Abstract
This article describes a measuring methods and evaluating measured data on a single-stage axial turbine with reaction (~ 50 %). One turbine operating mode was selected, in which the traversing behind the nozzle and bucket with two 5-hole pneumatic probes took place. The results are distributions of flow angles, reactions, or losses distribution/efficiencies along the blades.
Highlights
The experimental device (VT-400) is a 1:2 scale model of the high-pressure steam turbine part (Figure 1)
The turbine stage is located at the compressor suction
Static pressure taps are located in individual sections of the turbine, and two 5-hole pneumatic probes are used for detailed flow field measurement
Summary
The experimental device (VT-400) is a 1:2 scale model of the high-pressure steam turbine part (Figure 1). The working medium is air sucked from the atmosphere by a compressor. The turbine stage is located at the compressor suction. The mass flow of the working medium is determined by a standardized nozzle. Static pressure taps are located in individual sections of the turbine, and two 5-hole pneumatic probes are used for detailed flow field measurement. The department has three turbine stages with different reactions, which were designed by our industrial partner Doosan Skoda Power. Their basic geometric parameters are listed in the following table (Table 1 - the currently measured stage is marked in red)
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