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What does the operating characteristic curve of a turbine mean?

By BYJU'S Exam Prep

Updated on: October 17th, 2023

(a) Curve drawn at constant head

(b) Curve drawn at constant efficiency

(c) Curve drawn at constant speed

(d) Curve drawn at constant load

The operating characteristic curve of a turbine means a curve drawn at a constant speed. The curves that make up a hydraulic turbine’s characteristic curves can be used to determine the turbine’s precise behaviour and performance under various operating situations. 

Operating Characteristic Curve of a Turbine

  • Main characteristic curve: The test on the turbine is conducted while maintaining a constant head at a constant gate opening, and the speed is modified by altering the load on the turbine in order to get these curves.
  • Constant efficiency curve: These curves are plotted at constant efficiency.
  • Operating characteristic curve: The test on the turbine is carried out by operating them at a constant speed in order to get these curves. Additionally called the Constant Speed Curve. The head might or might not stay the same.

Summary:

What does the operating characteristic curve of a turbine mean? (a) Curve drawn at constant head (b) Curve drawn at constant efficiency (c) Curve drawn at constant speed (d) Curve drawn at constant load

The turbine’s operating characteristic curve refers to the curve drawn at a constant speed. These curves were created using the data from the tests the turbine underwent while operating in various environments.

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