• Why vibro-acoustical addition to common test procedures?
• Assessment of cavitation segments hidden to observation
• Quantification of visually reched cavitation description
• In particular, reliable quantitative comparison of different model versions
• Quantitative prediction of cavitation intensity on the prototype
• An illustration: Comparison of the three models for the same turbine project
Within 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. In 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 on even lower loads.
• Required equipment
• Set of sensors, vibro-acoustical processor, interface with the test-rig processor and the laboratory data base
• Measurement software
• Analysis software
This is incorporated into a common test equipment and procedure, and does not require any action of the operator.
With some additions, the system can be used for the on-site vibro-acoustical diagnostic tests, too.
• Services offered to the turbine manufacturers and hydraulical laboratories
For the vibro-acoustical cavitation tests:
• Delivery of the full equipment for the model cavitation tests
• Delivery of the additions needed for the on-site cavitation tests
• Alternatively, for both: Delivery of the full application software & the detailed specifications of the hardware
• Instruction documentation, schooling
• Assistence at the installation
• Introductory assistence at the interpretation of the tests results
• Remote support
For the 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: Licence for the use of the patented solution
Korto Cavitation Services
