Supersonic refrigeration performances of nozzles and phase transition characteristics of wet natural gas considering shock wave effects
Laval nozzle is the critical part of supersonic separator to provide refrigeration environment. Due to the back pressure at the outlet of supersonic separator in dehydration process, the condensation characteristics of water vapor and the refrigeration performances of the nozzles are affected by the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-04-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X2030575X |
| _version_ | 1819141406531256320 |
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| author | Xuewen Cao Yang Liu Xuerui Zang Dan Guo Jiang Bian |
| author_facet | Xuewen Cao Yang Liu Xuerui Zang Dan Guo Jiang Bian |
| author_sort | Xuewen Cao |
| collection | DOAJ |
| description | Laval nozzle is the critical part of supersonic separator to provide refrigeration environment. Due to the back pressure at the outlet of supersonic separator in dehydration process, the condensation characteristics of water vapor and the refrigeration performances of the nozzles are affected by the shock wave. Herein, mathematical models for the supersonic condensation and flow of the methane-water two-phase flow model were established, which were verified by the experimental data. The effects of different divergent angles on the refrigeration and condensation behavior in the Laval nozzle were studied considering shock wave. The results show that the refrigeration performance of the nozzle will be worsen under the presence of shock waves. With the divergent angle of the nozzle increased from 2° to 8°, the lowest temperature was decreased from 304.4 K to 291.8 K, the liquid mass fraction at the nozzle outlet was decreased from 0.84% to 0.133%, the maximum droplet radius that can be obtained was reduced from 2.54 × 10−7 m to 1.69 × 10−7 m due to the forward movements of the shock waves. The divergent angle of the nozzle is recommended to be designed to 4°–6° in consideration of the refrigeration performance. |
| first_indexed | 2024-12-22T11:53:57Z |
| format | Article |
| id | doaj.art-fafa051e73864941ba1b01c042bba835 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-22T11:53:57Z |
| publishDate | 2021-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-fafa051e73864941ba1b01c042bba8352022-12-21T18:26:54ZengElsevierCase Studies in Thermal Engineering2214-157X2021-04-0124100833Supersonic refrigeration performances of nozzles and phase transition characteristics of wet natural gas considering shock wave effectsXuewen Cao0Yang Liu1Xuerui Zang2Dan Guo3Jiang Bian4College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580, China; Shandong Provincial Key Laboratory of Oil and Gas Storage and Transportation Safety, Qingdao, 266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580, China; Shandong Provincial Key Laboratory of Oil and Gas Storage and Transportation Safety, Qingdao, 266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580, China; Shandong Provincial Key Laboratory of Oil and Gas Storage and Transportation Safety, Qingdao, 266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580, China; Shandong Provincial Key Laboratory of Oil and Gas Storage and Transportation Safety, Qingdao, 266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580, China; Shandong Provincial Key Laboratory of Oil and Gas Storage and Transportation Safety, Qingdao, 266580, China; Corresponding author. College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, 266580, China.Laval nozzle is the critical part of supersonic separator to provide refrigeration environment. Due to the back pressure at the outlet of supersonic separator in dehydration process, the condensation characteristics of water vapor and the refrigeration performances of the nozzles are affected by the shock wave. Herein, mathematical models for the supersonic condensation and flow of the methane-water two-phase flow model were established, which were verified by the experimental data. The effects of different divergent angles on the refrigeration and condensation behavior in the Laval nozzle were studied considering shock wave. The results show that the refrigeration performance of the nozzle will be worsen under the presence of shock waves. With the divergent angle of the nozzle increased from 2° to 8°, the lowest temperature was decreased from 304.4 K to 291.8 K, the liquid mass fraction at the nozzle outlet was decreased from 0.84% to 0.133%, the maximum droplet radius that can be obtained was reduced from 2.54 × 10−7 m to 1.69 × 10−7 m due to the forward movements of the shock waves. The divergent angle of the nozzle is recommended to be designed to 4°–6° in consideration of the refrigeration performance.http://www.sciencedirect.com/science/article/pii/S2214157X2030575XLaval nozzleSupersonic condensationRefrigerationDivergent anglesShock wave |
| spellingShingle | Xuewen Cao Yang Liu Xuerui Zang Dan Guo Jiang Bian Supersonic refrigeration performances of nozzles and phase transition characteristics of wet natural gas considering shock wave effects Case Studies in Thermal Engineering Laval nozzle Supersonic condensation Refrigeration Divergent angles Shock wave |
| title | Supersonic refrigeration performances of nozzles and phase transition characteristics of wet natural gas considering shock wave effects |
| title_full | Supersonic refrigeration performances of nozzles and phase transition characteristics of wet natural gas considering shock wave effects |
| title_fullStr | Supersonic refrigeration performances of nozzles and phase transition characteristics of wet natural gas considering shock wave effects |
| title_full_unstemmed | Supersonic refrigeration performances of nozzles and phase transition characteristics of wet natural gas considering shock wave effects |
| title_short | Supersonic refrigeration performances of nozzles and phase transition characteristics of wet natural gas considering shock wave effects |
| title_sort | supersonic refrigeration performances of nozzles and phase transition characteristics of wet natural gas considering shock wave effects |
| topic | Laval nozzle Supersonic condensation Refrigeration Divergent angles Shock wave |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X2030575X |
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