烟气扩散对海上直升飞机操作影响的安全分析及评估的理论研究

Theoretical Study on Safety Analysis Assessment for Operation of Helicopter on the Offshore Affected by Exhausted Gas Diffusing

采用气体多组分流动及传热数学模型,数值模拟了某海洋平台上的排烟设备所排放的高温烟气的扩散规律。并通过规范CAP437提出的直升飞机起飞和降落安全操作的判定标准,对海洋平台上直升飞机起降操作的安全性进行了分析评估。研究结果表明,高温烟气和大气湍流对直升飞机起降的安全操作都存在影响,而高温烟气的影响起到决定性作用。同时理论研究获得了直升飞机操作的年不可用概率。计算结果为直升机甲板的优化设计提供重要依据。

Multiple components gas flow and heat transfer mathematics model are adopted to simulate diffusion rule of high-temperature gas exhausted by some equipments on offshore platform. Set the judging standard on safely taking off and landing of helicopter in CAP437 Code as a rule are presented . Results show that both high-tempera- ture exhausted gas and atmosphere turbulence could make effects on safety operation of helicopter＇ s taking off and landing, and the former is the decisive factor. Meanwhile, annual unavailable probability for helicopter operating is obtained by theoretical study. This study result could offer support for optimum design of helicopter deck.