Engineering

Mechanical EngineeringQ&A LibraryQUESTION 3A high-pressure axial compressor for astagnation pressure ratio of 8.5. The mass flow rate of air through the compressor is 16 kg/sand the stagnation conditions at inlet are 200 kPa and 450 K. The polytropic efficiency is 91 %.jet engine rotates at 15,000 rpm with and overall(a) If the mean radius is 0.24 m and this is constant throughout the compressor, calculatethe total-to-total isentropic efficiency of the compressor and show that, for the stageloading to be less than 0.4 in all stages, eight stagesrequired.are(b) The compressor is designed with repeating stages and zero inlet swirl. If the inlet axialMach number is 0.52, calculate the mean flow coefficient and sketch the velocitytriangles for one stage. Show that the blade height at exit from the compressor is about7.8 mm.Question

Asked Jul 17, 2019

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Step 1

Write the expression for stagnation pressure ratio.

Step 2

Obtain the change in stagnation temperature.

Step 3

Obtain the blade veloci...

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