Abstract
This contribution describes a new test rig for a two-stage axial turbine built in the VZLÚ. The test rig has replaced an original facility used for a full stage aerodynamics investigation. The motivation for the design of the new test facility was the limitations of the original one. The design is briefly discussed, and then the first measurement results are presented. The first operation was performed with a turbine stage already measured in the original facility. This allows the comparison of the most important quantities.
Highlights
The investigation of flow fields in turbomachines is one of the basic fields of research that VZLÚ has been engaged in for a long time
Since 2010, a measuring device has been put into operation at the VZLÚ, which enabled flow research on a single-stage axial turbine stage: measurement of integral characteristics using a water dynamometer and measurement of flow fields by traversing behind the stator and rotor blades [1], [2]
The bearing losses in the original facility were included in the calculation of the stage overall efficiency by an empirical formula based on the measurement of bearing warming
Summary
The investigation of flow fields in turbomachines is one of the basic fields of research that VZLÚ has been engaged in for a long time. Since 2010, a measuring device has been put into operation at the VZLÚ, which enabled flow research on a single-stage axial turbine stage: measurement of integral characteristics using a water dynamometer and measurement of flow fields by traversing behind the stator and rotor blades [1], [2]. Thanks to this device, it was possible to bring new knowledge to the research of flow in the turbine stages and a lot of data to refine the producer's design models [3], [4]. The above-mentioned new demand in the field of research, together with the broad experience gained by operating the existing experimental turbine, has necessitated the creation of a new test rig concept that would allow research on a two-stage axial test stage
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