Cowl Point造型与工程设计冲突问题分析

Cowl Point是汽车造型设计的关键硬点,为解决造型设计与工程设计冲突的问题,文章通过对新研发车型的Cowl Point造型设计引起的一系列工程设计问题进行分析,归纳问题存在的原因。将这些工程问题转化为造型设计工程师所了解的量化信息,总结出造型设计初期需提供给造型工程师的工程限制条件。使造型设计与工程设计达到宏观上的统一,完成了工程框架中造型创意设计。

Study of Flow Field inside a Rectangular Air Intake with Pointed Cowl for Different Back Pressures at Mach 2.2

Computations and Experiments were performed to get an understanding of the flow field around a rectangular supersonic air intake with pointed cowl [90°] at different back pressures for Mach 2.2. The effect of Cowl shape on the ramp surface pressure distribution is discussed and compared with existing V-Notch [90°] intake model at free exit condition. It was found that using pointed cowl [90°] intake model, a better pressure recovery was achieved compared to the V-Notch [90°] intake model at Mach 2.2. Both Pointed and V-Notch intake models showed good starting characteristics. For change in back pressure, the occurence of normal shock, flow separation zone and flow reversal were observed. All experiments are performed only for the Pointed cowl [90°] intake model. All the 3-D computations were performed by using software available at B.I.T, Mesra, Ranchi.

汽车Cowl点在整车布置中的影响因素探讨

汽车Cowl点处于汽车机舱与乘员舱交界位置,所处的位置决定其在汽车设计开发中的重要性,但在汽车前期的造型设计、布置设计中往往未能引起足够的重视,导致Cowl点位置设置不合理,从而引起设计方案的反复修改。文章列举了Cowl点的布置影响因素,结合车型开发经验对重点因素进行分析,对汽车开发中遇到的相关问题提出优化方向。结果表明,汽车Cowl点的位置对整车造型、性能、布置、工程化开发等诸多方面均有不同程度的影响,需要相互协调,因此在汽车设计开发前期充分考虑Cowl点的位置,能起到事半功倍的效果。