ABSTRACT: Objective To make the helicopter of 7-2 drilling and production platform take off safely and control the probabil-ity of the helicopter's annual unavailability at lower than 10%. Methods The flow, temperature rise and turbulence distribution of the high temperature smoke over the helicopter deck were simulated under multi wind direction and wind speed based on fluent software. According to the safety principle of helicopter take-off and landing recommended by CAP43-7 standard, the annual impact probability of temperature rise and turbulence on takeoff and landing of helicopter was calculated. Results The probability value of the unavailability of the helicopter was obtained. It was 8% under working condition M1 and 9% under working condition M2. Conclusion The results provide a theoretical basis for the determination of the layout of the smoke pipe and the helicopter deck on the platform, and take a guiding role for the landing operation of the platform helicopter.%目的 确保南海A钻采平台直升机安全起降,直升机全年不可用概率控制在10%以内.方法 通过Fluent软件数值模拟多工况、多风向风速下高温烟气在直升机甲板上方及周围空间的流动、温升及湍流分布规律,以 CAP43-7 标准所推荐直升机起飞和降落的安全原则为判定依据,分析计算温升和湍流对直升机起飞和降落的全年影响概率.结果 综合得出直升机不可用概率理论值,M1工况为8%,M2工况为9%.结论 模拟计算结果为平台主机烟管及直升机甲板布置方案的确定提供理论依据,为平台直升机起降操作起到指导作用.
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