Question

C) Axial-flow compressor Answer 3) Specifie speed (0.) for the compressor compressor should selected? application is 0.9. Which of the following type of 52 th Reciprocating compressor B) none of these A) Centrifug al compressor 1,) compressor D) Centrifugal fan 6) &7) The compressor is tested at sea level on a stationary atmospheric temperature and pressure is design operating point, the mass flow rate through the compr rotational speed is 7000 rpm. Determine the flow compressor is operating at the design operating point during high aln and 100 kPa, respectively, When running at its the mass flow rate and rotational speed when the pressure of 10 kPa. is measured as 20 kg/s and the ho stagnation temperature of 240 K and an inlet stagnation pre Mass flow rate at the design operating point: A) 2.236 kg/s E) 0.0556 kg/s B) 1.145 kg/s D) 0.556 kg/s C) 5.560 kg/s Answer Rotational speed design operating point A) 3265 rpm B) 6589 rpm C) 5879 rpm D) 6260 rpm E) 7878 rpm Answer 8) Steam pressure at the entry of steam turbine is 5000 psi. Once steam passes nozzle, it is ced to 4000 psi. At rotor outlet, it is further reduced to 3000 psi. Calculate the stage reaction for the first stage B) 0.125 C) 0.25 D) 0.375 E) 0.5 Answer 9) For a gas turbine- the rotor blade tip radius is 0.4 m, the blade height is 0.13 m, and the shaft speed is 10,000 rev/min. Calculate the rotor blade root stress assuming the blade is tapere with a stress taper factor K of 2/3 and the blade material density is 8100 kg/m A) 251.45 MPa B) 248.67 MPa C) 245.45 MPa ) 261.12 MPa E) 257.89 MPa Answer

Answer 1

pectic speed or the compressor applicate 0.9、 Reciprocating compressor .option