Simulation experiment on air flow and heat transfer of fight plane’s cockpit
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摘要: 对某型歼击机座舱的空气流动和传热进行了全尺寸地面模拟实验.模拟了气动热载荷和人体热载荷,并使用ATM2400型36通道多点气流和温度测量系统测量了5个测试面的速度场以及其中两个测试面和邻近服装表面的温度场.观察了供气流量和集中喷嘴开关对舱内空气流动状态和温度分布的影响,评价了该座舱的舒适性.结果表明:舱内速度场 并非相对座舱纵向中心面对称分布,而座舱内壁面温度分布亦极不均匀;集中喷嘴全开和全关时,舱内气流速度场和温度场及邻近服装表面空气温度的分布情况差别显著,但对舱内气流平均速度和平均温度的影响不大;舱内气流平均速度随供气量呈线性变化.实验结果可为数值模拟提供验证依据.Abstract: A full-scale experiment was carried out on air flow and heat transfer of a fight plane-s cockpit. Aerothermal load and body heat load were simulated, and ATM2400 36-channel airflow and temperature instrument were used to measure velocity fields of 5 measurement planes and temperature fields of 2 measurement planes and near clothing surface. The influnce of air supply flux and the switch of nozzles was observed, and the cockpit comfort was assessed. The results show that velocity fields are asymmetry and temperature distribution on cockpit-s inside wall is unevenness, and the switch of nozzles has great effect on velocity fields, temperature fields and temperature distribution near clothing surface while has little effect on the average velocity and temperature in cockpit, and the average velocity is linear with air supply flux. Experimental results can be used for proving numerical simulation accuracy.
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Key words:
- cockpit /
- air distribution system /
- velocity field /
- temperature field /
- heat load /
- comfort
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