is found for which the gradient of mean curvature is constant. The dimensionless equation for rotation angle of the generatrix curve is found. There is a single generatrix curve for an axisymmetric surface for which the rotation angle at the inflexion point assumes a predetermined value. Due to the constant gradient of capillary pressure on such a surface, a stable condensate flow is ensured under microgravity conditions. A similar curve for the planar case, known as the clothoid or "Cornu spiral", is used to find the best transition curve to get the smoothest traffic on the roads. A numerical model for film-wise vapor condensation on such surface has been built. The film thickness distribution and mass flow rate of the HFE-7100 along the cooled curvilinear fin have been calculated. Calculations were done both for terrestrial gravity and microgravity. This work proposes a particular surface shape, found numerically, for conducting experiments on the pure vapor condensation under microgravity conditions in Parabolic Flight Campaigns and onboard the International Space Station.

Язык оригиналаанглийский
Номер статьи8
ЖурналMicrogravity Science and Technology
Том34
Номер выпуска1
DOI
СостояниеОпубликовано - фев 2022

Предметные области OECD FOS+WOS

  • 1.01 МАТЕМАТИКА
  • 1.03 ФИЗИЧЕСКИЕ НАУКИ И АСТРОНОМИЯ
  • 2.11 ПРОЧИЕ ТЕХНОЛОГИИ
  • 2.03.IU ИНЖЕНЕРИЯ, МЕХАНИЧЕСКАЯ
  • 2.03.DT ТЕРМОДИНАМИКА

Fingerprint

Подробные сведения о темах исследования «Fin Shape Design for Stable Film-Wise Vapor Condensation in Microgravity». Вместе они формируют уникальный семантический отпечаток (fingerprint).

Цитировать