Thermodynamic and aerodynamic meanline analysis of wet compression in a centrifugal compressor

Kang, Jeong-Seek; Cha, Bong-Jun; Yang, Sungwook

doi:10.1007/bf02915970

Cited by 6 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the compression process changes due to droplets inside the compressor, and the flow angle changes. If the flow angle at the outlet of the impeller is largely changed, abnormal phenomena, such as a stall and surge, may occur along with the deterioration of the compressor performance, making it difficult to operate the compressor [12].…”

Section: Introductionmentioning

confidence: 99%

Wet Compression Study for an Aero-Thermodynamic Performance Analysis of a Centrifugal Compressor at Design and Off-Design Points

Kang

Kim

2022

Processes

View full text Add to dashboard Cite

In this study, to analyze the effect of wet compression technology on the aero-thermodynamic performance of a centrifugal compressor, a numerical analysis study was conducted on the design point and off-design point. Wet compression technology sprays water droplets at the inlet of the compressor. During the compression process, water droplets evaporate, reducing the heat of compression and reducing the compression work, which improves the efficiency of the compressor. In wet compression technology, detailed research is needed for the application to compressors because the droplet behavior affects the internal flow. The main parameters for wet compression technology are the droplet size and injection rate selection, and the flow inside the compressor changed by the droplet behavior was analyzed. When the droplet size and injection rate were changed at the design point and the off-design point, it was confirmed that a small droplet size was effective in both areas, and it was confirmed that the performance improved as the flow rate increased. The internal flow changed greatly depending on the size of the droplet. As a result, the centrifugal compressor to which the wet compression technology was applied had a lower outlet temperature than dry compression at both the design point and the off-design point and had increases in the pressure ratio and efficiency. However, the surge margin decreased by about 2% in the surge region. The reason is that due to high-speed rotation, particles move in the outer diameter direction and are driven into a tip-leakage flow, and many stagnant flows occur without flowing into the main flow. Through the study results, it was possible to understand the effects of wet compression technology on the performance and efficiency increase of centrifugal compressors and the effects of particle behavior on the internal flow of the compressor at the off-design point.

show abstract

Section: Introductionmentioning

confidence: 99%

Wet Compression Study for an Aero-Thermodynamic Performance Analysis of a Centrifugal Compressor at Design and Off-Design Points

Kang

Kim

2022

Processes

View full text Add to dashboard Cite

show abstract

“…Work to date has focused primarily on GT engine applications and has predominantly employed the quasi-steady approach; examples can be found in Refs. [31][32][33][34][35][36][37][38]. In these integrated models the droplets have been assumed to be uniform in temperature and composition, and the far-field (''mean-line") gas-phase temperature has been modeled as homogeneous but unsteady.…”

Section: Introductionmentioning

confidence: 99%