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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2009, Vol. 30 ›› Issue (10): 1895-1900.

• 固体力学与飞行器设计 • Previous Articles     Next Articles

Preliminary Experimental Measurement of Light Flash Phenomena Produced in Al-Al Hypervelocity Impacts

Tang Enling1,2, Zhang Qingming2, Zhang Jian1   

  1. 1 School of Equipment Engineering, Shenyang Ligong University2 State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology
  • Received:2008-06-26 Revised:2008-09-11 Online:2009-10-25 Published:2009-10-25
  • Contact: Tang Enling

Abstract: To investigate the hypervelocity impact-flash characteristics and rules of light flash temperature variation in different impact parameter conditions, an experimental measurement system platform composed of a pyrometer and subsidiary experimental measurement system is established, and preliminary experimental measurements of hypervelocity impact flash are carried out using the platform. According to the basic theory of Planck distribution, flash intensity data of four wavelengths are collected and their fitting temperatures from every experiment are calculated. Thus the history of flash temperatures is obtained. Experimental results show that for aluminum projectile LY12 impacting aluminum target LY12, when the impact angle (the angle between the projectile and the target plane) remains the same and the impact velocity is between 5.35 km/s and 5.97 km/s, impact velocity has no obvious influence on light flash temperature, while with similar impact velocities, the larger the impact angle is, the higher the impact light flash temperature will be.

Key words: hypervelocity impact, impact flash, pyrometers, Planck radiation, flash intensity, flash temperature

CLC Number: