Pneumatic Heavy Vehicle Aerodynamic Drag Reduction, Safety Enhancement, and Performance Improvement
Pneumatic Heavy Vehicle Aerodynamic Drag Reduction, Safety Enhancement, and Performance Improvement
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气动重型车辆气动减阻、增强安全、提高性能
DOI：
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发表时间：
2004
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影响因子：
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通讯作者：
R. Englar
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文献类型：
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作者：
R. Englar
根据与美国能源部签订的合同，格鲁吉亚技术研究所（GTRI）开发并应用了吹气飞机空气动力学技术，以夹带分离流场，显著降低阻力，并提高重型车辆的燃油经济性。这些空气动力学的改进还导致稳定性和控制、制动和牵引力的增加，从而提高了操作的安全性。GTRI风洞模型对试验重型车辆（HV）模型的结果表明，在增压室中仅使用1 psig的吹气压力，阻力系数降低50%，如果有额外的吹气，阻力降低80%以上。此外，通过吹制不同的槽缝，可以增加制动阻力。提升系数增大，轮胎滚动阻力减小，而下压力产生，牵引力增大。此外，侧向力和偏航力矩产生在车辆的两侧，并通过吹适当的侧槽恢复方向稳定性。这些实验数据证实消除了由侧风引起的方向不稳定性。
Under contract to the US Department of Energy, Georgia Tech Research Institute (GTRI) has developed and applied blown aircraft aerodynamic technology to entrain separated flowfields, significantly reduce drag, and increase the fuel economy of Heavy Vehicles. These aerodynamic improvements also lead to increases in stability and control, braking, and traction, thus enhancing safety of operation. GTRI wind-tunnel model results on test Heavy Vehicle (HV) models demonstrated drag coefficient reductions of 50% using only 1 psig blowing pressure in the plenums, and over 80% drag reductions if additional blowing air were available. Additionally, an increase in drag force for braking was produced by blowing different slots. Lift coefficient was increased for tire rolling resistance reduction, while down force could be produced for traction increase. Also, side force and yawing moment were generated on either side of the vehicle, and directional stability was restored by blowing the appropriate side slot. These experimental data confirmed the elimination of directional instability caused by side-winds.