3.11) The conditions of air at the entry of an axial compressor stage are: P1 = 768 mm Hg & T, = 314 K. The air angles are B1 = 51°, B2 = 9°, a1 = az = 7°. The mean diameter 50 cm. The peripheral speed 100 m/s. Mass-flow rate 25 kg/s work done factor 0.95 mechanical efficiency 92 % stage efficiency 88 % (a) Air angle at the stator entry, [a2 = 50.18°] %3D (b) Blade height at entry and the hub-tip diameter ratio, [h, = 19 cm; dn/dt = 0.449] %3D (c) Stage loading coefficient. [V = 0.754] %3D

3.11) The conditions of air at the entry of an axial compressor stage are: P1 = 768 mm Hg & T, = 314 K. The air angles are B1 = 51°, B2 = 9°, a1 = az = 7°. The mean diameter 50 cm. The peripheral speed 100 m/s. Mass-flow rate 25 kg/s work done factor 0.95 mechanical efficiency 92 % stage efficiency 88 % (a) Air angle at the stator entry, [a2 = 50.18°] %3D (b) Blade height at entry and the hub-tip diameter ratio, [h, = 19 cm; dn/dt = 0.449] %3D (c) Stage loading coefficient. [V = 0.754] %3D

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Single stage, single-acting air compressor. Air delivery for this device is 30 bar at a speed of 1500 rev/min. The atmospheric condition of his location is 87 kPa and 20 ˚C, with a FAD of 0.22 m2/min. The clearance volume is 4% of the swept volume and the stoke/bore ratio is 1.3/1. Take “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg KW 1.What is the isothermal power of the compressor in kW to 2 decimal places in kW? 2. which formula will be used to evaluate the isothermal efficiency? 3. which formula will be used to evaluate the delivery volume? 4. What is the induced volume in terms of stroke volume, provide the coefficient values of the swept volume to 4 decimal places?
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