Influence of air entraining position on radial pre-swirl system

被引：0
|
作者：
Zhang K. [1 ]
Wang S. [1 ]
Hou X. [1 ]
Wei G. [1 ]
机构：
[1] Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2020年 / 35卷 / 03期
关键词：
Air entraining position; Pressure loss; Radial pre-swirl; Specific entropy increment; Temperature drop coefficient;
D O I：
10.13224/j.cnki.jasp.2020.03.006
中图分类号：
学科分类号：
摘要：
To reduce the flow loss in radial pre-swirl system, numerical simulation method was used to analyze the radial pre-swirl system with different air entraining positions of the cavity. The results showed that the swirl ratio of air flow at the pre-swirl nozzle outlet decreased, the temperature drop coefficient and total pressure loss coefficient increased with the increase of the radial air entraining position. When rotational Reynolds number was 7.9×106, the temperature drop coefficient increased by 525% and the total pressure loss coefficient increased by 3.93% when the air entrainment position changed from low to high. The specific entropy increment in the radial pre-swirl system mainly occurred in the pre-swirl nozzle and the co-rotating cavity, accounting for about 80% of the total specific entropy increment. With the increase of the radial air entraining position, the overall specific entropy increment decreased, and the specific entropy increment proportion of the pre-swirl nozzle increased. However, the spectific entropy increment proportion of co-rotating cavity decreased. © 2020, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：502 / 509
页数：7
相关论文
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