Infrared and Laser Engineering, Volume. 54, Issue 6, 20250016(2025)
Study on the similarity of infrared radiative characteristics of ship exhaust plumes
Figures & Tables(14)
Fig. 1. Schematic diagram of radiative transfer in a one-dimensional gaseous medium
Fig. 4. Schematic diagram of the calculation area for the stack exhaust system
Fig. 5. Exhaust gas temperature and gas Mole fraction distribution of Case 1
Fig. 6. Temperature distribution in the centerline of the stack exhaust system
Fig. 7. Distribution of H2O Mole fraction at the centreline of the stack exhaust system
Fig. 8. Distribution of CO2 Mole fraction at the centreline of the stack exhaust system
Fig. 10. Spectral radiative intensity for cases with the same optical thickness
Fig. 11. Spectral radiative intensity for cases with the same gas Mole fraction
Table 1. Comparisons of spectrally integral radiative intensity in one-dimensional media
View tableView in ArticleTable 1. Comparisons of spectrally integral radiative intensity in one-dimensional media
High temperature layer Low temperature layer Spectrally integral radiative intensity/W·m–2·sr–1 Relative deviation Temperature/K Gas Mole fraction Length/m Temperature/K Gas Mole fraction Length/m Single layer 1 500 0.03 4 - - - 33.21 2 500 0.15 0.8 - - - 33.44 0.69% 3 500 0.03 0.8 - - - 25.54 29.96% Double layer 1 500 0.03 4 300 0.0003 16 17.24 2 500 0.15 0.8 300 0.0015 3.2 17.48 1.37% 3 500 0.03 0.8 300 0.0003 3.2 15.71 9.05%
Table 2. Working condition parameter setting table
View tableView in ArticleTable 2. Working condition parameter setting table
Case Scaling ratio Flue gas flow/kg·s–1 Flue gas temperature/ K H2O Mole fraction CO2 Mole fraction 1 1∶1 40 700 5% 5% 2 1∶2 10 700 10% 10% 3 1∶2 10 700 5% 5% 4 1∶4 2.5 700 20% 20% 5 1∶4 2.5 700 5% 5%
Table 3. Integral radiation intensity of stack exhaust system with different scaling ratios
View tableView in ArticleTable 3. Integral radiation intensity of stack exhaust system with different scaling ratios
Case Integral radiative intensity/W·sr–1 Similarity transformed integral radiative intensity/W·sr–1 Relative deviation 1 282.53 282.53 0 2 72.15 288.60 2.15% 3 65.36 261.44 7.46% 4 17.98 287.68 1.82% 5 15.81 252.96 10.47%
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Zhiling LIU, Bin YANG, Zhiwei LI, Zhen WANG, Yifeng AN, Zhifeng HUANG. Study on the similarity of infrared radiative characteristics of ship exhaust plumes[J]. Infrared and Laser Engineering, 2025, 54(6): 20250016
Paper Information
Category: Infrared
Received: Jan. 6, 2025
Accepted: --
Published Online: Jul. 1, 2025
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