摘要
以FSC方程式赛车模型为研究对象,利用虚拟风洞实验(VWT)探讨不同尾翼攻角对整车气动性能的影响,得到赛车气动升力特性。考虑了轮胎的非线性,从赛车转弯时轮荷变化入手,研究赛车不同尾翼攻角对应的轮胎侧向力分配及最大侧向加速度。研究结果表明,在一定范围内增大尾翼攻角可获得较大的侧向加速度,且可以降低赛车过弯侧翻的风险。尾翼攻角增加到20°附近后,由于尾翼失速会造成下压力损失,继续增大攻角反而不利于获得较大侧向加速度。最后,研究了赛车在不同尾翼攻角下的稳态转向特性,结果表明,适当增大尾翼攻角可以削弱赛车过多转向特性的趋势。
Taking the FSC formula racing car as the research object,influences of series wing attack angles on the aerodynamics behavior were investigated by virtual wind tunnel（VWT）. Taking account of the nonlinear property and the vertical load of the tire when turning,the lateral force distribution of tire and the maximum lateral acceleration were studied under several rear wing attack angles. Results show that within a certain range,the increasing of rear wing attack angle is helpful to obtain larger lateral acceleration and reduce the risk of rollover accident. When the rear wing attack angle increases to near 20°,pressure losing which was caused by stalling of rear wing is not benefit to keep a larger lateral acceleration. Lastly,the steady turning performance under different rear wing attack angles were studied,it can be deduced that reasonable increasing of the rear wing attack angle can weaken oversteering trend for the racing car.
作者
付艳恕
王震
FU Yan-shu;WANG Zhen(School of Mechanical ＆ Electrical Engineering,Nanchang University,Jiangxi Nanchang 330031,China)
出处
《机械设计与制造》
北大核心
2018年第5期262-265,共4页
Machinery Design & Manufacture
基金
国家自然科学基金(11202093)
江西省自然科学基金(20151BAB216022)
关键词
方程式赛车
虚拟风洞
尾翼攻角
最大侧向加速度
转向特性
FSC Racing Var
Virtual Wind Tunnel
Rear Wing Attack Angle
Maximum Lateral Acceleration
Turning Performance
