Effects of fluid properties on the aerodynamic performance of turbomachinery for semi-closed cycle gas turbine engines using O2/CO2 combustion

Roberts, S. K.

doi:10.22215/etd/2002-05052

Cited by 4 publications

(32 citation statements)

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“…Aungier (2000) and Dixon (1998) The external losses outlined above are further discussed and defined in section 3.1.6. The set of loss models described by Oh et al (1997) was used successfully by Roberts (2001) to predict the off-design behaviour of centrifugal compressors.…”

Section: One-dimensional Loss Modelsmentioning

confidence: 99%

Development of performance estimation tool for gas turbine engine centrifugal compressors

Britton¹

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Section: One-dimensional Loss Modelsmentioning

confidence: 99%

Development of performance estimation tool for gas turbine engine centrifugal compressors

Britton¹

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“…Until the work of Roberts (2001), there appeared to be no information available in the literature which quantified the effect of the isentropic exponent on turbomachinery performance. Roberts (2001) investigated the performance of a centrifugal compressor in alternative working fluids using experimental data, computational and theoretical analysis. Roberts (2001) concluded that differences in the isentropic exponent do significantly influence the compressor performance.…”

Section: Pr = ^-(218)mentioning

confidence: 99%

“…Roberts (2001) investigated the performance of a centrifugal compressor in alternative working fluids using experimental data, computational and theoretical analysis. Roberts (2001) concluded that differences in the isentropic exponent do significantly influence the compressor performance. He also derived correlations to predict the performance of a turbomachine in an alternative working fluid based on the known performance in another fluid.…”

Section: Pr = ^-(218)mentioning

confidence: 99%

“…He also derived correlations to predict the performance of a turbomachine in an alternative working fluid based on the known performance in another fluid. The correlations developed by Roberts (2001) predict the effect of variation in the isentropic exponent on the non-dimensional mass flow parameter at choking (H* m ), the total pressure ratio (P 02 /P 0 i) an^ isentropic efficiency (rf) for gas B from the same performance parameters in gas A for given values of the non-dimensional speed and mass flow parameter as follows:…”

Section: Pr = ^-(218)mentioning

confidence: 99%

“…2.23 also neglects the effect of efficiency on the pressure ratio due to the change in working fluid. Roberts (2001) suggested that the pressure ratio of gas B predicted from the pressure ratio of gas A when accounting for the change in efficiency between gas A and B takes the form of Eqn. 2.25.…”

Section: Isentropic Efficiencymentioning

confidence: 99%

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Experimental and numerical investigation of centrifugal compressors for use with alternative working fluids

Elia¹

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Aerodynamic analysis of a highly loaded compressor in semi‐closed cycles using a throughflow method

Song

2015

Greenhouse Gases

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This paper outlines the aerodynamic performance of a highly loaded 5‐stage compressor in a conceptual semi‐closed cycle. An in‐house throughflow computation procedure that has been proven to be a powerful tool in aerodynamic analysis for modern compressors is applied to simulate the compressor. The influences of changes in physical properties of the working medium with varying ratios of exhaust CO2 recirculation are considered in the computation. A series of numerical simulations is conducted with two settings depending on whether the rotational speed is set to obey the criterion of similarity. For the identical non‐dimensional speed parameter, the compressor can operate stably with pure CO2 as the working fluid. The distributions of aerodynamic parameters undergo no big differences under various CO2 contents; however, a somewhat little higher loss is observed for the 5th stage. When the absolute rotational speed is set according to the originally designed value, the compressor can bear a 25% CO2 content at the cost of a substantially narrowed working range, and a recirculation ratio of approximately 10% is a safe threshold value. The aerodynamic configuration also undergoes a notable redistribution given these circumstances; the load of the front stages is reduced, but the rear stages become the risk factors at near stall condition. This research reveals that from the compressor design point of view, a semi‐closed cycle is feasible using existing technology and that compressor modifications are needed according to situational requirements. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd

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Effects of fluid properties on the aerodynamic performance of turbomachinery for semi-closed cycle gas turbine engines using O2/CO2 combustion

Cited by 4 publications

References 0 publications

Development of performance estimation tool for gas turbine engine centrifugal compressors

Development of performance estimation tool for gas turbine engine centrifugal compressors

Experimental and numerical investigation of centrifugal compressors for use with alternative working fluids

Aerodynamic analysis of a highly loaded compressor in semi‐closed cycles using a throughflow method

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