The results show that the airflow separate at the front part of bus,and induces the high drag coefficient of 0 666 5.The aerodynamic characteristic of JT6120 need improving.

• 研究结果表明由于在该车的头部产生了气流分离 ；导致空气阻力系数高达 0 .；6665；说明气动性能存在明显的不足；有必要进行改进