The outflow field of a simplified fast back car were studied with numerical methods of different discretization scheme with the CFD code STAR-CD.
以简化的直背式轿车模型为研究对象,以商用计算流体力学软件STAR—CD为工具,应用不同的离散格式对轿车外流场进行了数值模拟,通过与试验结果的对比,比较了各种离散格式对直背式轿车外流场数值模拟的适用性,同时对SIMPLE算法及其两种修正方法PISO算法和SIMPISO算法的计算精度的影响进行了研究。
The aerodynamic characteristics of a simplified fast back car with roof rack were studied with numerical methods of moving groud boundary condition with the CFD code STAR-CD.
以简化的直背式轿车模型为研究对象,以商用计算流体力学软件STAR-CD为工具,利用移动边界条件进行三维数值模拟,计算了加装行李架前后的轿车在不同车速下的车身气动阻力系数和升力系数,并通过与试验结果的对比,验证了数值计算结果的正确性。
Objective To study the radiological appearance and characters of straight-back syndrome,and to explore its diagnostic standard with X-ray.
目的研究直背综合征X线表现和特点,探讨X线诊断标准,提出X线分级方法。
