Article: Numerical study on non-ventilated flame diffusion characteristics in aero-engine nacelle Journal: International Journal of Wireless and Mobile Computing (IJWMC) 2020 Vol.19 No.2 pp.107 - 123 Abstract: A numerical study on flame diffusion characteristics was effectuated in an aero-engine nacelle. A non-ventilated physical model was established with both ends in open condition. A calculated model was constructed by fire classical software based on LES method. Twelve detectors were placed along horizontal and tangential directions to trace variations of flame characteristic parameters such as temperature, pressure, and velocity together with component concentrations. The results show that the non-premixed flame characteristic parameters undergo both transient and steady states. In the transient state, the temperature, velocity, and oxygen together with soot concentrations evidently change (increase or reduce). Those parameters increase along the inner cylinder in left part of the nacelle, however they vary in opposite manner. Those parameter changes are more evident at the top and bottom of the nacelle. The pressure variation is not evident in the nacelle. In the steady state, those parameter distributions are quasi-symmetrical. Inderscience Publishers - linking academia, business and industry through research

Title: Numerical study on non-ventilated flame diffusion characteristics in aero-engine nacelle

Authors: Yu Zheng; Guanbing Cheng; Guoda Wang; Shuming Li; Yimeng Hao

Addresses: College of Aeronautical Engineering, Civil Aviation University of China, Tianjin, China ' College of Aeronautical Engineering, Civil Aviation University of China, Tianjin, China ' College of Aeronautical Engineering, Civil Aviation University of China, Tianjin, China ' College of Aeronautical Engineering, Civil Aviation University of China, Tianjin, China ' College of Aeronautical Engineering, Civil Aviation University of China, Tianjin, China

Abstract: A numerical study on flame diffusion characteristics was effectuated in an aero-engine nacelle. A non-ventilated physical model was established with both ends in open condition. A calculated model was constructed by fire classical software based on LES method. Twelve detectors were placed along horizontal and tangential directions to trace variations of flame characteristic parameters such as temperature, pressure, and velocity together with component concentrations. The results show that the non-premixed flame characteristic parameters undergo both transient and steady states. In the transient state, the temperature, velocity, and oxygen together with soot concentrations evidently change (increase or reduce). Those parameters increase along the inner cylinder in left part of the nacelle, however they vary in opposite manner. Those parameter changes are more evident at the top and bottom of the nacelle. The pressure variation is not evident in the nacelle. In the steady state, those parameter distributions are quasi-symmetrical.

Keywords: engine nacelle; FDS; diffused flame; temperature; velocity; soot concentration.

DOI: 10.1504/IJWMC.2020.110184

International Journal of Wireless and Mobile Computing, 2020 Vol.19 No.2, pp.107 - 123

Received: 24 Nov 2019
Accepted: 18 Dec 2019
Published online: 08 Oct 2020 *

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Title: Numerical study on non-ventilated flame diffusion characteristics in aero-engine nacelle

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