Abstract
An understanding of the complex behavior of gas mixed steam in its expansion through a turbine stage is essential to the design of efficient and reliable geothermal turbine units. The 1st Report described thermodynamic characteristics and performance of geothermal turbines and showed state equations of steam with noncondensable gases. This 2nd Report presents some experimental results on the behavior of steam with noncondensable gases, such as the equivalent flow coefficient, fluid dynamic loss characteristics and deviation angle in nozzles or cascades. The tests were carried out in a steam tunnel, and measurements were made using the Schlieren method, a pitot probe, and a wedge probe. Results and conclusions obtained from these tests are reported.
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