Author:
He Shudong,Xie Yangbin,Bai Haocen,Peng Youduo,Jin Yongping
Abstract
AbstractThe pressure of the recovered sample is intricately connected to seawater temperature, the recovery velocity, and the pressure of the pre-charged gas. To better understand the sample pressure dynamics during the sampling recovery process, we focus on a gas-tight sediment sampler, delving into its pressure-compensation and pressure-retaining mechanisms. A comprehensive thermal and thermodynamic analysis is conducted throughout the entire pressure-retaining sampling process, examining the temporal variations in the temperatures of seawater and nitrogen within the sampler at various descending velocities. The heat transfer and thermodynamics are examined throughout the entire pressure-retaining sampling process to determine how changes in the temperatures of seawater and nitrogen, as well as the descent velocity, affect the pressure-retaining performance. The influence of pre-charging pressure and recovery velocities on the pressure-retaining performance of the sampler is examined. Then the proposed numerical model was well verified by the ultra-high-pressure vessel experiments of the sampler under 115 MPa. Finally, the sea trial results further verified the accuracy of the numerical model.
Funder
the Natural Science Foundation of Hunan Province of China
National Key R&D Program of China
Publisher
Springer Science and Business Media LLC
Reference33 articles.
1. Wang, H. et al. Collection of sediment from the Mariana Trench with a novel pressure-retaining sampler. Deep Sea Res. Part I 183, 103740 (2022).
2. Jamieson, A. J., Fujii, T., Mayor, D. J., Solan, M. & Priede, I. G. Hadal trenches: The ecology of the deepest places on Earth. Trends Ecol. Evol. 25(3), 190–197 (2010).
3. Yan, T. N., Bu, J. W. & Li, S. J. Brief study on the international present condition and developing tendency of the technology of sea floor sample drilling. Geol. Sci. Technol. Inf. 19(2), 67–70 (2000).
4. Drazen, J. C. & Yeh, J. Respiration of four species of deep-sea demersal fishes measured in situ in the eastern North Pacific. Deep Sea Res. I 60, 1–6 (2012).
5. Jørgensen, B. B. & Boetius, A. Feast and famine: Microbial life in the deep-sea bed. Nat. Rev. Microbiol. 5(10), 770–781 (2007).