Turbomachinery: Impulse & Reaction Turbines
Not what you're looking for?
Question 4: An impulse air turbine has a total (on static) inlet pressure and temperature of 11,25 bar, 600 degrees K and exhausts to the atmosphere at 0.91 bar. The nozzle efficiency is 87% and its exit angle is 71 degrees. The rotor efficiency is 65%. If the blade speed if 190 m/s at the mean radius of 12cm, calculate the power output for full admission to the 2cm long rotor blades.
Question 5: It has been decided to use the following velocity diagrams for a STEAM reaction turbine stage which is expected to have a nozzle and rotor efficiency of 80% when the stage inlet total ((not static) pressure and temperature are 17 bar, 400 degrees C. Using the small segment of the enthalpy-entropy chart for steam that is suppled, plot the hs diagram for the nozzle and rotor and hence determine the outlet pressures of each.
Question 6: It has been decided to use the following velocities for a reaction turbine stage which is expected to have a nozzle efficiency of 90% and a rotor efficiency of 85% when the stage inlet total (not static) pressure and temperature are 5 bar, 1050 K. Calculate the as yet known velocities and then determine the specific work output and the outlet pressure from the rotor.
Purchase this Solution
Solution Summary
THis solution includes complete step-by-step calculations and answers. The explanation is 683 words. Illustrations are used for the geometry of the velocities for (1) through (3) and the thermodynamic analysis for (1) and (2).
Solution Preview
Notations and assumptions:
[ ]* = total features (like p*, T*)
cp = specific heat at constant pressure (for air at low temperatures we will take cp ...
Purchase this Solution
Free BrainMass Quizzes
The Moon
Test your knowledge of moon phases and movement.
Classical Mechanics
This quiz is designed to test and improve your knowledge on Classical Mechanics.
Intro to the Physics Waves
Some short-answer questions involving the basic vocabulary of string, sound, and water waves.
Basic Physics
This quiz will test your knowledge about basic Physics.
Introduction to Nanotechnology/Nanomaterials
This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.