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Testing Research of the Ejection Seat in Low-Speed Wind Tunnel

Author: WangHui
Tutor: ZhangXiaoJin；XiaoJingPing
School: National University of Defense Science and Technology
Course: Aerospace engineering
Keywords: Ejection Seat Wind tunnel test Test technology Aerodynamic characteristics Bracket interference
CLC: V216.5
Type: Master's thesis
Year: 2007
Downloads: 77
Quote: 1
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Abstract


With the continuous improvement of the performance of the aircraft, as the pilot's \Wind tunnel tests as study design Ejection equipment must pass through a stage of the test data is often the original basis for the design and improvement of life-saving equipment. In this paper, the surface of the human body by the overload situation, the role of the personal protective equipment, the stability of the seat and the catapult track and lifesaving range research and development of low-speed wind tunnel testing of the ejection seat technology to meet our current aviation ejection seat aerodynamic characteristics of the study need to lay the foundation for the future to carry out a similar test research, some useful exploration. Work as follows: (1) through the design of a small stable umbrella dedicated rod strain the balance and helmet Rally balance to measure the ejection seat in a low-speed wind tunnel aerodynamic technology more than balance the ejection seat occupant. low speed aerodynamic characteristics of the helmet, on the stabilizer bar of the stretching sleeve drogue, the true analog ejection state, obtained by the occupant helmet lift aerodynamic loads to the helmet of the occupant of the seat of the domestic models stabilizer bar on a small drogue stable subsystems study provides further improvement of the technical basis; (2) manometry patch affixed by the surface of the flight suit, dress occupant complex the flexible surface pressure distribution tests; study comparative test successfully, while determination of the dress body model of the surface pressure distribution, successfully validated the results of a flexible model for determination of the aerodynamic characteristics of the air ejection seat closer to the actual new low-speed wind tunnel test methods; (3) for the accurate measurement of small-angle range the aerodynamic characteristics of the ejection seat in bracket interference to reduce the support system for new ejection seat has a complex structure and thin wall, strong enough seat wall and installation of days usually find benchmark difficult problem successfully solved through rational design well on the basis of the seat does not destroy the strength of the probe arm supporting system, the strut by the seat back depth model test. To successfully achieve a seat back brace interference to reduce low-speed wind tunnel tests of the air ejection seat bracket provides a technical basis; (4) the use of low-speed wind tunnel tests test technology, the development of new high-performance ejection seat the results of the study provide a technical basis for the development of the domestic seat aerodynamic characteristics of theoretical studies and models seat.

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CLC: > Aviation, aerospace > Aviation > Basic theory and experiments > Aircraft ground tests > A variety of environmental testing
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