Abstract
The article describes the measurement methods and data evaluation from a single-stage axial turbine with high reaction (50%). Four operating modes of the turbine were selected, in which the wake traversing behind nozzle and bucket with five-hole pneumatic probes took place. The article further focuses on the evaluation of bucket losses for all four measured operating modes, including the analysis of measurement uncertainties.
Highlights
The methodology and rules for calculating a turbine blading efficiency in the turbine stages design is one of the most valuable and secret know-how of steam/gas turbine manufacturers
The acquisition of new data for efficiency prediction and research aimed at increasing efficiency is important and is the long-term development goal of all turbine manufacturers
The three turbine stages with different reactions, which were designed by industrial partner Doosan Skoda Power, can be investigated
Summary
The methodology and rules for calculating a turbine blading efficiency in the turbine stages design is one of the most valuable and secret know-how of steam/gas turbine manufacturers. DSPW, traditional impulse conception turbines manufacturers, developed 3D blading with a slightly increased root reaction. This blading already included the shaping of both the nozzle and bucket blades. The three turbine stages with different reactions, which were designed by industrial partner Doosan Skoda Power, can be investigated. Their basic geometric parameters are listed in the following table (see Table 1). The currently measured stage is marked in red.) [1,11]
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