For extensive use of low global warming potential refrigerants with low flammability, there is a need to develop a simple method to distinguish the lower flammability refrigerants from the higher flammability ones. The purpose of this paper is to investigate the applicability of the test method for flat-plate quenching distance (d_q) for predicting the maximum burning velocity (S_{u0, max}) of near 10 cm s⁻¹. The d_q measurement was carried out by the ASTM E582–07 method and the modified method for six binary blends that all have S_{u0, max} of approximately 10 cm s⁻¹. It was found that the standard 25-mm diameter glass plates placed in the vertical position give at most 11% smaller d_q values than 50-mm diameter plates placed in the horizontal position, which was due to the upward motion by the buoyancy. Based on the thermal loss theory, a simple equation using the experimental d_q was obtained to predict the S_{u0, max} of the lower flammability blends.

为了广泛使用具有低易燃性的低全球变暖潜能的制冷剂，需要开发一种简单的方法来将低易燃性制冷剂与高易燃性制冷剂区分开。本文的目的是研究平板熄火距离（试验方法的适用性d _q）用于预测的最大燃烧速度（小号_U0，最大的邻近10厘米S）^-1。所述d _q测定通过ASTM E582-07的方法和六种二元混合物的改进方法进行，即所有具有小号_U0，最大的大约10cm小号^-1。发现放置在垂直位置的标准25毫米直径玻璃板的d _q值比放置在水平位置的50毫米直径玻璃板最多小11％，这是由于浮力引起的向上运动。基于热损失的理论，用实验的简单公式d _q，得到预测小号_U0，最大下可燃性共混物。