CAJ | 학술논문

计算流体力学问题的边界条件处理方法关系到数值仿真结果的精确度.为解决算法的精度,提出了三维可压缩湍流流动的边界条件数值处理方法,对所研究的边界类型包括进口边界、出口边界和固体壁面,流动的速度范围涉及亚音速、跨音速和超音速.流场数值仿真采用SIMPLE算法,湍流采用κ-ε模型仿真.将边界总结为沟通型和孤立型边界两种类型,对每一控制方程分别阐述特定的数值处理方法.应用提出的边界处理方法对单圆弧凸包通道进行数值仿真获得了合理的结果,跨音速和超音速情形下准确地计算出了流场中存在的激波.
계산류체역학문제적변계조건처리방법관계도수치방진결과적정학도.위해결산법적정도,제출료삼유가압축단류류동적변계조건수치처리방법,대소연구적변계류형포괄진구변계、출구변계화고체벽면,류동적속도범위섭급아음속、과음속화초음속.류장수치방진채용SIMPLE산법,단류채용κ-ε모형방진.장변계총결위구통형화고립형변계량충류형,대매일공제방정분별천술특정적수치처리방법.응용제출적변계처리방법대단원호철포통도진행수치방진획득료합리적결과,과음속화초음속정형하준학지계산출료류장중존재적격파.
The treatment of boundary conditions for computational fluid dynamics is vital for the precision of compotation results,hence numerical methods of boundary treatment are discussed,the inlet boundary,outlet boundary and wall boundary are included,and the flow speed covers subsonic,transonic and supersonic.SIMPLE algorithm is used to simulate the flowfield,and κ-ε model is employed to model the turbulence.The boundary conditions fall into two types:the isolation type and the communication type,and the specific treatments for every control equation are proposed.The single-circle bump channel is numerically simulated to testify the proposed boundary treatment and good results are achieved.The shock wake is precisely captured for the transonic and supersonic flow.