23 Experimental Procedures

The naphthalene sublimation technique is used for obtaining mass transfer coefficients on the naphthalene blade surfaces, which are exposed to the flow in the linear turbine cascade. Following steps are required for the measurements.

1. naphthalene casting for the blade surface and tip.

2. naphthalene blade and tip surface profile measurement before-run.

3. wind tunnel run with naphthalene blade installed in the linear cascade.

4. naphthalene blade and tip surface profile measurement after-run.

5. data reduction after the experiment,

From the beginning of the second step, a hand timer is started to record the time for each procedure conducted until the start of the forth step.This is used during the data reduction, in order to account for the sublimation due to natural convection during the setup.

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