Pressure stresses generated due to supersonic steam jet induced hydrodynamic instabilities

Afrasyab Khan, Khairuddin Sanaullah, Mohd Sobri Takriff, Hushairi Zen, Andrew Ragai Henry Rigit, Ajmal Shah, Imran Rafiq Chughtai, Tahir Jamil

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The phenomenon that involves direct contact of steam with water is called Direct Contact Condensation (DCC). This phenomenon has been observed/prevailed in most of the power and process industries. The phenomenon of direct contact condensation involves heat, mass and momentum transfer across the highly fluctuating interface between steam jet and surrounding water giving this process an intricate nature to be studied. More recently the observation of hydrodynamic instabilities at the interface between supersonic steam jet and water has given a new facet to the study of DCC. In the current study the equivalent von-Mises Stress, equivalent elastic strain and total deformation in the Perspex vessel that has been incurred due to the pressure stresses has been studied. These pressure stresses have been generated due to the condensing supersonic steam jet induced hydrodynamic instabilities. It has been investigated first by experimentally observing the temperature fluctuations in axial and radial directions across supersonic steam jet which actually depicts these instabilities. Then Direct Contact Condensation (DCC) model has been used to conduct the CFD study using a commercial code Ansys®. Accompanied with this a mock up study has been done in which the pressure loads computed using DCC model have been coupled to the Perspex vessel structure using one way Fluid Structure Interaction (FSI) analysis in Ansys® to compute the true scale equivalent von-Mises Stress, equivalent elastic strain and total deformation generated by hydrodynamic instabilities induced pressure stresses. On true scale, hundreds of Pico scale deformation has been computed in the Perspex vessel confinement.

Original languageEnglish
Pages (from-to)44-63
Number of pages20
JournalChemical Engineering Science
Volume146
DOIs
Publication statusPublished - 2 Jun 2016

Fingerprint

Hydrodynamic Instability
Steam
Condensation
Hydrodynamics
Contact
Polymethyl Methacrylate
Vessel
Water
Momentum transfer
Fluid structure interaction
Process Industry
Contacts (fluid mechanics)
Computational fluid dynamics
Facet
Mass transfer
Heat transfer
Momentum
Heat
Fluctuations
Fluid

Keywords

  • Hydrodynamic
  • Instabilities
  • Pressure
  • Steam
  • Stress
  • Water

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Applied Mathematics
  • Industrial and Manufacturing Engineering

Cite this

Pressure stresses generated due to supersonic steam jet induced hydrodynamic instabilities. / Khan, Afrasyab; Sanaullah, Khairuddin; Takriff, Mohd Sobri; Zen, Hushairi; Rigit, Andrew Ragai Henry; Shah, Ajmal; Chughtai, Imran Rafiq; Jamil, Tahir.

In: Chemical Engineering Science, Vol. 146, 02.06.2016, p. 44-63.

Research output: Contribution to journalArticle

Khan, Afrasyab ; Sanaullah, Khairuddin ; Takriff, Mohd Sobri ; Zen, Hushairi ; Rigit, Andrew Ragai Henry ; Shah, Ajmal ; Chughtai, Imran Rafiq ; Jamil, Tahir. / Pressure stresses generated due to supersonic steam jet induced hydrodynamic instabilities. In: Chemical Engineering Science. 2016 ; Vol. 146. pp. 44-63.
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