Engineering, 08.11.2019 20:31 brooklyn674

Aturbine rotor is designed with a free vortex distribution for both the inlet and exit flow. station 1 is the rotor inlet and station 2 is the rotor exit. the blade height is 100 mm, and the hub radius is 200 mm. the inlet conditions at the hub are: α1h = 70°, u1h = 200 m/s, and v1h = 450 m/s. the specific work extracted on the mean streamline is 100 kj/kg. simple stage assumptions apply.

find:

a) calculate the hub, meanline (50% span), and tip velocity triangles at the inlet of the rotor using an isre analysis. provide a sketch of the velocity triangles and a table of all velocities (u, v, and w) and angles (α and β).
b) calculate the hub, meanline (50% span), and tip velocity triangles at the exit of the rotor. provide a sketch of the velocity triangles and a table of all velocities (u, v, and w) and angles (α and β).
c) calculate the degree of reaction at the hub, meanline, and tip using the simple stage expression for the degree of reaction in a turbine stage: where the sign convention for the angles is given as ‘positive in the direction of rotor rotation’.
d) where does the lowest degree of reaction occur? what is a reasonable limit for the minimum degree of reaction in a turbine? why?

Answers: 3

Show answers

Another question on Engineering

Engineering, 03.07.2019 14:10

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Answers: 3

Answer

Engineering, 03.07.2019 19:30

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Answers: 3

Answer

Engineering, 04.07.2019 18:10

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Fluids at rest possess no flow energy. a)- true b)- false

Answers: 3

Answer

You know the right answer?

Aturbine rotor is designed with a free vortex distribution for both the inlet and exit flow. station...