^pof;
Metrological;
Technology;
and;
Engineering,;
China;
Jiliang;
University,;
Hangzhou;
310018,China;
^pof;
Fluid;
Engineering,;
School;
of;
Energy;
and;
Power;
Engineering,;
Xi'an;
Jiaotong;
University,;
Xi'an710049,;
China;
稳定流动; 三维应力; 数值解; 空间平均; 波纹; 管具; 解析; 数值方法;