QUESTION 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.

Write the expression for stagnation pressure ratio.

Answered: QUESTION 3 A high-pressure axial…

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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b) A single-acting, two-stage reciprocating air compressor runs at a speed of 500 rev/min with overall pressure ratio of 20 to 1 has free air delivery of 5.0 m3/min. For the first stage compressor, the pressure and temperature at the end of induction stroke is 100kPa and 27°C, respectively. The intermediate pressure is 500 kPa, and the intercooling process is complete. The clearance volumes of both stages are 5% of their respective swept volumes. The ambient pressure and temperature are at 100 kPa and 27°C, respectively. The index of compression and expansion, n is 1.3. i) Sketch the cycle on a P-V diagram. ii) Determine final delivery temperature of the compressor, C. iii) Determine totalindicated power, kw. iv) Determine volumetric efficiency for the first stage, %. v) Calculate the swept volume of the first and second stage, m2. Take the value of R for air is 0.287 kl/kg.K.
Ata particular stage of a reaction turbine the mean blade speed is 140 nı/sec and the steam is at a pressure of 20 bar with temperature of 250° C. Fixed and moving blades at this stage haye inlet angles 30° and exit angles 20°. The stage efficiency is 80%. Determine (i) Specific entholpy drop across the stage in kJ/kg. (ti) Drum Dia and blade height if heigh is one-twelfth of the drum dia. and the steam flow is 120 kg/sec.
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Q3// An axial flow compressor, with compression ratio as 5, draws air at 20°C delivers it at 50°C. Assuming 50% degree of reaction, find the velocity of flow if the blade velocity is 100 m/s. Also find the number of stages. Take work factor-0.85, the exit and inlet angles for both the moving and fixed blades are 10° and 40° respectively, c₁=1 kJ/kg.K.
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Consider a reciprocating air compressor with two-stage, 6.8 m³/min free air delivery at atmospheric conditions of 125 kPa and 18 °C, respectively. The polytropic compression index is 1.28, while the delivery pressure is 1,706 kPa. The mechanical and motor-drive efficiencies are 85% and 93%, respectively. Accept complete inter-cooling and neglect clearance volumes. What is the intermediate pressure in kPa to 1 decimal place? Ciel Saue and Suhmit to and ub mit Cial Saua A 77 A
مراد جبار فرحان In a gas turbine engine (A, = 2.85 A2, p1 = 1.14 p2, p1 = 100.5 kPa, T, = 11 °C, v1 = 107 m-s1, V2 = 785 m-s", A, = 2.4 m?), calculate the thrust force. %3D %3D ===
an air compressor of three stage compresses air from 100 kpa to 1000 kpa. calculate the intercooler pressure between the first and second stage
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