Question

Question 3 Consider an axial compressor with blades installed at given angle with respect to incoming airflow The ccmpressor has diameter of 1.0 m and rotates at 3000 rpm. Air mass flow rate through compre sso is 110 kg/s. Pressure and temperature of air at the inlet of the compressor are 1 atm and 300K. Compressor blades are installed at 50° with respect to the axial plane. Conclude whether this compressor can operate at the designed speed of 3000 rpm. Note that specific gas constant for air is 287 J/kgK. Also note that there are no inlet guide vanes. Draw velocity diagram and show relevant angles

Answer 1

Velocity Triangles Two-Dimensional Approach: U: Tangential blade speed C: Absolute flow velocitv CQ: Axial component of C Cy: whirl or tangential 2x C, Rotor component of C V: Relative flow velocity α : Absolute flow angle B: Relative flow Angle C. u2 stator

U60 10132S 11g Is,l y) I19

uJ Speed 3000