Question

Use the following test results to estimate the overall isentropic efficiency of a single-sided centrifugal compressor with ambient condition Pa-100 kPa, Ta-300 K. Operating parameter: at the compressor exit Po3-300 kPa, To3-420K, static pressure at the impeller tip P,-200 kPa, mass flow rate 1 kg/s, rotation speed 720 rev/s, γ=1.4, and C,-1 k /(kg K) Geometric properties: impeller diameter 15 cm, number of impeller vanes (n) is 16 while noting that G-1-(0.63T/n), the vane diffuser channel has a channel height (H) of 1 cm (circumferential area (a) Estimate the overall isentropic efficiency (impeller + diffuser). (b) Estimate the power input factor w. (c) Estimate the total velocity leaving the impeller tip V2. (d) Estimate the temperature (T2) at the impeller tip. (e) Determine the impeller efficiency.

Answer 1

In this solution some basic concepts and formulas of Turbo-Machinery are used. For more information, refer to any standard textbook or drop a comment below. Please give a Thumbs Up, if solution is helpful.

Solution :

o s 12 T d T3-T T2-T maan value if you -4nd it - separately-ouinsen hone

ddotu 乙, 339:39 m hw Vn u" ケ U2 uge 425-655

rem en d, -h 3

2 7,マ315-35 . u sa T-T

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