基于改进PMV指标的飞机驾驶舱热舒适性分析

由于飞机驾驶舱处于高空太阳辐射的狭小热环境中,现有的人体热舒适性评价指标无法准确评价其热舒适性。本文从人体热平衡方程出发,对人体热舒适性预测平均评价(PMV)指标中的辐射换热项进行了修正,提出了一种适用于飞机驾驶舱内部热舒适性评价的指标PMV_F(PMV for Fighter)。同时,采用雷诺平均Navier-Stokes(RANS)方法对驾驶舱内部气流组织进行了数值计算,并对其热舒适性进行了分析。计算结果与实验数据吻合较好,基于PMV_F指标的计算结果能够反映驾驶舱内飞行员的热舒适状况,表明该方法可以用于飞机驾驶舱的热舒适性设计与评价。

Analysis of thermal comfort in aircraft cockpit based on the modified PMV index

To measure the thermal comfort of an aircraft cockpit with narrow space and high solar radiation for the pilot in the sky, the predicted mean vote (PMV) index has been studied in this paper. By increasing the effect of solar radiation in the human heat balance equation, an improved evaluation index PMV_F (PMV for Fighter) has been suggested in this paper. Meanwhile, numerical simulations as to an aircraft cockpit''s flow field and temperature field have been taken by Reynolds average Navier-Stokes (RANS) method. The numerical simulation results are in a good agreement with the experimental data. The results of the PMV_F fit well with the status of pilot''s thermal comfort. It shows that the method of numerical simulation based on the new evaluation index PMV_F can be used to analyze the thermal comfort in aircraft cockpit.