Entropy Generation in the Supersonic Convergent-Divergent Nozzle
Publish place: The 31st annual conference between Iran Mechanical Engineering and the 9th Iran Power Plant Industry Conference
Publish Year: 1402
Type: Conference paper
Language: English
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Document National Code:
ISME31_099
Index date: 31 May 2023
Entropy Generation in the Supersonic Convergent-Divergent Nozzle abstract
The supersonic separator, which is a converging-diverging nozzle, is an advanced separation technology focusing on water vapor removal. The complex nature of the two-phase flow along with the change of the flow regime from subsonic to supersonic along with extreme temperature and pressure changes make the analysis complicated. This research was done to investigate the entropy generation due to temperature and pressure changes in these types of separators. The density-based solver, the realizable k-Ɛ turbulence model, and the virial gas equation of state are used. The pressure distribution and droplet average radius obtained from the numerical model are well consistent with the experimental data. By increasing the temperature from 662.45 K to 686.43 K at a constant pressure of 13.83 MPa, the total entropy generation rate increased by 9.75%; By increasing the pressure from 9.83 MPa to 13.83 MPa at a constant temperature of 674.42 K, the total entropy generation rate increased by 15.95%. Also, The Bejan number calculation showed that irreversibility is affected by the effects of fluid friction compared to heat transfer.
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Entropy Generation in the Supersonic Convergent-Divergent Nozzle authors
Soroush Yousefi
Department of Mechanical Engineering, Faculty of Mechanical Engineering, Iran University of Science and Technology,Tehran, Iran;