CAJ | 학술논문

基于Ahmed模型,采用重叠网格和不连续网格两种方法对直道超车过程的外部流场进行了数值仿真。通过比较仿真结果,验证了重叠网格应用于超车过程外部流场数值仿真上的适用性和准确性,并进一步应用重叠网格方法实现了变道超车过程的外部流场数值仿真,揭示了在变道超车过程中,两车外部流场相互干扰的流动特性。通过以上计算,指出了重叠网格在解决诸如变道超车等问题的潜力,为解决实际车型的变道超车等问题提出了简便实用的方法,具有一定的指导意义。
기우Ahmed모형,채용중첩망격화불련속망격량충방법대직도초차과정적외부류장진행료수치방진。통과비교방진결과,험증료중첩망격응용우초차과정외부류장수치방진상적괄용성화준학성,병진일보응용중첩망격방법실현료변도초차과정적외부류장수치방진,게시료재변도초차과정중,량차외부류장상호간우적류동특성。통과이상계산,지출료중첩망격재해결제여변도초차등문제적잠력,위해결실제차형적변도초차등문제제출료간편실용적방법,구유일정적지도의의。
The automotive external flow field during the overtaking in line process is simulated between the discontinuous mesh and overset mesh method based on Ahmed model.The applicability and accuracy of overset mesh method in simulating the automotive external flow field are proved by comparing the simulation results.Then the overset mesh method is adopted further to realize the external flow field simulation during the overtaking by switching lines process and to reveal the interfere characteristics of external flow field of the two vehicles.These calculations show the potential of overset mesh method to solve the problems such as overtaking by switching lines,and which can provide a way for solving such problems of the actual vehicles.