【摘要】 直升机砂尘环境试验风洞内部的热负荷变化范围较大,高低热负荷工况下需要采取不同的调温措施,为了简便地解决其温度控制难题,在对其温度变化进行动态特性分析与建模的基础上,提出了一种引入风速协调因子的砂尘环境试验风洞温度控制策略,并对其控制效果进行了仿真研究,仿真结果表明这一控制策略能在不同的热负荷条件下有效协调加热与制冷两种作用相反的控制措施,并将风洞内的温度控制在要求范围内。更多还原

【Abstract】 The change range of heat load in helicopter’s sand/dust test tunnel is so wide that different heat balance devices are needed for high and low heat loads, and that the temperature control is difficult. In order to solve the temperature control problem more simply, a temperature control strategy with wind speed corresponding factor is presented based on the dynamical analysis and modeling of tunnel’s temperature change. Simulation results show that this control strategy can manage the cooling and heating devices on different load conditions and temperature in tunnel is controlled at demand point successfully.更多还原