Question

For isentropic flows the value of work-done factor for a turbo machine (\(\Psi\)) will be

• A. \(\Psi = 0\)
• B. \(\Psi = 1\)
• C. \(\Psi>:1\)
• D. \(\Psi<:1\)

Hint:

In practical scenarios, achieving \(\Psi = 1\) is ideal but often not possible due to inherent inefficiencies and losses.

Answer 1

The Correct Option is B

Step 1: Define Work-Done Factor.
The work-done factor, \(\Psi\), in turbo machinery is a dimensionless parameter that indicates the ratio of actual work done to the ideal work possible in an isentropic process.
Step 2: Analysis for Isentropic Flow.
In a truly isentropic process within a turbo machine, where there are no losses and the process is reversible, the actual work equals the ideal work, hence \(\Psi = 1\).