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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Häring, M. Weigand, B. |
| Copyright Year | 1995 |
| Abstract | The naphthalene sublimation technique is based on the analogy between mass and heat transfer. This analogy is only fully valid for incompressible flow and if the Prandtl and Schmidt number are equal. In the present investigation the energy- and mass transfer equations were solved simultaneously to establish an analogy function which allows the calculation of the Nusselt number from the Sherwood number in function of the Mach, the Prandtl and the Schmidt number. For a laminar flow this new analogy function is based on similarity solutions of the conservation equations for high Mach number flows. Also a numerical investigation was conducted to study the influence of the pressure gradient and the Soret effect as well as varying fluid properties. For a turbulent flow, a flat plate solution was established for Pr=1. Energy and mass transfer equations were additionally solved for a two dimensional duct flow to study the influence of the Prandtl number on the analogy function independently. The resulting analytical and numerical solutions are shown for various pressure gradients, Prandtl and Mach numbers. In addition, approximations for the analogy function are derived. The influence of the present theory on heat transfer measurements on a turbine airfoil is shown. The theory is validated against experimental results in Häring et. al. (1995) showing a good agreement between the heat transfer coefficients calculated with the new analogy function and measurements of actual heat transfer. |
| Sponsorship | International Gas Turbine Institute |
| File Format | |
| ISBN | 9780791878811 |
| DOI | 10.1115/95-GT-017 |
| Volume Number | Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration |
| Conference Proceedings | ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition |
| Language | English |
| Publisher Date | 1995-06-05 |
| Publisher Place | Houston, Texas, USA |
| Access Restriction | Open |
| Subject Keyword | Turbulence Approximation Flat plates Ducts Airfoils Pressure gradient Flow (dynamics) Mass transfer Fluids Prandtl number Laminar flow Heat transfer coefficients Turbines Heat transfer Mach number |
| Content Type | Text |
| Resource Type | Article |
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