基于体积力模型的大S弯进气道与风扇耦合计算研究

doi:10.13675/j.cnki. tjjs. 180460

推进技术 ›› 2019, Vol. 40 ›› Issue (7): 1441-1448.DOI: 10.13675/j.cnki. tjjs. 180460

• 总体与系统 • 下一篇

基于体积力模型的大S弯进气道与风扇耦合计算研究

中国空气动力研究与发展中心高速空气动力研究所

发布日期:2021-08-15
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）。

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

High Speed Aerodynamics Institute，China Aerodynamic Research and Development Center,Mianyang 621000,China

Published:2021-08-15

摘要/Abstract

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

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

. 基于体积力模型的大S弯进气道与风扇耦合计算研究[J]. 推进技术, 2019, 40(7): 1441-1448.

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基于体积力模型的大S弯进气道与风扇耦合计算研究

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

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