Journal of Propulsion Technology ›› 2019, Vol. 40 ›› Issue (7): 1441-1448.DOI: 10.13675/j.cnki. tjjs. 180460

• System •     Next Articles

Computational Study on S-Shaped Inlet and FanCoupling Based on Body Force Model

  

  1. High Speed Aerodynamics Institute,China Aerodynamic Research and Development Center,Mianyang 621000,China
  • Published:2021-08-15

基于体积力模型的大S弯进气道与风扇耦合计算研究

  

  1. 中国空气动力研究与发展中心 高速空气动力研究所
  • 作者简介:徐诸霖,硕士,助理工程师,研究领域为推进/机体一体化。E-mail:527272198@qq.com
  • 基金资助:
    国家自然科学基金 11602291国家自然科学基金(11602291)。

Abstract: 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.

Key words: Inlet;Rotor 67;Total pressure distortion;Swirl distortion;Coupling effect

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。

关键词: 进气道;Rotor 67;总压畸变;旋流畸变;耦合效应