Experimental Study of the Jet Engine Exhaust Flow Field of Aircraft and Blast Fences
Abstract
A combined blast fence is introduced in this paper to improve the solid blast fences and louvered ones. Experiments of the jet engine exhaust flow (hereinafter jet flow for short) field and tests of three kinds of blast fences in two positions were carried out. The results show that the pressure and temperature at the centre of the jet flow decrease gradually as the flow moves farther away from the nozzle. The pressure falls fast with the maximum rate of 41.7%. The dynamic pressure 150 m away from the nozzle could reach 58.8 Pa, with a corresponding wind velocity of 10 m/s. The temperature affected range of 40°C is 113.5×20 m. The combined blast fence not only reduces the pressure of the flow in front of it but also solves the problems that the turbulence is too strong behind the solid blast fences and the pressure is too high behind the louvered blast fences. And the pressure behind combined blast fence is less than 10 Pa. The height of the fence is related to the distance from the jet nozzle. The nearer the fence is to the nozzle, the higher it is. When it is farther from the nozzle, its height can be lowered.References
Melbourne WH. Criteria for environmental wind conditions. J Wind Eng Ind Aerodyn. 1978;3(2-3):241–249.
Durgin FH. Pedestrian level wind criteria using the equivalent average. J Wind Eng Ind Aerodyn. 1997;66(3):215-226.
Bottema M. A method for optimisation of wind discomfort criteria. Build Environ. 2000;35:1-18.
Willemsena E, Wisseb JA. Design for wind comfort in The Netherlands: Procedures, criteria and open research issues. J Wind Eng Ind Aerodyn. 2007;95:1541-1550.
Janssen WD, Blocken B, van Hooff T. Pedestrian wind comfort around buildings: Comparison of wind comfort criteria based on whole-flow field data for a complex case study. Build Environ. 2013;59:547-562.
Weng X, Cai L. Airport Pavement Design, 2th ed. [In Chinese]. Beijing: China Communication Press; 2007.
Turnbull WJ, Foster CR. Effects of jet blast and fuel spillage on bituminous pavement. J Air Transp Division. 1957;83:71-81.
Tucker TA. Meet USAF blast fence requirements. J Air Transp Division. 1959;85:1-26.
U.S. Department of Transportation. Airport Design Advisory Circular. AC: 150/5300-13. Washington DC: Federal Aviation Administration; 2008.
Kobayashi H, Schrader P, Sunohara Y, Harimoto K, et al. Experimental Study about the Wind Shielding Capabilities of Blast Fences. J Wind Eng. 2000;83:161-173.
Wang Haifu, Cao Sijie, Chong Xiaolei, et al. Numerical Simulation of Different Blast Fence Forms Effect on Jet Flow Field [In Chinese]. J Airf Eng U (Nat. Sci. Ed.). 2012; 13(2):16-19.
Wang Haifu, Cai Liangcai, Chong Xiaolei, et al. Plane Dimension Design of Composite Flow Guiding screen [In Chinese]. Archit Technol. 2010; 41(11):1057-1058.
Jie Lin. Study of Characteristic for Nozzle Flow Field of Aircraft Engine [PhD thesis]. Xian: Air Force Engineering University; 2012.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
