Use of partially shrouded impeller in a small centrifugal compressor

Tang, Jianjun; Turunen-Saaresti, Teemu; Larjola, Jaakko

doi:10.1007/s11630-008-0021-1

Cited by 7 publications

(5 citation statements)

References 21 publications

(20 reference statements)

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“…Ishida et al [4] had tested centrifugal blowers with different shapes (square, round, and E-type, i.e., with an extension on the pressure surface side) and found that E-type tip provided improved performance. The concept of partial shrouded rotor in a small high-speed high-pressure ratio centrifugal compressor was computationally investigated by Tang et al [5]. They found that the leakage flow was reduced in the partially shrouded rotor.…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of a Centrifugal Compressor by Passive Means

Sitaram

Swamy

2012

International Journal of Rotating Machinery

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The present experimental investigation deals with performance improvement of a low-speed centrifugal compressor by inexpensive passive means such as turbulence generator placed at different positions and partial shroud near the rotor blade tip. The experiments are carried out at three values of tip clearance, namely 2.2%, 5.1%, and 7.9% of rotor blade height at the exit. Performance tests are carried out for a total of 13 configurations. From these measurements, partial shroud is found to give the best performance. The improvement in the compressor performance may be due to the reduction of tip leakage flows by the small extension of partial shroud (2 mm on the pressure surface side). Although there is nominal change in performance due to turbulence generator (TG), TG has beneficial effect of increased operating range.

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Section: Introductionmentioning

confidence: 99%

Performance Improvement of a Centrifugal Compressor by Passive Means

Sitaram

Swamy

2012

International Journal of Rotating Machinery

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“…With more advanced manufacturing methods, such as 3D printing, the implementation of splitter blades has become an option for closed impellers. Other impeller range-extension concepts that could be realized through direct metal laser sintering (DMLS) are partially shrouded impellers [14].…”

Section: Range Extension Concept Overviewmentioning

confidence: 99%

Design of a Wide-Range Centrifugal Compressor Stage for Supercritical CO2 Power Cycles

Pelton¹,

Allison²,

Jung

et al. 2018

Journal of Engineering for Gas Turbines and Power

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Supercritical carbon dioxide (sCO2) power cycles require high compressor efficiency at both the design point and over a wide operating range. Increasing the compressor efficiency and range helps maximize the power output of the cycle and allows operation over a broader range of transient and part-load operating conditions. For sCO2 cycles operating with compressor inlets near the critical point, large variations in fluid properties are possible with small changes in temperature or pressure. This leads to particular challenges for air-cooled cycles where compressor inlet temperature and associated fluid density are subject to daily and seasonal variations as well as transient events. Design and off-design operating requirements for a wide-range compressor impeller are presented where the impeller is implemented on an integrally geared compressor–expander concept for a high temperature sCO2 recompression cycle. In order to satisfy the range and efficiency requirements of the cycle, a novel compressor stage design incorporating a semi-open impeller concept with a passive recirculating casing treatment is presented that mitigates inducer stall and extends the low flow operating range. The stage design also incorporates splitter blades and a vaneless diffuser to maximize efficiency and operating range. These advanced impeller design features are enabled through the use of direct metal laser sintering (DMLS) manufacturing. The resulting design increases the range from 45% to 73% relative to a conventional closed impeller design while maintaining high design point efficiency.

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“…Tang et al, [6] studied numerically a 3D impeller and vaneless diffuser of a small centrifugal compressor. The influence of impeller tip clearance on the flow field of the impeller was investigated.…”

Section: Previous Workmentioning

confidence: 99%

A Numerical/Experimental Study of a Multi-Stage Centrifugal Compressor

Mostafa

Abdulagawad

Emeara

2011

The Egyptian International Journal of Engineering Sciences and

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Both computational and experimental investigations were utilized to study the flow behavior inside the four-stage centrifugal compressor. Computational study was carried out by the commercial code "CFD-RC". Experimental work was accomplished by the use of a data acquisition system, advanced sensors and "LabView" interface software. Comparisons between computational and experimental outputs were performed.The computational code was validated experimentally and numerically. Compressor map was drawn numerically and experimentally. Surge was unsteadily simulated. Surge predicted at mass flow equal to 0.0093 kg/s for 12,000 rpm with full-domain solution. Using the parallel computational technology, by "HPC" program, is recommended for future work.

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Use of partially shrouded impeller in a small centrifugal compressor

Cited by 7 publications

References 21 publications

Performance Improvement of a Centrifugal Compressor by Passive Means

Performance Improvement of a Centrifugal Compressor by Passive Means

Design of a Wide-Range Centrifugal Compressor Stage for Supercritical CO2 Power Cycles

A Numerical/Experimental Study of a Multi-Stage Centrifugal Compressor

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