Impact of Wind on Ejection Seat Escape Performance

YU Jia; MAO Xiaodong; LIN Guiping; BU Xueqin

doi:10.7527/S1000-6893.2013.0132

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2013 , Vol. 34 >Issue 4: 727 - 740

DOI: https://doi.org/10.7527/S1000-6893.2013.0132

Fluid Mechanics and Flight Mechanics

Impact of Wind on Ejection Seat Escape Performance

YU Jia ,
MAO Xiaodong ,
LIN Guiping ,
BU Xueqin

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1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;
2. College of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China

Received date: 2012-04-24

Revised date: 2012-07-16

Online published: 2013-04-23

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Abstract

In this paper, a dynamic model is built for a certain type of ejection seat which takes into consideration the impact of wind speed in the ejection process. Different wind speeds and directions as well as different ejection velocities are selected as the state of the computation numerical simulation of the ejection process is performed, and then the impact of wind on the escape performance of the ejection seat is analyzed according to the numerical simulation results. By an analysis of the impact of front wind, lateral wind, and atmospheric vertical motion on the ejection seat respectively with low and medium velocities, the paper reveals that: greater headwinds will not only reduce the trajectory height of the canopy inflation process, but also engender oscillation and swing of the man-parachute system, thus impacting safe escape; the vertical movement of the atmosphere directly affects the vertical trajectory of the system and it is the greatest influence on the escape performance of the ejection-escape system. The results show that headwind, lateral wind and atmospheric vertical motion all have a negative influence on the escape performance of an ejection seat, and the actual ejection process must take into consideration the impact of wind speed on the ejection performance.

Key words： ejection seat; atmosphere motion; wind speed; numerical simulation; escape performance

Cite this article

YU Jia , MAO Xiaodong , LIN Guiping , BU Xueqin . Impact of Wind on Ejection Seat Escape Performance[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013 , 34(4) : 727 -740 . DOI: 10.7527/S1000-6893.2013.0132

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