东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (11): 1607-1612.DOI: 10.12068/j.issn.1005-3026.2017.11.018

• 机械工程 • 上一篇    下一篇

环形混合器混合排气系统气动形面的优化设计

谢翌1,2， 刘坤1   

  1. (1. 重庆大学 汽车工程学院， 重庆400044; 2. 重庆大学 机械传动国家重点实验室， 重庆400044)
  • 收稿日期:2016-05-18 修回日期:2016-05-18 出版日期:2017-11-15 发布日期:2017-11-13
  • 通讯作者: 谢翌
  • 作者简介:谢翌(1983-)，男，重庆人，重庆大学副教授，博士.
  • 基金资助:
    国家自然科学基金青年基金资助项目(51405045).

Optimization Design of Aerodynamic Shape of Splitter Mixing Exhaust System

XIE Yi 1,2， LIU Kun1   

  1. 1. College of Automotive Engineering， Chongqing University， Chongqing 400044， China; 2. The State Key Laboratory of Mechanical Transmission， Chongqing University， Chongqing 400044， China.
  • Received:2016-05-18 Revised:2016-05-18 Online:2017-11-15 Published:2017-11-13
  • Contact: XIE Yi
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摘要： 以B样条曲线为基础、采用计算流体力学方法，并结合改进的粒子群优化算法，提出了一套环形混合排气系统喷管型线与环形混合器径向位置的一体化优化设计方法，并采用该方法对某型使用中的环形混合器混合排气系统进行了优化设计.优化结果表明，较之原始模型，优化后的环形混合器混合排气系统在流量分配方面与设计值更为接近，涵道比的误差为2.8%.气动性能方面，设计条件下，优化模型推力为原始模型的1.061倍，总压恢复系数则提升至0.995;在非设计条件下，优化模型的总压恢复系数较原始模型提高了0.7%和0.4%，推力较原始模型提高了1.2%和2.7%.

关键词: 环形混合器混合排气系统, B样条曲线, 环形混合器位置, 喷管形状, 气动性能, 涵道比

Abstract: An integrated optimization design method for nozzle configuration and splitter radial location was proposed using B-spline curve， computational fluid dynamics method and improved particle swarm optimization. Then the proposed method was implemented to optimize a splitter mixing exhaust system. The results indicate that the optimized system has better mass flux distribution than the original model. The difference of bypass ratio between optimized model and design value is 2.8%. In aerodynamic performance aspect， the thrust of optimized splitter mixing exhaust system is 1.061 times as the original model， and the total pressure recovery coefficient increases to 0.995. Under the off-design conditions， compared with the original model， the total pressure recovery coefficients of optimized model increase respectively by 0.7% and 0.4%， and the thrust increases respectively by 1.2% and 2.7% .

Key words: splitter mixing exhaust system, B-spline curve, splitter location, nozzle configuration, aerodynamic performance, bypass ratio

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