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Category > Applied Sciences Posted 09 May 2017 My Price 5.00

The air entering the impeller of a centrifugal compressor

The air entering the impeller of a centrifugal compressor has an absolute axial velocity of
100m/s. At rotor exit the relative air angle measured from the radial direction is 26°36¢, the
radial component of velocity is 120 m/s and the tip speed of the radial vanes is 500 m/s. Determine
the power required to drive the compressor when the air flow rate is 2.5 kg/s and the mechanical
efficiency is 95%. If the radius ratio of the impeller eye is 0.3, calculate a suitable inlet diameter
assuming the inlet flow is incompressible. Determine the overall total pressure ratio of the
compressor when the total-to-total efficiency is 80%, assuming the velocity at exit from the diffuser
is negligible.

Answers

Alpha Geek
(8)
Status NEW Posted 09 May 2017 10:05 AM My Price 5.00

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file 1494325336-Answer.docx preview (155 words )
T-----------he -----------air----------- en-----------ter-----------ing----------- th-----------e i-----------mpe-----------lle-----------r o-----------f a----------- ce-----------ntr-----------ifu-----------gal----------- co-----------mpr-----------ess-----------or -----------has----------- an----------- ab-----------sol-----------ute----------- ax-----------ial----------- ve-----------loc-----------ity----------- of-----------100-----------m/s-----------. A-----------t r-----------oto-----------r e-----------xit----------- th-----------e r-----------ela-----------tiv-----------e a-----------ir -----------ang-----------le -----------mea-----------sur-----------ed -----------fro-----------m t-----------he -----------rad-----------ial----------- di-----------rec-----------tio-----------n i-----------s 2-----------6°-----------36Â-----------¢, -----------the-----------rad-----------ial----------- co-----------mpo-----------nen-----------t o-----------f v-----------elo-----------cit-----------y i-----------s 1-----------20 -----------m/s----------- an-----------d t-----------he -----------tip----------- sp-----------eed----------- of----------- th-----------e r-----------adi-----------al -----------van-----------es -----------is -----------500----------- m/-----------s. -----------Det-----------erm-----------ine-----------the----------- po-----------wer----------- re-----------qui-----------red----------- to----------- dr-----------ive----------- th-----------e c-----------omp-----------res-----------sor----------- wh-----------en -----------the----------- ai-----------r f-----------low----------- ra-----------te -----------is -----------2.5----------- kg-----------/s -----------and----------- th-----------e m-----------ech-----------ani-----------cal-----------eff-----------ici-----------enc-----------y i-----------s 9-----------5%.----------- If----------- th-----------e r-----------adi-----------us -----------rat-----------io -----------of -----------the-----------
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