Abstract
In this paper, we studied the impulse turbine of a power station based on the ultrasonic flow measurement method. Efficiency tests were carried out on the nozzle head, nozzle needle and deflector disc spring of the unit before and after the transformation. The results showed that the absolute efficiency of the unit before and after the transformation was basically the same. The efficiency value and economic performance have been improved to a certain extent, and the results obtained by using the ultrasonic method to carry out the unit efficiency test are correct and credible.
Highlights
As one of the basic test tasks of the Hydropower unit, the efficiency test of the turbine is an effective method to directly understand the running state of the turbine and master the basic power characteristics of the unit
An impulse hydropower unit was used as an example to compare and analyze the efficiency test before and after the modification of the nozzle head, the nozzle needle and the deflector disc spring of the unit using the ultrasonic flow measurement method
The results showed that the absolute efficiency change trend before and after the transformation was basically the same, and the efficiency value was improved to a certain extent after the transformation
Summary
As one of the basic test tasks of the Hydropower unit, the efficiency test of the turbine is an effective method to directly understand the running state of the turbine and master the basic power characteristics of the unit. The ultrasonic flow measurement method can be used when measuring the flow in the efficiency test, which has the advantages of strong anti-interference ability and continuous tube installation by using the characteristics of ultrasonic[1,2]. An impulse hydropower unit was used as an example to compare and analyze the efficiency test before and after the modification of the nozzle head, the nozzle needle and the deflector disc spring of the unit using the ultrasonic flow measurement method
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