Examples of Steam Flow through Nozzles — Lesson 6

This lesson covers the concept of steam flow through nozzles, with a focus on examples involving the flow of steam. It explains how to determine the exit pressure, exit velocity, and the mass flow rate. The lesson also discusses the specific volume of the stagnation state, the index of expansion, and the evaluation of the sonic state. It further elaborates on the concept of choked flow and subsonic flow. The lesson concludes with a detailed analysis of different examples, demonstrating how to calculate the throat diameter, exit diameter, and dryness fraction at the exit.

Video Highlights

01:03 - Explanation of index of expansion
03:30 - Different methods of analysis using steam tables or TS diagram
06:28 - Explanation of choked nozzle and calculation of exit velocity and mass flow rate
09:50 - Determination of velocity at the inlet and the exit and the stagnation pressure
13:32 - Determination of whether the nozzle is convergent or convergent divergent

Key Takeaways

- The flow of steam through a nozzle can be calculated using the given pressure and temperature, along with the nozzle's throat area.
- The concept of 'choked flow' is crucial in determining the flow rate and velocity of steam through a nozzle.
- The index of expansion and the stagnation state play significant roles in these calculations.
- Steam tables and the Moliere chart can be used for these calculations, making the process more straightforward and accurate.