Research on deposition characteristics of vessel oil mist on metal and fabric surfaces
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摘要: 摘 要:【目的】研究舰船舱室环境油雾(包括汽轮机油释放的液态油滴和气态污染物)在金属和织物表面的沉降特性,为舰船舱室环境控制提供参考。【方法】在实验舱内释油雾,让其在目标表面上沉降,称量表面沉降前后的质量差即为表面上的沉降质量,以此来对比不同朝向、不同材质表面的油雾沉降特性;将水平向下表面的沉降合理假设为气相沉降,估算气相沉降的贡献,并计算颗粒相的沉降速度。【结果】朝向方面,金属水平向上表面的油雾沉降质量是竖直表面和水平向下表面的3.98倍和4.66倍,织物,水平向上表面的油雾沉降质量是竖直表面和水平向下表面的1.08倍和1.20倍;材质方面,织物的水平向下、竖直和水平向上表面的油雾沉降质量分别是同朝向的金属表面的49.1倍、169.8倍和155.5倍。估算表明,对于金属的水平向上和竖直表面,气相沉积的贡献分别为21.5%和79.2%,对于织物的水平向上和竖直表面,气相沉积的贡献约为90%。【结论】舰船舱室环境油雾在织物表面的沉降远强于在金属表面的沉降;在金属水平向上表面的沉降远大于竖直表面和水平向下表面;在三种朝向的织物表面的沉降差别并不明显;无论何种材质、何种朝向,气相沉降都不可忽视。对于舰船舱室环境,气相沉降占据主导作用。Abstract: Abstract: [Objectives] The deposition characteristics of vessel oil mist (including liquid droplets and gaseous contaminants released from turbine oil) on metal and fabric surfaces were studied, providing reference for the control vessel cabin environment. [Methods] The oil mist was released in an experimental cabin, and it is allowed to deposit on the target surfaces. The mass difference before and after the deposition of the surfaces was weighed to be the deposition mass on the surface and the oil mist deposition characteristics of surfaces with different orientations and materials were compared. The deposition of the horizontal downward surface was reasonably assumed to be the gas phase deposition, the contribution of the gas phase deposition was estimated, and the particle phase deposition velocity was calculated. [Results] The oil mist deposition mass on the horizontal upward surface of the metal was 3.98 times and 4.66 times that of the vertical surface and the horizontal downward surface. For the fabric surfaces, the oil mist deposition mass on the horizontal upward surface was 1.08 times and 1.20 times that of the vertical surface and the horizontal downward surface. For material comparison, the deposition mass of oil mist on the horizontal upward, vertical and horizontal downward surfaces of the fabric was 49.1 times, 169.8 times and 155.5 times that of the metal surface facing the same direction, respectively. Estimates show that the contribution of phase deposition for the metal horizontal and vertical surface was 21.5% and 79.2%, respectively. The contribution of phase deposition for fabric surfaces was about 90%. [Conclusions] The vessel oil mist deposition on the fabric surface was much stronger than that on the metal surface. The deposition on the metal horizontal upward surface was much larger than that on the vertical surface and the horizontal downward surface. The difference of deposition on three orientations fabric surfaces was not significant. Regardless of the orientation and material, gas phase deposition cannot be ignored. For the vessel cabin environment, gas phase deposition plays a dominant role.
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Key words:
- Key words:vessel cabin /
- oil mist /
- metal surface /
- fabric surface /
- deposition velocity
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