This thesis describes an investigation into the use of the Time Marching method for the solution of two-dimensional nucleating flows of steam. The treatment has been applied to experimental measurements on two cascades of blade profiles a nozzle and a rotor tip section. The literature survey covers the early investigations of condensations in flowing steam, the development of nucleation theory, droplet growth laws and their applications to one dimensional steam flows. The general development of the Time Marching technique is considered next. The conservation equations governing the non-steady, two-dimensional and inviscid flows including the additional terms to allow for the two phase effects in relation to a standard H-grid are described next. This is then followed by the description of the refinements introduced to increase the accuracy of the solutions. The treatment of viscous effects is by viscous-inviscid interaction. The boundary layer equations using the integral method are described next and this is followed by the description of a base pressure model used in the calculations. A description of the experimental facility is presented next. The facility is a blow down tunnel for the study of two-dimensional two-phase flows. Blade surface pressures, density distribution, droplet size, wetness fraction and mass flow rates can be determined using the instrumentation. The results of theoretical solutions and experimental measurements are presented next. The conditions consist of superheated and nucleating flows in a nozzle and a rotor cascade. The agreement obtained between the theoretical and experimental results is satisfactory.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:643569 |
| Date | January 1991 |
| Creators | Mahpeykar, M. R. |
| Publisher | University of Birmingham |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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