• Why a vibro-acoustical addition for common test procedures?
• Assessment of cavitation segments hidden from observation
• Quantification of visually reached cavitation description
• In particular, reliable quantitative comparison of different model versions
• Quantitative prediction of cavitation intensity on the prototype
• An illustration: Comparison of three models for the same turbine project
In a plan to improve the cavitation quality of a turbine in operation, its model was tested, and two modifications were conceived, and their models were also tested. This is a summary of the results in the simplest form:
Conclusions: The two new versions are much better than the version currently in use. At most operation points, the two new versions are quite similar. However, in the high-head high-flow operation, the middle version tends towards increased cavitation intensity (the yellow arrows). Even if such an increase of cavitation intensity is considered acceptable, the New runner/New guide vanes-version is recommended. The reason: the potential inaccuracy in the model-to-prototype prediction and in the prototype machining might provoke stronger cavitation at even lower loads.
• Required equipment
• Set of sensors, vibro-acoustical processor, interface with the test-rig processor and the laboratory database
• Measurement software
• Analysis software
This is incorporated in common test equipment and in a common procedure and does not require any action by the operator.
With some additions, the system can be used for on-site vibro-acoustical diagnostic tests, too.
• Services offered to turbine manufacturers and hydraulic laboratories
For vibro-acoustical cavitation tests:
• Delivery of the full equipment for model cavitation tests
• Delivery of the additions needed for on-site cavitation tests
• Alternatively, for both: delivery of the full application software & the detailed specifications of the hardware
• Instruction documentation, training
• Assistance at installation
• Introductory assistance in the interpretation of test results
• Remote support
For permanent on-site cavitation monitoring:
• Delivery of a prototype of the cavitation monitoring system
• Alternatively, delivery of the software & detailed specifications of the hardware
• For both: appropriate licence
Korto Cavitation Services
