Study on aerodynamic performance of outlet pipe of ram air system

Xiaohong Liu; Fuming Xia

doi:10.1117/12.3030189

5 June 2024 Study on aerodynamic performance of outlet pipe of ram air system

Xiaohong Liu, Fuming Xia

Proceedings Volume 13163, Fourth International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2024); 131632B (2024) https://doi.org/10.1117/12.3030189
Event: International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2024), 2024, Xi'an, China

Abstract

In this paper, the ram air outlet pipe can not be installed due to space limitations, and the aerodynamic performance of the ram air pipe among different bending radius and local calibration of pipe is analyzed. In the paper, the computational fluid dynamics (CFD) method is used to calculate flow field of the aircraft to evaluate the ram air outlet performance. At first, the CFD method is used to calculate the reliability of calculation, and then the outlet pipe R/D (1.6,2.3,2.6,2.9) is analyzed and other different cases are calculated, the results show that the larger the radius is, the smaller the outlet flow mass, when R/D is greater than 1.5,the outlet flow rate is basically unchanged, however, the strengthening eddy leads to greater drag coefficient which is increased by 56.4% or so, at the same time the outlet pipe flow is analyzed. Finally, the different calibration states of outlet pipe are calculated and it is found that the flow rate is basically unchanged when the calibration depth is less than 3.5mm,however the flow rate is changed from 4% to 5.8% when calibration depth is 6.5mm. the flow field is analyzed at the same time. the above analysis has important guiding significance for application of batch production in future.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xiaohong Liu and Fuming Xia "Study on aerodynamic performance of outlet pipe of ram air system", Proc. SPIE 13163, Fourth International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2024), 131632B (5 June 2024); https://doi.org/10.1117/12.3030189

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