EQ1092型载货车加装气动附加装置的模型风洞试验研究

在KD－3型低速风洞中采用1∶10的EQ1092汽车模型进行风洞测力试验；研究了对 该模型底部、车箱两侧作平整处理，装前阻风板，驾驶室与货箱间圆滑过渡等改型方案对其 气动特性的影响。结果表明，加装适当的空气动力学附加装置能有效地提高汽车的气动性能 ，加装形状合适的阻风板能降低空气阻力625 ％，各附加装置的组合使EQ140汽车模型的 空气阻力系数下降119 ％。

The force test is conducted for EQ1092 truck model with a scale of 1∶10 in KD－3 low speed wind tunnel. The effect of modified schedules, such as smooth treatments for bottom of the model, two sides of cargo body, assembling a front air－dam, smooth transition between cab and cargo body, on aerodynamic c haracteristics is studied. It is shown by results that assembling appropriate ae rodynamic attachments can improve effectively the aerodynamic performance of mot or vehicle, assembling a suitable shape of air－dam can reduce the drag coeffici ent by 6.25 ％, the total attachment devices in EQ140 truck model can reduce the drag coefficient by 11.9 ％.