装甲车辆进排气格栅的气动特性试验研究与防护性能分析

以几种典型结构的装甲车辆进排气格栅为研究对象，进行格栅气动性能试验研究，得出其气动特性试验关联式；对比分析了我国与美军装甲车辆进排气格栅的气动性能与防护性能，结果表明：美军车辆进排气格栅的防护性能较好，但气动性能较差。以最小的节流阻力，通过足够量的冷却空气，并获得最大的防护能力为格栅设计的宗旨，本文提出了开度系数作为评价格栅防护性能的无量纲参数，分析表明，在格栅材质和叶片厚度一定的条件下，开度系数值越小表示格栅的防护能力越强。

Aerodynamic Characteristics Experimental Study and Protective Performance Analysis for Intake and Vent Grilles of Armored Vehicles

To study the experimental correlativity of aerodynamic characteristics of intake and vent grilles in armored vehicles,the aerodynamic performance experiments of grille were carried out based on some typical structures.The aerodynamic and protective performances of air intake and vent grilles in China and U.S.military armored vehicles were comparatively analyzed.The results show that the protective performance of intake and vent grilles in U.S.military armored vehicles is better,but their aerodynamic performance is lower.The aim of grille design is to get the maximum protective capability with minimum throttling pressure loss and enough cooling air mass flux.The grille opening coefficient as a dimensionless parameter was proposed to evaluate the grille leaf structure.It is shown from analysis that the smaller opening coefficient means the stronger protective capability on the basis of certain grille material and leaf thickness.