摘要
为理解超紧凑大S弯进气道与风扇的耦合效应,基于体积力模拟方法开展了一体化计算研究。研究的进气道长径比为2.5,使用Rotor 67进行耦合分析,体积力模型与冻结转子计算得到的总压比、总温比和等熵效率分别相差4.49%,0.26%和2.38%。流场分析表明,风扇对入口段流场影响较为明显,主要体现为畸变区的顺向偏转与微弱衰减;进气道出口畸变经过风扇叶片后得到改善,大低压区和反向旋流基本消失;而流体在叶片的前后缘旋流角与轴向速度的综合改变量越大,风扇对气流做功越多。总的来说,超紧凑大S弯进气道与风扇之间耦合比较明显,需要在设计时进行详细的考察。
Towards understanding the coupling effect between ultra-compact S-shaped inlet and fan,integrated simulation study was carried out using body force modeling method. The inlet model has a length to diameter ratio of 2.5 and Rotor 67 was used for the coupling analysis. The differences between body force modeling and frozen rotor simulation are 4.49%,0.26% and 2.38% respectively for total pressure ratio,total temperature ratio and isentropic efficiency. Flow field analysis shows that,in the entrance part,the fan has a significant influence on the distorted flow which is co-rotated with the fan and attenuated slightly. The distortion is holistically improved after the fan blades where the large low pressure region and counter-rotating swirl disappear. The more the swirl angle and axial velocity between the leading and trialing edges change,the higher the fan works. In summary,the coupling between the ultra-compact S-shaped inlet and fan is significant and needs to be examined in details.
作者
徐诸霖
达兴亚
吴军强
XU Zhu-Iin;DA Xing-ya;WU Jun-qiang(High Speed Aerodynamics Institute,China Aerodynamic Research and Development Center,Mianyang 621000,China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2019年第7期1441-1448,共8页
Journal of Propulsion Technology
基金
国家自然科学基金(11602291)
