CAJ | 학술논문

为揭示风洞试验中汽车模型姿势对气动升力测量结果的影响规律，以获得精确的测量结果，在HD-2风洞中，对MIRA阶梯背1/3模型的安装支撑方式、离地高度、俯仰角和侧偏角等影响因素进行了研究。结果表明：上述因素均对升力系数产生显著影响；在一定范围内，升力系数随着离地高度增大近似线性减小，随着俯仰角增大近似线性增加，随着侧偏角的增大近似指数增加；对于HD-2风洞，车轮与地面间隙应控制在1mm左右。
위게시풍동시험중기차모형자세대기동승력측량결과적영향규률，이획득정학적측량결과，재HD-2풍동중，대MIRA계제배1/3모형적안장지탱방식、리지고도、부앙각화측편각등영향인소진행료연구。결과표명：상술인소균대승력계수산생현저영향；재일정범위내，승력계수수착리지고도증대근사선성감소，수착부앙각증대근사선성증가，수착측편각적증대근사지수증가；대우HD-2풍동，차륜여지면간극응공제재1mm좌우。
For revealing the law of the influence of car model posture on the measurement results of aerody-namic lift in wind tunnel test to obtain accurate measurement results, the influencing factors including the ways of installation and support, ground clearances, pitch angle and yaw angle of 1/3 notchback MIRA model are investiga-ted in HD-2 wind tunnel. The results show that the above-mentioned factors all have significant effects on lift coeffi-cient. In certain range,the lift coefficient approximately decreases linearly with the increase of ground clearance, goes up nearly linearly with the increase of pitch angle, and approximately exponentially increases with the rise of yaw angle. For HD-2 wind tunnel, the gap between wheel and ground should be controlled within 1mm.