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浮顶油罐一二次密封空间内的油气在雷击作用下可导致起火事故。为研究浮顶油罐一二次密封空间内的油气分布规律及影响因素,建立了浮顶油罐实验模型,在不同的外界风速和温度下,检测一二次密封空间内不同位置的油气体积分数,并进行油气扩散机理分析,合理假设未知参数,将实验模型的固有参数代入数值公式中,两者表征的油气变化情况较吻合,从而得出更为详细的油气分布规律及影响因素。结果表明:以背风点为起点,一二次密封空间内各处的油气体积分数不断升高,在迎风点附近油气体积分数达到最高;温度和风速的增加均可使一二次密封空间内油气分布差异增大,较温度而言,风速对其不均匀分布影响更为明显。
The oil and gas in the sealed space of the floating roof tank can cause a fire accident when struck by lightning. In order to study the law and influencing factors of oil and gas distribution in the first and second sealed space of the floating roof tank, an experimental model of the floating roof tank was set up to detect the volume of oil and gas at different positions in the first and second sealed spaces under different outside wind speed and temperature Fraction, and the mechanism of oil-gas diffusion is analyzed. The unknown parameters are reasonably assumed, and the inherent parameters of the experimental model are substituted into the numerical formula. The changes of the oil and gas characters indicated by the two are in good agreement with each other to obtain more detailed oil and gas distribution rules and influencing factors. The results show that starting from the lee point, the volume fraction of oil and gas in the first and second sealed spaces increases continuously, and the volume fraction of oil and gas reaches the maximum near the windward point. Both the temperature and the wind speed increase the oil and gas in the first and second sealed spaces Distribution differences increase, compared with the temperature, the impact of wind speed on its uneven distribution is more obvious.